Back in the days when GROL licenses were classified as First, Second or Third Class. I was inspired to get my First Class license back in 1979 by a fellow name Louis Franklin, K6HN who was known in the CB as "Superspark". I have the honor to meet him and got schooled by him. Now I am 52 years old and I hold a Doctorate degree in Electrical Engineering plus still has my GROL but I have to take my hat off to Mr. "Gate-Keeper". This is by far the best video on this specific subject. This is not new to me but I have never use the TIP29 transistor (NTE291). Excellent work my friend. The only thing is that you really need a tripod... lol God Bless you and keep the good work.
I consider myself at a beginner level. I was able to do both the swing mod and 4700 cap in the back as shown here. All came out fantastic and the cobra 25 Taiwan model is getting great reports. Thank you for making the video.
I'm 225 rajun cajun that's my brother from another mother.i do all my comments from my phone keeper,you might want to look into that.keep up the good work...
When doing this circuit it's imparitive that u use the right capasatance at the electroletic u can use anything from 470 uf to 1000uf ..but if u use a 470uf cap then use a potentiometer that has close to same capasatance... Now this will give u a smooth cycle at the dial watt...also use a 100ohm 1/4 watt to drop the low end ..... Of deadkey ..u can mess with the ohms of the resistor to play with low end carrier ...but the matching capasatance will make it very smooth...the pot should be around the value of the loaded cap at back so if u use 470uf use 500 if u use 1kuf use 1k pot ... Remwber more capasatance is more pillow ...more pillow makes smoother and more flow of variable induction to the drive....good luck
Hey, Gatekeeper! I've watched this video at least 10 times. Installed a variable the Gatekeepr way and everything worked out nice. Quick question.... If I wanted to set my dead key to drop to 1.5-2 watts when I turn my variable all the way down, would I decrease or add more resistance to the curcuit? Ideally, I'd like to reach down and twist my variable all the way counterclockwise and land on a suitable power level before I kick my amp on when I'm driving down the road at night... Thanks for investing so much of your time helping the rest of us explore and enjoy the hobby! 73s Saltshaker
man did this to a 29 this morning and works like charm thanks gatekeeper it really works had some small transistors laying around and stole cap from old car audio amp LOL super quick and easy 707 over and on the side
I enjoyed watching that you're a good tech you explain everything and actually show where the wires go finally somebody who knows what they're doing and how to explain and teach very good thank you the birdman 506 said that we out from the south side of Chicago Bridgeport
You were talking on the radio show bout addiction, I’ve fried galaxy 959s with a lot extras, and taken everything apart to rob of components , have every electronic thing I’ve ever owned in a box or if it was given to me and I couldn’t fix I’ve got circuit boards ready to rob diodes or whatever I need to fix my daily using junk, lol but Ive got parts for days electronic , like said I’m try this
Nice job. This is very important. really important, super important, LOL I wish I knew what the left piece of dust on his right hand knows. and he explains it very well.. Keep up the Great videos brother, they are more appreciated than you may think.
Thank you so much bud...sorry it took so long to respond to you. Your very welcome bud...If you ever feel the need to give back go check this out www.buymeacoffee.com/Gatekeeperamps
Why ure in there stick a 0.1uf ceramic to the center leg of vloumn knob to ground with a switch I use the pa....now u have built a internal high cut filter !!!!? Works wonders
Mr. Gatekeeper. Nice video and enjoy this. Im a new beginner and didn't see what capacitor you use, or the transistor you used, love you to do this to a few radios i have. Let me know. God bless.
I for sure tell what I use in the video 📹. The capacitor can be 220uf 16v or higher or 470uf and the transistor is a non tip transsitor. I love using the 2n3055 these days. 10a transistor. I promise you can do this buddy 💪 I have faith you!. Follow every step I give closely.
Did this to my 29ltd classic, followed your instructions perfectly, Radio didn't work after, no dead key, Talked into the mike and watt meter would rise to 2 watts, tried to set swrs but when I ked the mike while radio was on set swrs the meter just dropped to zero. Took it appart and went through the entire process again (Using the same parts) and same result. Got up this morning and removed the mod, replaced the jumper and radio is back to normal except the rf gain is up all the way and does not adjust, kinda sticky as well, maybe ruined the pot IDK, The radio is new so should have worked ok
Yes, first off I am very sorry for your failed attempt at this. I have done this mod probably around 50 times and there were a time or 2 I had the same results that you had. I remember literally throwing away the transistor and cap and starting all over again. Then it worked as if the transistor was bad from the factory or something. I personally use MJE3055T now and have been for years now. I erg you to buy one of these and try again but since it appears for some weird reason that the rf gain pot is not working buy you another pot off of Ebay or some where to get that bad boy replaced. Try a 1K pot, it will be smoother. I hope you success in this, as you can read through my comments I have had maaaaaany people do this on their own saving them selves some $$$. I hope the same for you bud. Feel free to enjoy my channel I pass on a lot of knowledge with my videos.
@@1883GotDown I removed the mod and found where some solder had jumped from the left final leg to the post right next to it and so I cleaned it up but too late I guess, now my radio only has static, nobody talking, rf pot still not responding so I think I did damage there and if that is fixed maybe the pot will come alive again, I plugged in another radio and it was working with hearing people talking and all, but then plugged this radio back in and just static. What will be the best final to replace it with if in fact that is the damage I caused? or maybe it's a different transistor IDK, In other words i messed it up lol.
Great videos....They help me a lot..Thanks...One thing though, you might try mounting the camera so you don't have to hold it..If its a phone camera mount it on an old hat...I find this works out great. :)
I'm going to do this to my cobra 29, but I'm going to use (1K Ohm Linear Taper Potentiometer B1K Pot, TIP29C NPN 100V 1A transistor, 16V 220uF 105°C electrolytic capacitor, 100 ohm 1\4 watt 5% carbon film resistor) i will update yall soon. thanks Mr. Gatekeeper...456 from the Big Horn said that.
I have a Cobra 29 LTD classic, can I do this MOD if I don't have an Amp yet? I'm shopping around for a two pill; thank you for sharing your knowledge, I'm new in the hobby. Greetings from Minnesota
Yes you can and look no more...if you would like for me to build you your first 2 pill shoot me an email at threemanpro at gmail .Com and we will work it out
Did I do something wrong? I followed instructions as done on this video the reports im getting is loud n clear but then I ask how am I sounding and im told a little staticky. Now could I have done something wrong what im thinking is the orientation of the resistor everything else is done as explained in the video just that the resistor is what im thinking is put in wrong unless if it don’t matter.. let me know what you think thanks
The resistor doesn't have an orientation to it. It doesn't matter which way it is soldered. As along as it is soldered. Make sure you have your dead key turned up high enough because if it is turned down to low then you will sound choppy or statically. Do you have a meter in line so you can see how much your dead key is? Also you may want to get more then 1 report. That guy could have been to far away or had some interference in his receiver. This mod will not effect your audio so to say it is just a swing mod and allows you to adjust your Carrier from Nothing to whatever it can go to. Good luck let me know if you have any more questions.
