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- Опубликовано: 28 июл 2024
- In this series of videos we will look at basic troubleshooting started from simple tips. We will also look at cheap test gear to help us along
DANIU FY3224S (FY3200S-24M) 24MHz Dual-channel Arbitrary Waveform DDS Function Signal Generator Sine Square Wave Sweep Counter:
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To Rick that commented about me not protesting the radio I was showing. One of the channel mods deleted your comments. Feel free to re-post them. Sorry about that.
When I started we were taught the 5 stages of a SuperHet receiver via block diagram, then slowly the schematic of each block was taught. We did the same for FM receivers, then TVs, then Transmitters. Once you learn the basics of one they can be generally applied to other models you encounter. The circuits are really basically the same. At least that's the way I approach working on models I've never touched before. Great job Buddy, good tutorial.
That little function generator is a nice little piece of test equipment. Thank you for showing it to us. Buddy, I am really looking forward to your basic trouble shooting video series. What a great idea! Thank you for sharing your knowledge with us. 73 DE K7RMJ Frank
Thanks Frank. There are problems with the generator due to the SMPS that is used. And that is high level AC voltage on the output jacks. I tested mine and it was fine. Should be a good series.
Great idea about starting out with Cb radios.I picked up a pile of CB's from a truck driver, cheap. Most were broken/bad solder joints from jouncing around, other loose connections and generally filthy condition. Fixed & cleaned them up, resold them. Paid for my used HF radio.
Way to go Scott!. They really have their place. And if not worth fixing there are tons of parts inside. Thanks for sharing.
Another method of learning, get free stuff and tear it apart as far apart as you can. Look at the parts ask Google questions about the parts. Then put it back together. If it was broke when you got it, so what it was free. If you fix it, big win. I got interested in electronics at 13 because I tore apart old radios and TV's and I wanted to know what those glass tubes did. Great video! Looking forward to seeing more of your approach to troubleshooting. Plus it is fun to see someone else do all the work. ;)
In my 15-20 years on and off of 2 way radio and home stereo equipment experience I have had 2 CB's with that factory glue issue.....Thanks for bringing that issue up.....
At 7:45 the FY3200S - Add a 3-prong plug. Otherwise, it will put out 82VAC on the BNC Ground Output !!! Inside, tie ALL the grounds together.
This was added in video 131 I believe. But yes great point.
Thank you for what you do and for letting us learn. Subscribed.
Thanks for the sub!
7:15 I like the little Transistor Tester. I've added it to my wish list! It will be fun to build it as well!😀
Hi Buddy, what a great platform to start with electronics. Thanks for sharing your skills and very much appreciated this side when I was learning the hard way.73
Thanks Dennis, I think it will be a fun series. Appreciate the comment my friend
thank you so much for this video, i enjoyed watching it. please continue this series if anyone will watch it will be me at least haha
No problem. Should be a decent series.
best teacher i ever seen thank you abd god bless
I have a similar unit Buddy and it works just fine for doing alignments or if you need to stick a signal into something to do some testing. I also picked up a 2.4 GHZ frequency counter for a similar price. I sure wish I had the option to get this kind of quality for so cheap back in the 70's when I started out. I remember hanging around the TV repair shop in my neighborhood back then. The owner took a liking to me and started teaching me after school in the basics. He always said he could fix 90% of everything that came in using his Simpson 260 and his Model 30 YOE. I asked him what was a Model 30 YOE. 30 Years of Experience son. Was he ever right. 73 Doug.
Thanks for sharing that story Doug. Model 30 YOE... I like it. Have you checked your unit for AC voltage on the outputs?
I did a quick measurement Buddy and got 42 volts AC from the hot side of the line to the output connector on the signal generator and 36 volts AC on the frequency counter. Probably something to do with the power supply that they are using. I will need to keep this in mind until I can go take a look at what is going on inside. Thanks for the tip Buddy you could have saved me from a bad situation there. 73 Doug.
