#86 Shop Talk Tripp lite power supply FT 101 update
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- Опубликовано: 13 сен 2024
- Happy Holidays to all and a safe New Year.
In this episode of Shop Talk we look at an interesting design of a Tripp lite PR 60 power supply.
Also updates on the HTX-100 and FT-101 radios.
Disscus on my site plus pictures and schematic:
gokarters.com/s...
Contact information:
gokarters.com/s...
I agree with pichacer's comment below. Two diodes in one package! Not what you have. The diodes in one device are in parallel. Years ago high capacity diodes were at a premium. Two half wave diodes in parallel gave higher amperage at the cost of more filter capacitors. After using up the old stock they changed to the more efficient full wave rectifiers. Just rewire the circuit. Love your videos.
Thanks for a wonderful year of teaching, enjoy your work very much, Merry Christmas and hope you and your family and have a very happy and healthy new year.
Thanks for putting up with me. And for the kind words. Merry Christmas my friend.
Looks like you need Mr. Carlson's new detector for the noise in the Yaesu FT101. Just watched his video last night. Thanks for all your great videos, and Merry Christmas.
I have to build one of those.
Looking at the schematic it shows a standard 2 diode center tapped supply circuit and I can see that RM1 and RM2 were originally 2 rectifier diodes in paralle connected to the outside ends of the secondary to produce the positive voltage with the center tap being the negative but someone either changed the diode packages to standard 4 diode bridges or the factory substituted them for cheaper easier to find parts. You can still use the 4 diode bridges if you don't connect anything to the Neg. terminal.
Correct. Those diode units were changed out by someone not knowing what was there. And instead of following the schematic it threw me off.
I see it was fixed in a later video so good going.
Merry Christmas
And a very Merry Christmas to you.
This was a good one to watch, I came in late to the game but I did conclude that the schematic was probably correct and that bridge was not a bridge rectifier. But man oh man what a strange design specialty of a diode pack... Add this to "just when you think you've seen it all" category. Merry Christmas everyone.
LOL Craig. Yep it blew my mind. What threw me off was the already wrong components installed. Live and learn.
It looks like propriety bridge diodes that tripplite is using. Some one may have replaced them with regular ones thinking they can get it running. Marry Christmas to you and your loved ones. Look forwrd to your 2017 videos. 73 for now.
That is the big thing that threw me was there was standard 35 amp bridges in the circuit. If I had seen the originals may have picked up on it. Live and learn I guess.
I also wanted to point out that the TWO BLACK WIRES on the secondary ARE the center tap of the transformer !! and that the designation of A and B on the modules most likely denote DIODE A and DIODE B the two + signs indicate the positive side of each diode !!!! ---------------- John a Bellas ------------ MERRY CHRISTMAS Buddy and Happy NEW YEAR ALSO !!!Take those newly installed bridge rectifiers out and install some real heavy amperage diodes in there.
Yep, Sue above pointed me in the right direction. Guess I had my blinders on today. Really threw me a curve lol. Have a Merry Christmas my frend
merry Christmas buddy, glad too see all is well with you. also glad to see the 101 update lol.
Thanks Justin.
Hello Radio Shop and fans! A broken Tripp Lite PR40 had me stumped. The riddle is the two rectifier blocks are "full wave bridge parts" but are used in the Tripp Lite PR40 here as "just a giant" diode. ie the four internal diodes in the block are just like one big diode . See if my video here makes any sense: ruclips.net/video/Mzec5ykVzSU/видео.html The two blocks on mind DO buzz out as "full wave 4 diodes in a block" parts, but the catch is the device is not used in the Tripp Lite as a full wave rectifier. The two blue wires from the transformer are in parallel, and the two red/orange are in parallel too. The PR40 here was bought as a junker at a ham radio swap meet about 2 years ago as a broken supply. Tripp Lite sure does not want to share a schematic, so the power of youtube etc helps the repairs. Regards to all
Thanks for leaving the link to your video. Explains it very well.
I'm guessing that the RM1 and RM2 refers to "Rectifier Module 1 and 2" Referring to your schematic I would guess that these contain 4 diodes each. These would be wired internally such that there would be two positive outputs for two AC inputs. Not a standard bridge configuration.Basically they are using the internal doides in parallel.
e wires from the taps on the transformer have been incorrectly connected. The wire from each tap should go one to one rectifier and the other to the other.
Your guess right!. All but these are two diodes per pack. Don't you love working on something that someone else changed stuff in..... Thanks for you comment.
Yea hat power supply had me baffled and my personal P.C. "My GREY MATTER" had to really work on that confusing situation!I almost had to reboot my brain on this one HA HA Ha so don't feel bad Buddy, we all have fog in our grey matter at times!!
Threw me for a loop for sure. But now I see clearly :-)
Maybe those blocks are half wave heavy duty rectifiers.