@@1883GotDown just today another driver said i sounded clear and that my audio sounded good to him. I used the RF knob like in your but this knob has the dual dynamike and rf in one. From your video i determined that the section that has only 2 wires soldered was the RF wire it had 3 terminals but only 2 where used. Also too when I grounded the resistor I did the same thing you did to a pod but in my radio I didn’t need to ruff up the top like you did there was 2 pods joined together at the top and I went off of that so is that a good choice or should I solder the resister to it’s own ground…. I don’t have a swr/power meter im working on getting that but what is a good meter for mobile use in a Semi Truck im thinking A dosy TR1000 or TR2000…… one thing I want to point out as well is the built in meter on my radio when i have the switch in RF mode the needle moves with the turn of the RF knob i soldered the wires to.
Radio Shack only had a TIP31 and the guy said it was equivalent to a TIP29. I also got a 100ohm resistor 1\2 watt and 220uf 35v radial because those were my only choices. Would like some input before I install it and I'm in no hurry to do it.
hey brother I am sorry I have not been able to stay current with my comments in the past year or two I would like to hear if you finally did a modification because everything you got is good to go if you have not done the modification yet I have had a lot of good feedback from people doing these modifications thanks a bunch and good luck.
Wish I could get mine set up like this here with that 10,000 capacitor you got on there with a digital TalkBack board Echo board that is when can I send my radio to you?
hello interesting video. So after completing this mod what is the final output watts? I know this radio output is 3watts but would like to see what it does now. Thanks George
hello, have not heard from you? I have questions about the install: Did you leave the original Final TR or was it changed? And what was the output power after this mod? Thanks, George.
Yes the final stayed the same in thia particular video but it doesn't matter if it is changed this mod remains the same. The output after this mod can vary from radio to radio. Ill always turn my modulation up to 100 percent or a bit more and will usually get about 4 to 6 w RMS 14 to 20w PEP. Each radio can be a bit different with factory final. Good luck buddy sorry for the delay on reply.
There is many deffrent ways to do this mod. I like this way ok. But i myself like useing a 25 volt 1000uf cap and solder some wires to a variable resistor.
@@1883GotDown In your video you soldered the transistor to JP6 and you tapped into the L11 choke. My question is where do you find those connection points on a Madison or a Washington PC board? I would venture to say they are not all the same?
@@josediaz-tq5cz NO, this is only for a Radio with the same type board a Cobra 29 has in it. There are only a few radios like unidens that are the same. In a lot of the radios like your talking about will already have a pot in there for the carrier. Alot of people just remove the pot inside and extend it to the outside but I can't help you with that cause I'm not a radio tech. But if you can figure out which pot adjusts the carrier then you can find out what size that pot is. Lets say it is a 5k. Then buy a 5k external pot. Mount it in the back or use a pot up front.
great video. I don't try mods unless I know they work,in this case I have faith in the fact that I can do it and I just might try it . I should be able to use a tip 31 shouldn't I ?
Where does that jumper location lead to? Somewhere between voltage and the driver transistor? Is there a universal location to install this so it'll work with non-cobra radios?
the problem with this is each radios traces can be completly different and honestly on a lot of radios all you have to do is extend the AM Power POT to an external 1k, 5K or 10K POT as for example with a Cobra 148 or many of the Ranger Model Radios. Always make sure to double check via some good ole searches on the internet first and a lot of times you will find you don't even have to do as much work as is done in this video. -Gatekeeper
JynxXReKoiL maybe i can help with this one. it's a mobile radio. i would use a cap with a rating no lower that 15 volts. the voltage being the minimum rating for the cap but maximum for the vehicles charging system. so if your vehicles system makes 19 volts max. you'll want a 20 volt cap. but by enlarge most are 14.3 volts max. but put a volt ohm meter on the battery to make sure. and at a rev high enough to get the regulator working soon after your engine has started. the charging voltage will be the highest then in an attempt to boost the battery back to full charge. now if you use a battery charger wile you run a radio. it'll be best to put in a 25 volt cap to be safe. as many chargers will run up close to 18 volts or more depending of the state of the battery plates and amount of sulfation on them. highly sulfated batteries can cause chargers to jump up to the max voltage of the transformers possible output. i hope i haven't overstepped my boundaries +mr gatekeeper.
1883GotDown OK..Thanks! I appreciate you taking the time to explain this. I watch your videos all the time an have learned quite a bit. I would like to add this to my radio and was wondering where you solder the leads of the capacitor to? And does it have to be an electrolytic capacitor?
are all cobra 29 ltd classic boards alike? mines a classic side mic. it also has audio issues. i think the speaker has gone bad or the audio amp is fried. but if it were the amp then the ext speaker would work as sadly. but it works fine. and if the amp has fried. would that make the transmitted audio sound messed up too? i hear about this high wattage ic audio chip being used in some radios. could this be installed in mine? i would also like to install the final swap kit in it too. maybe a uppers and lowers kit too. one that could be added to it, like a band switch on galaxy radios. or is that just a crystal thing. more crystals, more bands to switch to. i want it to go up to the am portion of the 10 meter ham band. 29.000~29.200.... and if i get a cobra ssb radio. i want to go down to the 12 meters band 24.890- 24.990 too.
What type of transistor should i get as far as brand goes who makes the best transistor? Also I came across 4 different types of TIP 29s 29/29A/29B/29C does it matter which one to use? Thanks in advance
@@ramonnunez8951 Fairchilds are great but about any will do...today I used a generic tip 3055 from radio shack and I think I like it the best I used it in a 1pill 29 cobra...the 3055 is rated at 60v 15amp 90watts it is a npn also...hope that helps and happy modding' 73's
My variable is choppy or jumpy. From 0 I start to turn it up and it jumps all the way to two. And when I turn it down it goes from one to 0 like jumps straight there. Whats going on?
I've tried a 1k a 5k a 500 and I even changed all the components wires and all. It's something in the radio, not the variable.. No big deal. The radio sounds perfect. As smooth as I've ever heard one guy said. I'm not using an amp on it right now anyway. But I didn't describe it the best either I don't guess. It's smooth at the start but then jumps almost all the way up of all the way down. like 6,5,4, then bam 0 or a little off 0 and then bam 2. like I said oh well...lol I'll get it one day...