Cool test Doug. There is one more I like for you to do. Go to your ground terminal on your outlet and to the jack and see what you get. Folks I have talked to are seeing from 82 to 120 volts. I do plan on another video on this unit and maybe a possibility to eliminate this problem. I do know the current is very low but certain parts like JFETS and FET's are not going to like that voltage.
Love your VOM stands. Might have to do the same.
They work nice. Thanks
Nice one buddy looking forward to this series as I need all help I can get lol big thumbs up
Thanks allan. I think it will be a good series of study, and a lot of fun. Thanks for watching.
Today I was as sent an AX144 which had a stack of issues, also from a truck, I did a repair video of it, showed my troubleshooting process which some may find interesting, will put it up on my channel later in the week.
Will be looking forward to seeing the video Scott.
Nice refresher Buddy; I could not help but notice that you and I have the identical Leader 250MHz frequency counter. They have been tested and found to far exceed the conservative specification that is stated, "usually are stable between 400-450MHz" a big plus in the servicing arena.
Thanks John, Yes the Leader is a great unit. Mike from Mikesradiorepair sent me this one.
Great video, enjoyed it all.
Good video I enjoyed it. Thanks Buddy
Wow, crystal pin broke off. great troubleshooting
Excellent tutorial and advice, I am not new to electronics, but my background is Audio, high power professional audio amplifiers, classic/vintage stereo gear mainly Japanese.....however, I have always been interested in RF, and I am dabbling in it now, I find your videos very helpful. You can find that corrosive glue in a lot of Sansui stereo gear from the late '70s early to mid '80s...terrible stuff....
Good to meet you Kevin. Sounds like you already have plenty of background so learning RF should not be an issue. I will do this series in the same style I do all my videos. A lot of material to cover. May even see if we can get Mike and a few others to chime in also. Thanks for watching my friend.
thank you for making these videos .......a radio tech is non existent in my town or part of the country....ive had 2 dx radios in a shop in Kansas since September of last year ....the guy is suppose to be good ......but he is covered up........gonna learn how to repair my own stuff so i dont have to wait or rely on others ......thank you so much !!!!! eric
An amazing video. I'm learning a great deal from you. I would love to see a video on say, four or five of the most basic pieces of Test Equipment one would buy to repair solid state and tube equipment, ie DVM, O Scope, Signal Tracer/Injector etc. What I would like to see, is entry-level reasonably priced equipment, which would allow one to fix most, but not all equipment and what order you would recommend these to be bought. Thank again! de KM2U
Great tips Buddy! There is also a couple of very inexpensive RF signal generators available over on eBay in the $125-$150 range that, although obviously not bench standards, at least provide signals for HF and VHF/UHF receiver testing. Actually as you point out one could outfit a pretty decent beginner's test gear suite for not a lot of money and always upgrade as their experience increases. 73 - Dino KL0S
Dino Papas
If it weren't for ebay I probably wouldn't be repairing radios now. It quite simply is one of the best resources there is for used equipment. Actually it's a great resource for everything you need. Equipment, tools, service material, training material, supplies, radios and the parts to repair them.
Thanks Dino. Yes cheap is the way to go for the hobbyist. At least until he decides to stick with it. I have seen those generators you mention and they work ok. Waiting to see if the Chinese are going to make one for 50 bucks:)
Great video my friend.
Thanks for watching
Great video Buddy. I have a similar generator counter. It's basically the same device with a slightly different face. So far, I've enjoyed using it.
Cool deal Jon. Have you checked for AC voltage on the output jacks? Interesting to know.
You mean 120 volts, or just an AC voltage of any value?
Yes mains voltage. Let me know what you find. Also there are several youtube videos on this.
I'll have to check that. I'll get back to you.