It would make more sense if it was just two Parallel diodes.
You are correct MrMac. Those were not to be bridge rectifiers but dual diode packs. Sue stepped in and got me straight on that. No idea why I did not see this in the beginning.
The Radio Shop
Love your Videos.......
Merry Christmas buddy.
Cheers..
Thank you MrMac. It is my pleasure to have you here. Merry Christmas and a happy New year to you.
The Radio Shop
Thanks......
The only twin power diodes I've come across in that sort of package, are the 4-Pin ISOTOP variety. Which aren't that cheap.
Yep. And these are rare and hard to find
Mouser has it it listed as a "Renata Power Module miniature vertical", custom order part, number 700101 made by Renata. Does not appear to be a rectifier.
Merry Christmas, and happy new year
Merry Christmas to you Sue. Hope Santa brings you a ton of radios :-)
I agree with Steven Moore below. Each Rectifier module contains ONLY TWO SEPARATE DIODES, That would make sense with a center tapped transformer. That center tap would then be the negative side of the supply. The two diodes in each module must have real heavy ratings !! They are NOT a Standard 4 diode bridge for sure !! ------- John Bellas
I do agree with that.
I agree with the double diode, so obvious after someone else sees it first BTW Paul at mr carlsons lab has built a sensitive non contact probe just made to find the noisy component in your FT 101
Yep, still do not know why I did not pick up on that. Over worked I guess. Yes saw that probe he made. Going to build one also
I have a smaller tripp lite power supply that has the same problem and could not figure out what is going on in the bridge rectifier circuit. I could not find a schematic for my model. It is under the workbench still apart for the last 2 years. Hope you post an answer to this problem that I just gave up on. I love the video's and am a FT-101 fan myself.
another entertaining and thoughtful video, Merry Christmas & Happy New Year!
73 Tom KY4TD
Thanks Tom. And a Merry Christmas to you
Hi with the Ft101, I would look at the IF filter's ,ceramic filters as this happens with a lot of radios
Dave Browne 2E0DMB
Hi Dave. Yes this can happen. I never seen one go bad in the 101 but is possible, Thanks for the tips.
I found an identical schematic and the mfg was YOUWON ENTERPRISES LTD. It probably should have read YOULOST ENTERPRISES LTD. (Another relabeled piece of Chinese junk). I also found a note that indicated four bridge rectifiers were used to repair the unit but no wiring was indicated how the bridges were configured.
Looks like half wave rectification through he bridges, don't forget the voltage is relative to the common, so bridge isn't necessarily + and -
Found they are not bridges that are suppose to be there. Should be a dual diode pack
The Radio Shop - I think if you pull off the - from the rectifier, that will act like a dual diode, and allow you to test.
Hmmm, interesting idea!
There is one for sale on e_ay. Maybe you could contact the seller and see if he could send pics or copies of any documentation, users manual, etc.
Found the manual. Not much in it. No parts list.
Merry Christmas to u and your Family Buddy hope u have a good one
Thanks Gary, we are having a great time. Merry Christmas to you and yours.
Same from NH!
Merry Christmas Buddy, if you cant get ps running no one else can My idea is special diodes
Same to you Dennis. Yep, I can strip it and make my own :-)
I think I will stay with my astron 101 is looking like it's going to be a nice radio
Astron rocks. Yes the 101 looking better.
Merry Christmas to you,many thanks for all your efforts and videos. Seems like I learned from one of you repair guys that a radio that produces lightning crash noise on its own is suffering Silver Mica Disease,is that possible on the FT- 101 ?..
Merry Christmas to you also. Yes the 101 does suffer from SMD but not in the form od IF cans ect. They used a few molded mica capacitors that are rectangular with the dots on them. They go bad quite often.
Hello Buddy , WJ5F Ron I have one of these PR-60 p.s. had the same double take on the rectifier it,s a house tripp lite not a bridge have not found a replacement yet. Hope someone has some more info.. Thanks for your shows...
Hi Ron. Yes I found that out. It is a bid dual diode pack. Since thee were bridges installed it really threw me off. Thanks
It looks like your mystery devices are p/n 70CT01P which are as elusive as left nostril inhalers. Maybe you can source them? Still researching.
Steven, great information. Will look them up. Thanks
this now sound like all my radio with that noise , my neighbours both to my left and right just install wireless fence for their dogs , this is all hell .
Man I hate to hear that, I have a solar farm down the road. S3 to S5 all the time.
Just hook up some AC to the AC terminals and see what comes out of the +and - terminals?
All ready repaired in the following video. Thanks.
Bonjour, je suis a la recherche pour mon kenwood r1000 du circuit d'affichage msm5524, auriez-vous ce composant de disponible ?