Just a guess here, but do you know if you have a linear or audio taper potentiometer? They are different and might cause your issue. A linear taper will increase faster than an audio taper. For example, both types will be about the same up to say, 50%, but past that, the linear taper will take off up to 100% quickly. The audio taper will be smoother and are generally used in volume controls. And check the obvious like bad solder joints or grounds. If I had a dollar for every HOUR I've spent tracking down a stupid loose solder joint or wire!
Jarod Jordan Great question, It's a bit too complicated to tell you HOW, although I can tell you what needs to be accomplished. I can tell you, you're not going to do it using a PLL mod or a crystal on a switch circuit. What's done in adding weather band RX, or even the 151.xx MHZ (+/-) an excellent range of MHZ portion as per your choice- let's just say overall business band freq. spectrum, So as to listen to your local area Snow plows, Taxi's, All sorts of Delivery services ETC. (you get the idea)... that will involve mods for receive properly, and with good receive sensitivity, is-you will need to know what you're doing as far as circuit design.(you're gonna have to design the following)- #1) you will have to make a simple FM Discriminator, as the Weather band and Freq. Spectrum I've mentioned both RX on FM, not AM. With this being the case- you will have RX that is very distorted. But wait a second- if you have a delta tune or better yet- a SSB CB radio that obviously has a clarifier, you can use that to use "Slope Detection". Not a perfect remedy, but it DOES work so the choice of how to receive an FM signal clearly on an AM radio such as your 29 LTD Classic is yours and you should be somewhat OK using only your delta tune. The OLDER 29 LTD has a great deltaTune I recall. If You would like to listen to Aircraft on your 29 LTD, you can and you'd also skip the FM Discriminator circuit completely as Aircraft Band uses AM like your CB does . This completes step #1 . On toStep #2) requires that you will have to construct a Local Oscillator- also somewhat simple in design. The Local Oscillator should be made "Variable", (as in having a clarifier for your weather frequencies)- instead of a switch with a knob on it, so you can tune out of band,and get all of the weather channel frequencies available for receive- without having to first buy at least one crystal thus limiting you to ONE weather channel. There are other ways to achieve this such as designing a basic Frequency Multiplier, and Up-Converter but its not only OVERKILL for what you want but is more complicated, and... depending on how you design the Freq. Multiplier/ Up-Converter you can introduce receive images, harmonics, and lousy RX sensitivity, not to mention bad overall sound quality. Whatever circuit you choose to achieve to get up to the weather band, that circuit will be wired just as your present local oscillator in the CB is on your PC board. You will need to switch your home made local Osc. in/out using rg174/u coax at the appropriate traces on the CB's PC board, as you can't-have 2 Loc. Osc's on the same spot running at 2 diff. frequencies. You will also want to include power on or off appropriately configured to your Local Osc. that you constructed. In other words, it will coincide with either CB receive or WX receive. Short of doing the job for you, this is a description of how it's done and I hope I have answered your question, always a pleasure to help out in the CB world. I know this sounds complicated if you aren't familiar with the cool circuit designs, but I've done this many times and when I saw your question, I had to get into it and reply back. 73's, peace. Jeff
+BassheadGTP this does not add any more power to the radio . this is just to lower your carrier to match it to the input of your amplifier so it wont sound like hell
It's just a fairly generic power transistor intended for audio and DC applications. Any NPN power transistor with a collector current rating of between 1 and 4 amperes will do. There's nothing overly critical about this mod. Pick a transistor that has a low cut out frequency so the radio's RF doesn't affect it.
I just bought 10 of the 500k ohm pots off ebay and I realized they are only Maximum Power:0.5W Maximum Voltage:200V Type:Linear my guess this the wrong ones? I dont know?
TIP29 TO220 Power transistor, 470uf 25v electrolytic capacitor, 100 ohm 1/2w metal film resistor, 500 ohm linear carbon track potentiometer. Hookup wire. If I were doing the mod, I would bolt the transistor to the heatsink it is going to be installed next to using a silicone pad and a nylon bolt and nut as I suspect it will get quite hot during extended key down when the power is turned down. It's controlling the supply current and is not dealing with RF itself so the leads going to the board don't have to be super short. Doing this will also help the electrolytic capacitor to not get hot also.
Hello, I'm 142 white scorpion, I'M doing a project,I have 2 power supply atx(computer) at 11.90, Can I put them together to get more amperage? I want it to run a cobra 148, thank you
"The purpose is so you can turn it down to 2 watts for an amp so you dont hit the amp with too much power." Not mentioned is that 27MHz CB amplifiers are completely illegal in the USA. Secondly, the unit is designed to work and modulate best at about 4 watts carrier output ("dead key" for newbies). 3rdly, assuming one is OK with illegal operation, a better approach is to incorporate a pad, or attenuator into the amp to work with 4 watts carrier / 16 watts peak without clipping. Bur really, If you want to run power GET a HAM license!
You do know we live in a different era now...this is the digital era. If this brings people joy dont knock it and yes I agree with you....everyone should get their ham licenses and work all the easy towards your extra class if able cause rtty ft8 ft4 eme meteor bounce is some fun stuff that is for sure. BTW I agree with you about the attenuator but most operators are just regular guys wanting to run a little power and lower their carrier a bit so that they do not kill their amplifiers because most of those type of amps are not made that well. Also over the years this video has brought hundreds of people joy of being able to mod their own radio so that they can adjust their carrier accordingly to match up with what ever they are running.
It's pretty simple to get more power, do this mod 1st, then open vr4 on the scope till it goes JUST barely over pinched off on the negatives. Then open the slug by the final about 4 turns watching the meter as you go then when it stops climbing on the watt meter go back in on the slug about a 1/4 turn. Set the dead key to roughly 2 to 2.5 watts and that's all your gonna get out of a stock 29 final. ITS NOT WORTH THE EXTRA 1/4 WATT TO MESS WITH THE BIASING ON THE DRIVER, LEAVE IT BE... Enjoy...
@@jeremyarnold1979 i do not got a watt meter, but i got a B&K 415 sweep marker generator and a 25mhz scope. on a TV i would use the IF in the tuner to align, dont know were i would look on a CB
basically I don't know where I would be injecting, or what the way form coming back would need to look like. because obviously it's gonna set me up for aligning the I F on a color television
THE BIGGIE Z it is all preference...I personally dont use my RF Gain ever..i use my volume knob but the SWR Pot is a good one to use use because you can still use the swr function.
LOL.. I think you're the first person I've ever known to use their RF gain knob. I've never used mine (except to either remove it for a different control or a mod). Why do you use yours if I may ask?