Hi Buddy,
That radio will make an excellent example for troubleshooting. I already have several pieces of test equipment, but lost my working space when two of my sisters moved back and brought all their belongings with them. I feel like a storage facility. HiHI. 73 WB3BJU
Don't you love it when family moves in? lol. Should be a good platform to start with. I have this 25, a 29 and a 148 I will be using for the series.
That was a good video Buddy. I am waiting for the big brother to the FY-3200 to get here, it is the FY-6600 60Mhz generator/counter. I have collected a few vintage CB radios to try and restore and hope to use this RF generator along with my 100Mhz scope. I look forward to the next video. N6ALT
Thanks Joel. Looks like you are on the way to getting things set up.
Greetings, Excellent video, I congratulate you, if you could make a couple of videos, showing where these equipments should be connected in the different radios to find out if they are frequency shifted, or modulated, as well as how to measure their frequencies, audio and stuff. Thanks a thousand.
Thanks for the video. I just recently purchased on of those function generators on E-Bay myself and look forward to learning how to use it.
Thanks. Have you checked for AC on the inputs yet?
Hi Buddy.. Its amazing how little it costs these days to get hold of some basic test gear isn't it. And a lot of it is pretty accurate too for the price.
Another interesting video my friend. Thank you
Kind regards. John
Yes, Wish things were this cheap when I started lol. Appreciate the comment ole friend. Thanks for watching.
Corrosive and conductive glue strikes again.
Couldn't agree more on education. So many people want to dive into repairing radios and don't even know which end of a diode is the anode or cathode. All the fancy test equipment in the world will do you no good if you don't at least understand the basics of electronics theory.
Yep, that glue got another victim. And you are right. Have to crawl before you walk.
So true.
i would suggest if if you want & love to do this kind of work'''''first start taking on line (beginner) electronic courses''''''''a few anyway'''''''then start educating yourself''''that way you get the basics of electronics before you 'dive' into the 'real' test''''then thats when the ''real fun''starts''''as you go you will learn that you should had done this '''years ago''''''''OUT OF TIME''''TUNE IN NEXT TIME''''''''JAMES.H''''OKLAHOMA.
''you nailed it ''james''''.
Nice first step video. Most people could start with just the voltmeter checking that the voltages are there. I am afraid that I need some more education on the basic design and operation of a CB. Perhaps you could do some videos just going over the schematic and the functions of different sections of this example radio? I know that is a lot of extra work and time and not a part of recording a repair that may be bringing in income, but is something that I think is missing on the electronics/repair youtube scene. Thanks!
Hi James. That is what I intend to do. Next upcoming video will be an introduction to the radio circuit. Showing the block diagram and locating the blocks in the actual radio and schematic. I did this on a website years ago and was a hit.
Me too, I've been slowly working through some simple repairs and have a basic grasp of schematics, but sometimes I get lost, then Buddy ends up making Video #126 with my radio ...
you make some very good points in this video. My hopes were to work on 2 project radios that I have in the Ham bands. Then I learned that I would likely need equipment rated for at least 1Ghz. Now I'm beginning to wonder if I should focus on tinkering with CB radios first before I put a lot of effort into getting top end equipment. 100Mhz scopes on ebay are as low as $100. 1Ghz scopes on Ebay, about $1k. By the time I learn the ins and outs of CB's maybe the 1Ghz scopes will be $100 LOL.
I never use much over a 100 MHz scope. For cb and HF it is all you need. CB is a great platform to learn on. Remember it is all radio just cb is a stripped down version of it.
Thank You for your insight and encouragement. Gotta respect that advice :-) I really enjoyed watching your Kenwood TS50 series. That was a work of art. 73
To me, a signal tracer is one of, if not the, most important tool to have...it lets you go thru each circuit and you listen to the tone..and as soon as it disappears, that usually is where the fault is...And you can do the same thing with alot of other equipment but if you just started out troubleshooting radios,,, this and a multi meter would get the job done..But aligning is a whole other subject...
I agree, and wait till we start using the curve (signature ) tracer.