QMC, Buddy. I had a similar problem with a KWM-1 with the noise. It would start ok when turning-on, then the noise would begin. I used some freeze spray and isolated it to a silver-mica cap, which must have had silver mica disease. Does the noise start right away?--John
This noise is there about all the time. Just comes and goes in volume.
Hi buddy what type of IF can does the Ft101 have do that have the silva mica wafer in them ? Silva mica disease. Ps merry Christmas to u and your family
That is the beauty of the 101. None of the standard IF cans like in other radios to deal with. Merry Christmas.
Buddy; First things First, Merry Christmas.... Now if your trying to confuse me you didn't have to go this far LOL. I am picking up what your saying about the ground. I have a question for you, Setting up a soldering iron does the tip go all the way down until it bottoms out and then tighten the screw?. Or 1/4" off the bottom of it bottoming out?. I thought I'd ask you a question in hopes you'll answer it. Thank you for your anticipated answer. Apprentice: Angelo
Thanks and a merry Christmas to you my friend. This supply was a nightmare but have it figured out now. What brand of solder station is it? What you ask can vary from different manufactures.
Good morning !! Buddy: Ok the soldering iron is from Harbor freight, I think 30 watt, Brand is Chicago Electric. I purchased this some time ago. I lost the directions. Do you or did you ever have an experience using this ( **** ) in the past. Thank-U.. Angelo.....
When you going to get back to the FT101 radios ?
thanks buddy i enjoy watching your videos,have a great christmas and a great new year
kj4si
Thank you Joel. Merry Christmas my friend
That is not a bridge rectifier, it is a dual diode module.
That is what I wanted to hear. Thanks Sue. I guess the ones that were installed is what through me for such a loop.
The the heavy black wires is the center tap
Those dual diode packages use to be common in the seventies. So all you really need are a couple of big stud mount diodes and mounting hardware.
Yep I can see that now Sue. Appreciate that. What I cannot find is a replacement. Trying to find a datasheet on the 70CT01P so I can see how it is designed inside. Might be able to rig something up with some 35 amp stud mount diodes.
It is doubtful you will find a replacement.. You are going to have to get creative and find some fifty amp diodes and use them. you really only need one per side.
Hi Buddy- Didja figure out the weird voltage readings on the 101 you reported some months ago? -Bob
Yes, it is due to higher than normal line voltage. So always check that.
Thanx Buddy. I put my 101 on the Variac at 117VAC & still get 700VDC at the 600VDC test point. I also found that RL1 was dirty and the problem for lack of: receive & 60Ma of bias. I'll be doing the alignment soon.
I have 1 of these, and have a question. The output on mine is 12.7v I plan to hookup sensitive equipment with mine that is rated 13.8v. Is that lower pot adjustment for the voltage output on the regulator board? Thanks.
Merry Christmas. I think the 2 blue wires from each xformer lead should go to different rectifiers, not both to opposite sides of the same rectifier. Cant help on the rest. Thanks. ..................Dick
What I was thinking to begin with until I saw the posted picture on the internet. Merry Christmas my friend.
If it was then would have been a long time ago. The picture is so clean, the one I have looks like it was drug behind a mule lol.
Have you tried the 3n211 for 3SK40 transistor swap in the RF front end of this unit? I'm curious about it, as well as a fix for the noise.
Yes I have tried those transistors. Sort of hit and miss
Your Bridge Rectifiers are connected on one tap.
Yep. And the ground is from the center tap.
Strange. I don't see how this could work.
I see it now, Sue cleared it up. Not made to have bridge rectifiers but a dual diode pack. Ground is via the big black wires on the center tap
It looks to me like your power supply is just a simple Full Wave Center Tapped Rectifier which is using the Rectifier diodes in parallel rather than as a bridge , to give you more current. The pass transistor circuit looks fairly standard for high current supplies. Interesting. I am going to do a little research on this. Merry Christmas!
Thanks Stephen. I am not familiar with the way this is designed at all. Very strange. I do know the way it is wired and how the schematic shows gives me a dead short. Your research would be appreciated. Looks like S Robins beat everyone to the answer, Very interesting how they used diodes.
Triplett has a habit of using In house parts. Our company had one and we gave up on fixing it. That is why our company never bought a second unit. The way they wire it is just horrible.
Yep, not the best that I can see in a supply. Thanks
windows 10 I presume?
Windows 7. Just did a test video. Found the location of the problem but not a solution
The Radio Shop hmm I have had that issue, the video was good but after I put it on youtube it did the same thing
Engineering was drunk that day?
A diode bridge with NO negative and two positives? Good luck constructing that one!
My money is on severe inebriation !
Paddy
I am off this weekend I will try and find it for you , the display
Thanks Danny
that is confusing
Agreed!
Tripp Lite Quality Control is poor.
Agreed
Merry Christmas
Merry Christmas my friend
Best wishes and a Merry one for 2017!