@@billybobsowbreath1774 I use my RF gain control often as well. Sometimes to cut down on background noise and jibberish when I'm driving because the squelch in my 29 is wonky. But mostly I use it when me and several other drivers are on location in the oil fields waiting to unload. We're often waiting for several hours, and 2 to 6 trucks parked side by side or at least very close to each other. I don't like being so close with a bunch of radios hammering each other and the audio is distorted from being too close as well. Hope that helps.
Lol lol are you being serious man??? Every tech that rubs a Cobra 29 on his bench has this done.... this is the default mod you do to a Cobra 29 so known it is hard to find anyone that has known about it. It allows you to adjust your carrier from 0 to your top end usually around 4 to 6w and you swing the same each time. For a regular user it is how you match your radio to an amp with out sending it yo a tech. I've gotten 284 messages thanking me since I did this crappy video So so many years ago cause the followed it and done it. All 3 of my Cobra 29 on my bench has it done. It is default brother. Hope this helps you understand why. You can lower your dead using this mod but making it fixed instead of a variable but wouldn't you want to have control over it incase one amp need more carrier then the other???
@@BornAgain717 threemanpro@gmail.com Let's see what you have...im not really taking in anything but let's see what you got and see if i can help ya some how
Holy shit. You know what you're doing modding the radio but your camera work was fucking terrible. I got car sick trying to watch. Dude seriously get a tripod! I wanna keep watching but man, video is rough :(
Back in the days when GROL licenses were classified as First, Second or Third Class. I was inspired to get my First Class license back in 1979 by a fellow name Louis Franklin, K6HN who was known in the CB as "Superspark". I have the honor to meet him and got schooled by him.
Now I am 52 years old and I hold a Doctorate degree in Electrical Engineering plus still has my GROL but I have to take my hat off to Mr. "Gate-Keeper".
This is by far the best video on this specific subject. This is not new to me but I have never use the TIP29 transistor (NTE291). Excellent work my friend. The only thing is that you really need a tripod... lol
God Bless you and keep the good work.
Thank you sir and i plan to get my GROL one of these days. If i lived close to a habor i would have already done it. Thanks
I consider myself at a beginner level. I was able to do both the swing mod and 4700 cap in the back as shown here. All came out fantastic and the cobra 25 Taiwan model is getting great reports. Thank you for making the video.
You are very welcome bud.
If you feel the need to give back go check this out
www.buymeacoffee.com/Gatekeeperamps
I'm 225 rajun cajun that's my brother from another mother.i do all my comments from my phone keeper,you might want to look into that.keep up the good work...
Hope You are doing ok This is a great How to vid Not every tech shows their work! Hope to see more vids like this from you soonTHANKS FOR SHARING💙
Your very welcome bud...If you ever feel the need to give back go check this out
www.buymeacoffee.com/Gatekeeperamps
When doing this circuit it's imparitive that u use the right capasatance at the electroletic u can use anything from 470 uf to 1000uf ..but if u use a 470uf cap then use a potentiometer that has close to same capasatance... Now this will give u a smooth cycle at the dial watt...also use a 100ohm 1/4 watt to drop the low end ..... Of deadkey ..u can mess with the ohms of the resistor to play with low end carrier ...but the matching capasatance will make it very smooth...the pot should be around the value of the loaded cap at back so if u use 470uf use 500 if u use 1kuf use 1k pot ... Remwber more capasatance is more pillow ...more pillow makes smoother and more flow of variable induction to the drive....good luck
Lol where do you come up with this knowledge like this.... ill be honest I've never heard of this before. Won't hurt to play around will it.
Your very welcome bud...If you ever feel the need to give back go check this out
www.buymeacoffee.com/Gatekeeperamps
Hey, Gatekeeper!
I've watched this video at least 10 times.
Installed a variable the Gatekeepr way and everything worked out nice.
Quick question....
If I wanted to set my dead key to drop to 1.5-2 watts when I turn my variable all the way down, would I decrease or add more resistance to the curcuit?
Ideally, I'd like to reach down and twist my variable all the way counterclockwise and land on a suitable power level before I kick my amp on when I'm driving down the road at night...
Thanks for investing so much of your time helping the rest of us explore and enjoy the hobby!
73s
Saltshaker
it sure makes it much more understandable , the way you show every connection, this ia an Awesome video, like Bryant said, Love this video, Thanks Bro
Your very welcome bud...If you ever feel the need to give back go check this out
www.buymeacoffee.com/Gatekeeperamps
man did this to a 29 this morning and works like charm thanks gatekeeper it really works had some small transistors laying around and stole cap from old car audio amp LOL super quick and easy 707 over and on the side
return the favor and pay me the cash you owe me big brother :)
Nena Pike gonna pay me man?
what was the final output power?
What was the final output power after you did this?
Awsome video I'm new to CB mods so videos like this are a jewel to stumble across. Liked and subscribed thanks again
Your very welcome bud...If you ever feel the need to give back go check this out
www.buymeacoffee.com/Gatekeeperamps
Great job showing us how to do this. Very easy to follow. Thanks.
Your very welcome bud...If you ever feel the need to give back go check this out
www.buymeacoffee.com/Gatekeeperamps
I enjoyed watching that you're a good tech you explain everything and actually show where the wires go finally somebody who knows what they're doing and how to explain and teach very good thank you the birdman 506 said that we out from the south side of Chicago Bridgeport
Your very welcome bud...If you ever feel the need to give back go check this out
www.buymeacoffee.com/Gatekeeperamps
Best video I’ve see brother. I appreciate it so much. Thank you.
Your very welcome
that video has helped me and others so many times.
Your very welcome bud...If you ever feel the need to give back go check this out
www.buymeacoffee.com/Gatekeeperamps
Going try this, soon as I get another antenna , and pill for the Texas star I forget to turn RF gain down a lot
I got transistors if you need them 678 557 4846
You were talking on the radio show bout addiction, I’ve fried galaxy 959s with a lot extras, and taken everything apart to rob of components , have every electronic thing I’ve ever owned in a box or if it was given to me and I couldn’t fix I’ve got circuit boards ready to rob diodes or whatever I need to fix my daily using junk, lol but Ive got parts for days electronic , like said I’m try this
Lol yep ur addicted man!! Lol
Nice job. This is very important. really important, super important, LOL I wish I knew what the left piece of dust on his right hand knows. and he explains it very well.. Keep up the Great videos brother, they are more appreciated than you may think.
Thank you so much bud...sorry it took so long to respond to you. Your very welcome bud...If you ever feel the need to give back go check this out
www.buymeacoffee.com/Gatekeeperamps
Why ure in there stick a 0.1uf ceramic to the center leg of vloumn knob to ground with a switch I use the pa....now u have built a internal high cut filter !!!!? Works wonders
Mr. Gatekeeper. Nice video and enjoy this. Im a new beginner and didn't see what capacitor you use, or the transistor you used, love you to do this to a few radios i have. Let me know. God bless.