Signal generator yes, To inject the signal , But a scope is also a must if you want to see the recovered signal waveform .
very nice job my friend....really good videos....
i want to ask you if you can make a good video how to tune the coils,where to messure for that tunes and all that stuff...
have a great day buddy
Hi Nik. I plan to do just that. Will start with an introduction to the radio so everyone knows their way around it. Then move to basic fault finding and then alignment. Thanks for watching.
would this be a good thing to have if i just wanted to do CB tune-ups and alignments? does it do tones?
Very good
Thanks
Will this do 2 tone for ssb?
WoW.... That little thing works out of the 24 MHZ band, hey Buddy can you use it as a Singal Generator and inject a 100 Micro Volt Single??
Hi I have a old school cobra 148 that needs fixing.can you take a look at it??
SDGMB #006 FeelTech FY3224S 24MHz Signal Generator Banggood
Shows these units are putting out dangerous voltage and current from the test probe connections. Other people have had the same problem and redone the power supply in the unit. Just type in the unit on you-tube for the reviews and fixes.
You are right William. I thought I had mentioned that in the video but it may have been edited out. I seen those videos and how one guy built his own supply board (linear) to fix the issue. I did test mine and the voltage on it is nominal. Had to do that before connecting it to my new scope!! Thanks for that concern. I will mention it in the next video.
I was thinking of purchasing one - but did not know if the problem had been fixed on the ones being produced now. Would probably damage equipment and body if not fixed. Thanks again for the informative videos.
Currently putting stuff together to try and build up equipment to begin hobby electronic repair. Have been looking for a function generator for a while but lots of them are only up to 2MHz, are these models still a good buy or should I be looking for one that is capable of higher frequency’s. I’m sceptical of cheap chineseum made stuff because of poor performance and lots of noise they create so any advice as to what is the best option would be gratefully received. Thank you.
How about a video on using your IFR 1200 service monitor to troubleshoot transceivers?
Working on that.
I don't have a function generator, would this one be good enough for testing my yard sale cb radios? Thank you for your time.
Would this be good for checking alignment of an older tube type shortwave receiver ?
I would be careful with tubes rigs but yes you can use it for that.
i have a qestion will a Agilent E4406A VSA Transmitter Tester, 7MHz to 4.0 GHz. w/60 work for cb radio repair
Hello. I just picked up the the same B&K Precision 1801 Frequency Counter and it will not adjust down to the proper frequency even with the pot trimmer (C202) all the way out. It is around 250 Hz high. So frequency 27.345.000 will only go down to 27.345.250 on the counter, and I cannot get it down to 27.345.000. Any ideas what I can do to fix that? Thank you very much. Mark
The 1801 is getting pretty old. Sounds like the crystal may have drifted out of spec.
I just wanted to touch base with you, and I thought this might be the correct way, if not, please let me know. I have a Hammarlund HQ-110A that has the IF can disease that you often speak of. I sent it to a repair shop that I was told had a good reputation. When I got the receiver back, it works, but the sensitivity is very poor. Would you be interested in looking at it for me ? There would be no rush
Do you have a clean Cobra 29 LTD Classic board layout pdf?
The one at cbtricks is terrible!
Don't know if it's still true, but used to be you needed a commercial radiotelephone license to work on certain radios like CB, public service and radios used for general commercial communication. Radios used for receiving only do not require a license, but be aware they may contain high voltages! ☠️
This has been asked many times over the past 20 years. When I worked for a General Electric land mobile radio dealer the manager had a license on the wall that we worked under. I do remember looking at it before I left the company it had been expired for 3 years. When they went out of business a local guy that was the tech bought out the business. Works on local state emergency and law enforcement radios. To my understanding he was never licensed. When I started at the EF Johnson service center the owner had no license at all other than state related stuff. I Google this when I saw your post, still no real answer was found. I did read about cb and there was several statements, one saying you had to have a "First class license to work on a transmitter, Then further down stated all internal test and adjustments had to be done on a non radiating antenna. So with that I am not going to say either way until I further investigate it. Good question.