I for sure tell what I use in the video 📹. The capacitor can be 220uf 16v or higher or 470uf and the transistor is a non tip transsitor. I love using the 2n3055 these days. 10a transistor. I promise you can do this buddy 💪 I have faith you!. Follow every step I give closely.
It is a mje 3055 search eBay for it
@@1883GotDown Thank you very much but u probably did say but getting old LOL and hearing isn't good. Thanks again. Keep doing videos. 🎥🎥
Did this to my 29ltd classic, followed your instructions perfectly, Radio didn't work after, no dead key, Talked into the mike and watt meter would rise to 2 watts, tried to set swrs but when I ked the mike while radio was on set swrs the meter just dropped to zero. Took it appart and went through the entire process again (Using the same parts) and same result. Got up this morning and removed the mod, replaced the jumper and radio is back to normal except the rf gain is up all the way and does not adjust, kinda sticky as well, maybe ruined the pot IDK, The radio is new so should have worked ok
Yes, first off I am very sorry for your failed attempt at this. I have done this mod probably around 50 times and there were a time or 2 I had the same results that you had. I remember literally throwing away the transistor and cap and starting all over again. Then it worked as if the transistor was bad from the factory or something. I personally use MJE3055T now and have been for years now. I erg you to buy one of these and try again but since it appears for some weird reason that the rf gain pot is not working buy you another pot off of Ebay or some where to get that bad boy replaced. Try a 1K pot, it will be smoother.
I hope you success in this, as you can read through my comments I have had maaaaaany people do this on their own saving them selves some $$$. I hope the same for you bud. Feel free to enjoy my channel I pass on a lot of knowledge with my videos.
@@1883GotDown I removed the mod and found where some solder had jumped from the left final leg to the post right next to it and so I cleaned it up but too late I guess, now my radio only has static, nobody talking, rf pot still not responding so I think I did damage there and if that is fixed maybe the pot will come alive again, I plugged in another radio and it was working with hearing people talking and all, but then plugged this radio back in and just static. What will be the best final to replace it with if in fact that is the damage I caused? or maybe it's a different transistor IDK, In other words i messed it up lol.
@@1883GotDown Your video was great by the way, I'm just old, blind and my hands now shake like a leaf on a tree..
@@1883GotDown Update,, Replaced the rf gain pot and all is back to normal, I will order the new mje3055t and do it again. Thanks for the videos
Have you played any with the new old cobra 29 ltd classic duel Am/FM units?
Dual? Not sure honestly
Great videos....They help me a lot..Thanks...One thing though, you might try mounting the camera so you don't have to hold it..If its a phone camera mount it on an old hat...I find this works out great. :)
Your very welcome bud...If you ever feel the need to give back go check this out
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good info , cant go wrong with the 25 n the pc 66
I will do those next
I like to use TIP31, its a bit heavier part.
But really there is a few dozen TIP's that will work.
After completing this install what was the output power?
Indeed you are correct....honestly this part never gets hot so any of them will work great 👍 always use what you feel most comfortable using.
@@georgealbertacanadaeh1038 15 to 20w pep
The cap you showed at the end for the power filter... 4700uf what is the voltage on that one please and thank you
Would still like to know what voltage your 4700uf cap is for your filter at the power plug
Me too
I'm going to do this to my cobra 29, but I'm going to use (1K Ohm Linear Taper Potentiometer B1K Pot, TIP29C NPN 100V 1A transistor, 16V 220uF 105°C electrolytic capacitor, 100 ohm 1\4 watt 5% carbon film resistor) i will update yall soon. thanks Mr. Gatekeeper...456 from the Big Horn said that.
David Soliz awesome...let me know how it goes bud
Awesome bud 6 years waiting on update lol lollol
I have a Cobra 29 LTD classic, can I do this MOD if I don't have an Amp yet? I'm shopping around for a two pill; thank you for sharing your knowledge, I'm new in the hobby. Greetings from Minnesota
Yes you can and look no more...if you would like for me to build you your first 2 pill shoot me an email at threemanpro at gmail .Com and we will work it out
Did I do something wrong? I followed instructions as done on this video the reports im getting is loud n clear but then I ask how am I sounding and im told a little staticky. Now could I have done something wrong what im thinking is the orientation of the resistor everything else is done as explained in the video just that the resistor is what im thinking is put in wrong unless if it don’t matter.. let me know what you think thanks
The resistor doesn't have an orientation to it. It doesn't matter which way it is soldered. As along as it is soldered.
Make sure you have your dead key turned up high enough because if it is turned down to low then you will sound choppy or statically. Do you have a meter in line so you can see how much your dead key is?
Also you may want to get more then 1 report. That guy could have been to far away or had some interference in his receiver. This mod will not effect your audio so to say it is just a swing mod and allows you to adjust your Carrier from Nothing to whatever it can go to.
Good luck let me know if you have any more questions.
@@1883GotDown just today another driver said i sounded clear and that my audio sounded good to him. I used the RF knob like in your but this knob has the dual dynamike and rf in one. From your video i determined that the section that has only 2 wires soldered was the RF wire it had 3 terminals but only 2 where used. Also too when I grounded the resistor I did the same thing you did to a pod but in my radio I didn’t need to ruff up the top like you did there was 2 pods joined together at the top and I went off of that so is that a good choice or should I solder the resister to it’s own ground…. I don’t have a swr/power meter im working on getting that but what is a good meter for mobile use in a Semi Truck im thinking A dosy TR1000 or TR2000…… one thing I want to point out as well is the built in meter on my radio when i have the switch in RF mode the needle moves with the turn of the RF knob i soldered the wires to.
@@ramonnunez8951 hey buddy did you ever get it figured out.
does the wire from the choke go to the tip 29 go to the variable
Radio Shack only had a TIP31 and the guy said it was equivalent to a TIP29. I also got a 100ohm resistor 1\2 watt and 220uf 35v radial because those were my only choices. Would like some input before I install it and I'm in no hurry to do it.
hey brother I am sorry I have not been able to stay current with my comments in the past year or two I would like to hear if you finally did a modification because everything you got is good to go if you have not done the modification yet I have had a lot of good feedback from people doing these modifications thanks a bunch and good luck.
Wish I could get mine set up like this here with that 10,000 capacitor you got on there with a digital TalkBack board Echo board that is when can I send my radio to you?
Well if I take on any more radio work it will be after I get caught up buddy..... I do enjoy working on radios
@@1883GotDown okay thank you sir
hello interesting video. So after completing this mod what is the final output watts? I know this radio output is 3watts but would like to see what it does now.
Thanks
George
It can vary. It will usually be any where from 15w to 20w usually. This is PEP RMS is usually 3w to 5w.
Hey man !!! luv the vid's keep them coming .. what does the trimmer do in a amp ?
Helps with tuning.
hello, have not heard from you? I have questions about the install: Did you leave the original Final TR or was it changed? And what was the output power after this mod?
Thanks, George.
Yes the final stayed the same in thia particular video but it doesn't matter if it is changed this mod remains the same. The output after this mod can vary from radio to radio. Ill always turn my modulation up to 100 percent or a bit more and will usually get about 4 to 6 w RMS 14 to 20w PEP. Each radio can be a bit different with factory final.
Good luck buddy sorry for the delay on reply.
When you direct wire your rf gain wires together, does that cause your rf gain to be full blast?
Yeah it leaves the RF in the same as the max position
Lol lol lol those are not rf wires bud.... those are dc
@@paulreyesarellano6496 lol
There is many deffrent ways to do this mod. I like this way ok. But i myself like useing a 25 volt 1000uf cap and solder some wires to a variable resistor.
Good idea 💡
Do you have information on doing this on a cobra 139 23channel base that you cound share or point me too? thanks
I'm so sorry I dont
How do you find the connection points to different radios such as a Washington or Madison?
Srry I dont understand the ? What connection points?
@@1883GotDown In your video you soldered the transistor to JP6 and you tapped into the L11 choke. My question is where do you find those connection points on a Madison or a Washington PC board? I would venture to say they are not all the same?
@@josediaz-tq5cz NO, this is only for a Radio with the same type board a Cobra 29 has in it. There are only a few radios like unidens that are the same. In a lot of the radios like your talking about will already have a pot in there for the carrier. Alot of people just remove the pot inside and extend it to the outside but I can't help you with that cause I'm not a radio tech.
But if you can figure out which pot adjusts the carrier then you can find out what size that pot is. Lets say it is a 5k. Then buy a 5k external pot. Mount it in the back or use a pot up front.
@@1883GotDown Ok, I get it
thanks for sharing your videos
Your very welcome bud...If you ever feel the need to give back go check this out
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great video. I don't try mods unless I know they work,in this case I have faith in the fact that I can do it and I just might try it . I should be able to use a tip 31 shouldn't I ?
I've been using a TIP31C and had no issues. I think you can also use a TIP120. I also use a 100uf to 220uf cap.
Yes sir you can.
@@billybobsowbreath1774 thanks bud
inj the video you said use a 470mf 25 volt or greater but your diagram showws a 220uf cap,which one do you use?
220uf will work, 470uf is what most people use.
thanks
please more mod videos love this video thanks
Bryant Murden will do more to come
I have more coming bud!
Your very welcome bud...If you ever feel the need to give back go check this out
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Is there any way to make this happen with a cobra21ltdwx Malaysia model?
Oh my goodness I honestly don't know...maybe someone else can help this gentleman out please??
can we use a tip 120 if we can not find a tip 29
As long as it is the same as a TIP29 as in Being a NPN then yes you should be just fine using that :)
Silly question, if I had a irf520 mosfet done could I still do this setup to make it variable?
Of course bud!
Can a dead key be done like this in a cobra cam 89? I'd imagine it's gonna be different.
Yes it can and yes it will be a little diff
The resistor controls the carrier level ...1/4 watt 100ohm is perfect
No the 100ohm keep your pot from burning up bud. The variable helps more with that. Just wanted to correct you respectfully of course. :)
After this mod your carrier will do down to nothing if you want it with the variable. The 100 ohm doesn't control that.
hello can you send me the wiring diagram please and what is the final output power? Did you replace the final amp?
Bud I explain everything in super fine detail in this video.....if you take time to go through it I promise you, you will be able to do the mod.
I think I show a schematic in the video also
No you don't replace the final transistor in this mod.
Where does that jumper location lead to? Somewhere between voltage and the driver transistor? Is there a universal location to install this so it'll work with non-cobra radios?
the problem with this is each radios traces can be completly different and honestly on a lot of radios all you have to do is extend the AM Power POT to an external 1k, 5K or 10K POT as for example with a Cobra 148 or many of the Ranger Model Radios. Always make sure to double check via some good ole searches on the internet first and a lot of times you will find you don't even have to do as much work as is done in this video.
-Gatekeeper
have done this mod to my radio & works well, can i add the the typical mosfet upgrade with this in place?
Of course bud
Your very welcome bud...If you ever feel the need to give back go check this out
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Great video! Thanks for sharing! I'm going to subscribe. Hope you are doing well.
Your very welcome bud...If you ever feel the need to give back go check this out
www.buymeacoffee.com/Gatekeeperamps
Hello Mr. GateKeeper. What is the voltage rating of the 4700mf filter cap that you installed?
JynxXReKoiL maybe i can help with this one. it's a mobile radio. i would use a cap with a rating no lower that 15 volts. the voltage being the minimum rating for the cap but maximum for the vehicles charging system. so if your vehicles system makes 19 volts max. you'll want a 20 volt cap. but by enlarge most are 14.3 volts max. but put a volt ohm meter on the battery to make sure. and at a rev high enough to get the regulator working soon after your engine has started. the charging voltage will be the highest then in an attempt to boost the battery back to full charge. now if you use a battery charger wile you run a radio. it'll be best to put in a 25 volt cap to be safe. as many chargers will run up close to 18 volts or more depending of the state of the battery plates and amount of sulfation on them. highly sulfated batteries can cause chargers to jump up to the max voltage of the transformers possible output. i hope i haven't overstepped my boundaries +mr gatekeeper.
1883GotDown OK..Thanks! I appreciate you taking the time to explain this. I watch your videos all the time an have learned quite a bit. I would like to add this to my radio and was wondering where you solder the leads of the capacitor to? And does it have to be an electrolytic capacitor?
Yea, go 25v or more. But if you go higher than 25v the cap may end up being too large physically.
16v cause I had a lot of them around but it can be 16v or higher
@@dalemyers9265 good thinking bud hope to hear from you soon man...would love to talk about my 16 I sold to you
Thanks for this!!