The Radio Shop Thanks for looking into this! I'll be interested in what you find out...
I hold the GROL (incl MROP) PG, Radar Endorsement, GMDSS Op/Maint DB, and the Radiotelegraph T (Formerly T1) Licenses. These constitute the 6 commercial FCC licenses still in existence. I passed all 6 required exams in the past 2 years (also have the Amateur Extra) and the only types of radios these recent study materials and exams covered were the Shipboard, Land Based Stations communicating with said ships, Commercial Aircraft and ATC Tower radios.
These 6 licenses were intended to allow repairs of these radios in any location. We were told that while at one time, all AM/FM/TV broadcast engineers and stations had to have the GROL, this is no longer required due to the reliable automated shutdown systems in place nowadays. There was zero discussion in the material (G. West et al) about any other radios so would have to assume those are not required. I was told that I am one of less than 20 licensees in the world with all the licenses so thought I'd help answer. Love your videos!
Regards, Jim AA1JV
Jim, thanks so much for that information. And congraz for holding all those tickets!
Would you recommend buying this function generator now that you’ve used it for a while ??
It is really not a bad unit to have as a hobbyist. But if you are into more professional repairs Then find yourself a good used Tektronix, Agilent or a new unit like the Rigol.
Thank you and yes I have a hp 8657b signal generator 100 MHz counter and 100 MHz scope but I need something for transmitter allignment and was tryin to get some ideas .
SInce international crystal as gone out of business, is there any place left that will still make crystals for these old radios?
steve that is a good question. Also Jan is out of it. There is a place that is called Kens crystals but I have never done any business with him. Let me shop around on it.
MikesRadioRepair brought me over here Now Subscribed!!!!
do they make a RF signal generator like this Arbitrary Waveform generator ???
Thanks for joining in. Mikes a great guy. Actually there is a cheap one. I have heard good things about this cheap unit. Just put it in a box and add jacks, attenuator, switches. Will post the link below.
www.ebay.com/itm/0-55MHz-DDS-Signal-Generator-AD9850-Direct-Digital-Synthesis-For-HAM-Radio-DIY-/290943262590?epid=708298798&hash=item43bd91df7e:g:yUwAAOxyXTRR99h8
Can YOU do a Video of YOUR AF Output Meter YOU made and what it all does???
I will put it in the que. Thanks for the suggestion.
How long did it really take you to find that issue? Did you really just zone in on it like that?
You saw it as I saw it.
A real good channel for basic electronics is Randy Fromm on youtube.
Hate that conductive glue. To make matters worse still seeing it in newer gear as well.
Yes that stuff is really hate on electronics. You would think by now they would stop using it.
Hey Buddy,
Could you let me know if bangood sends you or comes up with a low cost
alternative to that there IFR 1200? :-) Ha...that would be great!
Look forward to your series. thanks for the videos
73
Slim
Hi Slim, That would be something eh? A cheap Chinese signal gen that covers to 1 GHz. You never know about those folks. Thanks for watching.
ha yeah. but I was talking about that beautiful IFR1200 Super S communications service
monitor you have there. That is one nice piece of gear
Oh yeah. I love the 1200 Super S. I do have a plain 1200 also but I need to do a bit of work to it. Several problems have come up in the past. The parts are not cheap either. 200 bucks for a resistor dummy load about the size of a dime. Will get to it soon I hope. As always thanks.
from what i heard. that freq counter has ground to mains. hook that to a old RXer thats none transformer. call 911.....
♥️👍
Enroll, invest and sit in a class room,you can't learn electronics on youtube,teachers get paid for that in technical schools.Other people did it back in the day.Be safe.Support teachers.
First thing (assuming you have the electronics knowledge): Get a service manual! If you can't find one, at least try to find a schematic.
I think that noisy TX is a faulty driver..