Your very welcome bud...If you ever feel the need to give back go check this out
www.buymeacoffee.com/Gatekeeperamps
are all cobra 29 ltd classic boards alike? mines a classic side mic. it also has audio issues. i think the speaker has gone bad or the audio amp is fried. but if it were the amp then the ext speaker would work as sadly. but it works fine. and if the amp has fried. would that make the transmitted audio sound messed up too? i hear about this high wattage ic audio chip being used in some radios. could this be installed in mine? i would also like to install the final swap kit in it too. maybe a uppers and lowers kit too. one that could be added to it, like a band switch on galaxy radios. or is that just a crystal thing. more crystals, more bands to switch to. i want it to go up to the am portion of the 10 meter ham band. 29.000~29.200.... and if i get a cobra ssb radio. i want to go down to the 12 meters band 24.890- 24.990 too.
Can you put this on a 25 ltd classic
Of course...just did yesterday. Works perfect. Just do the same thing. Some of the number are different but ill do another video showing how to do it.
Was the output TR changed or left as?
? TR?
Can you make a video showing how to add the preamp Thanks
Coming soon
What type of transistor should i get as far as brand goes who makes the best transistor? Also I came across 4 different types of TIP 29s 29/29A/29B/29C does it matter which one to use? Thanks in advance
I use either the 29 or the 29c...its just got to be a NPN component
@@xXxWoNdEreR7XxX right on brother and as brand goes is there a better quality than the other??
@@ramonnunez8951 Fairchilds are great but about any will do...today I used a generic tip 3055 from radio shack and I think I like it the best I used it in a 1pill 29 cobra...the 3055 is rated at 60v 15amp 90watts it is a npn also...hope that helps and happy modding' 73's
@@xXxWoNdEreR7XxX what do you think about tip120
@@ramonnunez8951 it will work but my favorite is a tip 41c
Gatekeeper, for the filter cap mod, 4700-10kuF. What would the voltage be?
I was looking to find the answer to the exact same question
I bought and used 4700KuF 25v since the incoming power in a mobile set up shouldn’t be more than 14.5 volts
16v or higher bud and your fine.... 25v or higher to be super fine
@@SuperShawman 16v or higher
@@paulreyesarellano6496 good thinking
Great videoThanks dude!
I do the 4700.at the back but I' do it with heat shrink ...on legs ...
great vid glad I found yah
Where would be the best place to get the components for this mod?
Ebay is perfect.
Will this work on a cobra 148gtl?
What other transistors would serve the purpose of the TIP 29?
OddBall1958 tip3055, I like the MJE3055T, TIP120 any NPN Transistor...thanks for watching bud. Please Share this Video.
I've used a TIP31C, TIP120
My variable is choppy or jumpy. From 0 I start to turn it up and it jumps all the way to two. And when I turn it down it goes from one to 0 like jumps straight there. Whats going on?
TINY snds like the variable pot is too big needs to be a 5k, 1k or 500 ohm anything bigger will be way to jumpy.
Its a 1k pot
TINY you may need to replace it brother. Try a 500ohm pot also.
I've tried a 1k a 5k a 500 and I even changed all the components wires and all. It's something in the radio, not the variable.. No big deal. The radio sounds perfect. As smooth as I've ever heard one guy said. I'm not using an amp on it right now anyway. But I didn't describe it the best either I don't guess. It's smooth at the start but then jumps almost all the way up of all the way down. like 6,5,4, then bam 0 or a little off 0 and then bam 2. like I said oh well...lol I'll get it one day...
Just a guess here, but do you know if you have a linear or audio taper potentiometer? They are different and might cause your issue.
A linear taper will increase faster than an audio taper.
For example, both types will be about the same up to say, 50%, but past that, the linear taper will take off up to 100% quickly. The audio taper will be smoother and are generally used in volume controls.
And check the obvious like bad solder joints or grounds. If I had a dollar for every HOUR I've spent tracking down a stupid loose solder joint or wire!
How would u put weather band in a cobra 29 ltd classic
Jarod Jordan Great question, It's a bit too complicated to tell you HOW, although I can tell you what needs to be accomplished. I can tell you, you're not going to do it using a PLL mod or a crystal on a switch circuit. What's done in adding weather band RX, or even the 151.xx MHZ (+/-) an excellent range of MHZ portion as per your choice- let's just say overall business band freq. spectrum, So as to listen to your local area Snow plows, Taxi's, All sorts of Delivery services ETC. (you get the idea)... that will involve mods for receive properly, and with good receive sensitivity, is-you will need to know what you're doing as far as circuit design.(you're gonna have to design the following)- #1) you will have to make a simple FM Discriminator, as the Weather band and Freq. Spectrum I've mentioned both RX on FM, not AM. With this being the case- you will have RX that is very distorted. But wait a second- if you have a delta tune or better yet- a SSB CB radio that obviously has a clarifier, you can use that to use "Slope Detection". Not a perfect remedy, but it DOES work so the choice of how to receive an FM signal clearly on an AM radio such as your 29 LTD Classic is yours and you should be somewhat OK using only your delta tune. The OLDER 29 LTD has a great deltaTune I recall. If You would like to listen to Aircraft on your 29 LTD, you can and you'd also skip the FM Discriminator circuit completely as Aircraft Band uses AM like your CB does . This completes step #1 . On toStep #2) requires that you will have to construct a Local Oscillator- also somewhat simple in design. The Local Oscillator should be made "Variable", (as in having a clarifier for your weather frequencies)- instead of a switch with a knob on it, so you can tune out of band,and get all of the weather channel frequencies available for receive- without having to first buy at least one crystal thus limiting you to ONE weather channel. There are other ways to achieve this such as designing a basic Frequency Multiplier, and Up-Converter but its not only OVERKILL for what you want but is more complicated, and... depending on how you design the Freq. Multiplier/ Up-Converter you can introduce receive images, harmonics, and lousy RX sensitivity, not to mention bad overall sound quality. Whatever circuit you choose to achieve to get up to the weather band, that circuit will be wired just as your present local oscillator in the CB is on your PC board. You will need to switch your home made local Osc. in/out using rg174/u coax at the appropriate traces on the CB's PC board, as you can't-have 2 Loc. Osc's on the same spot running at 2 diff. frequencies. You will also want to include power on or off appropriately configured to your Local Osc. that you constructed. In other words, it will coincide with either CB receive or WX receive. Short of doing the job for you, this is a description of how it's done and I hope I have answered your question, always a pleasure to help out in the CB world. I know this sounds complicated if you aren't familiar with the cool circuit designs, but I've done this many times and when I saw your question, I had to get into it and reply back. 73's, peace. Jeff
can a cobra 29 ltd st be modified with a mosfet swing kit?
If the Cobra 29 Has A mosfet in it use a 220uf. Seems to be a bit smoother to me atleast.
what amperage and voltage is the tip 29?
oh, also what kind of power should this show?
+BassheadGTP this does not add any more power to the radio . this is just to lower your carrier to match it to the input of your amplifier so it wont sound like hell
It's just a fairly generic power transistor intended for audio and DC applications. Any NPN power transistor with a collector current rating of between 1 and 4 amperes will do. There's nothing overly critical about this mod. Pick a transistor that has a low cut out frequency so the radio's RF doesn't affect it.
Have to look up the datasheet man. Srry
@@jimmyjohnson2338 thanks
I just bought 10 of the 500k ohm pots off ebay and I realized they are only Maximum Power:0.5W
Maximum Voltage:200V
Type:Linear my guess this the wrong ones? I dont know?
What is the three components you used ?
TIP29 TO220 Power transistor, 470uf 25v electrolytic capacitor, 100 ohm 1/2w metal film resistor, 500 ohm linear carbon track potentiometer. Hookup wire. If I were doing the mod, I would bolt the transistor to the heatsink it is going to be installed next to using a silicone pad and a nylon bolt and nut as I suspect it will get quite hot during extended key down when the power is turned down. It's controlling the supply current and is not dealing with RF itself so the leads going to the board don't have to be super short. Doing this will also help the electrolytic capacitor to not get hot also.
@@Dazzwidd thanks bud
Hope you enjoyed
Hello, I'm 142 white scorpion, I'M doing a project,I have 2 power supply atx(computer) at 11.90, Can I put them together to get more amperage? I want it to run a cobra 148, thank you
That mod isnt necessary. Just buy any linear with an input range of 1.5 - 6 watts and your good.
I don't understand where the wire from L11 goes to.
Phil Partin you ever figure it out bus
I can respond to comments by my cell
Yeah 7 years ago it didn't lol now it does.
"The purpose is so you can turn it down to 2 watts for an amp so you dont hit the amp with too much power." Not mentioned is that 27MHz CB amplifiers are completely illegal in the USA. Secondly, the unit is designed to work and modulate best at about 4 watts carrier output ("dead key" for newbies). 3rdly, assuming one is OK with illegal operation, a better approach is to incorporate a pad, or attenuator into the amp to work with 4 watts carrier / 16 watts peak without clipping. Bur really, If you want to run power GET a HAM license!
You do know we live in a different era now...this is the digital era. If this brings people joy dont knock it and yes I agree with you....everyone should get their ham licenses and work all the easy towards your extra class if able cause rtty ft8 ft4 eme meteor bounce is some fun stuff that is for sure. BTW I agree with you about the attenuator but most operators are just regular guys wanting to run a little power and lower their carrier a bit so that they do not kill their amplifiers because most of those type of amps are not made that well. Also over the years this video has brought hundreds of people joy of being able to mod their own radio so that they can adjust their carrier accordingly to match up with what ever they are running.
now if only i can find a video on how to get more output power.
It's pretty simple to get more power, do this mod 1st, then open vr4 on the scope till it goes JUST barely over pinched off on the negatives. Then open the slug by the final about 4 turns watching the meter as you go then when it stops climbing on the watt meter go back in on the slug about a 1/4 turn. Set the dead key to roughly 2 to 2.5 watts and that's all your gonna get out of a stock 29 final. ITS NOT WORTH THE EXTRA 1/4 WATT TO MESS WITH THE BIASING ON THE DRIVER, LEAVE IT BE... Enjoy...
@@jeremyarnold1979 i do not got a watt meter, but i got a B&K 415 sweep marker generator and a 25mhz scope. on a TV i would use the IF in the tuner to align, dont know were i would look on a CB
basically I don't know where I would be injecting, or what the way form coming back would need to look like. because obviously it's gonna set me up for aligning the I F on a color television
I don't know why people always butcher the rf gain pot. I for one use the rf gain control a lot.
THE BIGGIE Z it is all preference...I personally dont use my RF Gain ever..i use my volume knob but the SWR Pot is a good one to use use because you can still use the swr function.
LOL.. I think you're the first person I've ever known to use their RF gain knob. I've never used mine (except to either remove it for a different control or a mod). Why do you use yours if I may ask?
@@billybobsowbreath1774 I use my RF gain control often as well. Sometimes to cut down on background noise and jibberish when I'm driving because the squelch in my 29 is wonky. But mostly I use it when me and several other drivers are on location in the oil fields waiting to unload. We're often waiting for several hours, and 2 to 6 trucks parked side by side or at least very close to each other. I don't like being so close with a bunch of radios hammering each other and the audio is distorted from being too close as well. Hope that helps.
A lot of people don't like me I never adjust it but after I release my gk pre people will need it lol....
@@billybobsowbreath1774 thanks for the info
Ahhhhh shit! This could be useful
It has been for hundreds of people that have thanked me after following my instructions!
Why would anybody do a mod like this?
Lol lol are you being serious man??? Every tech that rubs a Cobra 29 on his bench has this done.... this is the default mod you do to a Cobra 29 so known it is hard to find anyone that has known about it. It allows you to adjust your carrier from 0 to your top end usually around 4 to 6w and you swing the same each time. For a regular user it is how you match your radio to an amp with out sending it yo a tech. I've gotten 284 messages thanking me since I did this crappy video So so many years ago cause the followed it and done it. All 3 of my Cobra 29 on my bench has it done. It is default brother. Hope this helps you understand why. You can lower your dead using this mod but making it fixed instead of a variable but wouldn't you want to have control over it incase one amp need more carrier then the other???
@@1883GotDown Is that just a variable rf output power control?
Can u help me out
off
Off?
You have a email address wanna ask ya something
Larry LeBlanc goto gatekeeperamps.com and contact me
you schematic is contradictory
Explain please
next time you film another video tell that person that coughs through the whole video next time go in the other room.
gate keeper shorten those finger nails brother
What happened to Gatekeeper? Just stop making vids about a year back..
Nope haven't stopped....just made em all private till I get caught up pal...you'll see em coming out here soon
@@1883GotDown ok, cool! I got some work for you how do I get ahold of?
@@BornAgain717 threemanpro@gmail.com
Let's see what you have...im not really taking in anything but let's see what you got and see if i can help ya some how
Holy shit. You know what you're doing modding the radio but your camera work was fucking terrible. I got car sick trying to watch. Dude seriously get a tripod! I wanna keep watching but man, video is rough :(
Awesome. I really DO like the info. Keep up the good work!
Lol thanks buddy
Your very welcome bud...If you ever feel the need to give back go check this out
www.buymeacoffee.com/Gatekeeperamps
Thanks man
So basically you destroy the f****** radio and then you give it back
nope
Nope ive done this to over 40 radios.... this is a huge improvement and a must if your gonna run an amplifier
What is the purpose of this, just to put out a dead key and annoy a channel?
No it not to anoy a channel! The purpose is so you can turn it down to 2 watts for an amp so you dont hit the amp with too much power.