#179

[@dalebrooks2396]

Hi Peter great troubleshooting! This is a first for me normally a diode is either good or open. Very interesting problem and glad the old girl is back working.

[@TRXLab]

Thank you Dale! Yeah it is very seldom that a silicon diode is leaking like this..73

[@M0XFXUK]

Another great video Peter, I really like the way you troubleshoot these radios. What a lot a lot of people don't appreciate is that the fault finding can can be the most time consuming part of repairing equipment and as you demonstrated some faults are hard work to find. I would never have guessed it was a leaking diode but through a process of elimination there it was. keep up the good work mate..

[@TRXLab]

Thank you John, your positive view on my work is very much appreciated! Always admired your professional work as well! And you are right, many people don't understand that changing a part is not the job, it is more over what it takes to find the problem. That is knowledge, experience and time. Take care mate !

[@TheRadioShop]

That repair kept us on the edge of our seats Peter. Well done on the troubleshooting my friend. Big thumbs up!

[@PapasDino]

Ditto what Buddy said! Great troubleshooting lessons for all of us, thanks Peter. 73 - Dino KL0S

[@TRXLab]

LOL sounds as you were watching a thriller. Glad that it was so exciting to you. Thanks a lot my friend

[@TRXLab]

Thank you Dino!

[@baghdadiabdellatif1581]

Thank you so much. I am from North Africa (Algeria). I am radionavigation engineer I learned a lot from you.

[@jimgiordano8218]

This was a fun one. I was guessing ahead of you, my first one was a transistor, and you went to that, then the IC test, when I saw the voltage still there my guess was a diode. I'm getting better watching you. You are a good teacher, very detailed.

[@TRXLab]

Thanks for stepping in Jim, 73

[@peterbirkin3903]

Every one of these videos are great. I really enjoy the style and the 'journey'. I have learnt a great deal. Thanks for all of this.

[@VideoRanger]

I don’t know where I could get an equivalent education on troubleshooting complex radios. Great work. Great video. Thank you.

[@fredfabris7187]

I love the fact that you’re willing to make a long video showing us your steps one after the next I really feel like I learned a lot. Please never feel tempted to cut the video short.

[@TRXLab]

glad that you liked it Fred!

[@michaelclutton8446]

You are very skilled at describing the fault and making it easier to understand thanks Peter

[@TRXLab]

Thank you Michael! 73

[@luizvision478]

BEAUTIFUL JOB. I AM PY1JW AND I AM ELECTRICAL ENGINEER SR WAS VERY DETAILED AND VERY DIDACTIC PLEASE, CONTINUE SO, GOD BLESS YOU AND YOU GIVE HEALTH TO PRODUCE MORE VIDEOS LIKE THIS . LUIZ

[@TRXLab]

Thank you Luiz very much appreciated! 73

[@hancecrawford]

Big Thumbs up that 1.67 Volt lead you a merry dance that faulty diode it was very interesting fault finding lesson those type of faults can lead you crazy :)

[@TRXLab]

Thank you John!

[@stopnwonow5044]

It's incredible that a single diode can cause so much headache. Now yes. Great research & repair. Congratulatios Peter.

[@henkvandeleur6872]

wow, another nice walk through the magical land of electronics. I followed this with a lot of interest. Thank you for taking us on this journey full of thoughts that led to the solution of the problem. thank you.

[@TRXLab]

Thanks for watching Henk!

[@bundylovess]

Nice diagnostics Peter and Another awesome repair big thumbs up 👍

[@TRXLab]

Thank you Allan 73

[@johnc4414]

WOW Peter that was a great troubleshooting video. I love your technique and how you analyze the circuits. I have learned so much from you. Please keep making these videos where you go through an analysis of the circuit to find the fault. Thanks again. John C

[@TRXLab]

Thanks for comment John very much appreciated

[@jenniferlachance351]

Well done! This is a great example of following the clues! Thank you so very much for your diligence, and your willingness to share your expertise!

[@TRXLab]

Thanks for feed back Jennifer!

[@robertcalkjr.8325]

Nice repair, Peter. I'm glad that you found the culprit.

[@TRXLab]

Yes we cough the culprit :^) Thanks for stepping in 73

[@Gorantp]

That was good. Logical thinking and troubleshooting. Looks like repairs are so easy, and we know they are not. Thanks for the excellent video!

[@TRXLab]

Thanks for watching Goran! 73

[@rangersmith4652]

Before watching the troubleshooting, my guess is a relay that is supposed to change the radio back to receive mode as soon as the PTT key or other transmit command signal ceases. Edit: I was correct about the relay not functioning properly, but my analysis didn't go deep enough regarding why it was not. Just a 15-cent diode! What a great teaching video!

[@johngulliver6151]

Another perfect repair and great commentary for all to understand. Thanks for posting Peter

[@TRXLab]

Thanks for watching 73

[@henryosuna1257]

Peter, this video is awesome. I loved the way you took us through the troubleshooting process systematically (as it should be). Can't wait to see the next one. Thanks.

[@TRXLab]

Glad that you liked it Henry! 73

[@Spookieham]

Really enjoyed this - it's helped me a lot in understanding the circuits of my little HF set

[@TRXLab]

Thank you Graeme 73

[@g1fsh]

Super video Peter very well explained. The way u tell the story is outstanding. You make it so easy to understand what is going on. Thank you Peter.

[@TRXLab]

Thank you Gary! Glad that you liked it! 73

[@karlfell3768]

One of your best videos so far. A great demonstration of fault finding skills from the master. Karl

[@TRXLab]

Thanks for the kind feed back Karl

[@TheDefpom]

Nice video Peter, excellent detail of the diagnostic process.

[@TRXLab]

Glad that you liked it 73

[@spacetimeengineering]

Hi Peter, another great systematic troubleshot. Congratulation. Looking forward to see you tackling with Sony ICF-PRO 80 with its aging issues mostly dried/leaky electrolytic smd capacitors. Greetings from The Hague

[@MAURICIOFALCAOPY5MZ]

Fantastic Peter!!!. Another Master class. Congratulations from Brazil

[@TRXLab]

glad that you liked it Mauricio! 73

[@johncliff5417]

Congratulations Peter for that fault finding and fixing the problem. 10 peneth of diode that could have caused so much more damage in many Pounds worth of other faults. Just about has bad as a faulty 10p. Electrolytic capacitor. Well done Peter. 73 de John - G0WXU.

[@ptronix]

You are the real detective! I think I would have struggled with that fault, thanks for all your videos

[@hdmalpas]

Great vidio Peter, my money was on a faulty relay at first. Show's that using a meter is the best way to fault find. 73s M3KQW.

[@TRXLab]

Yeah that was obvious in the beginning but it turned into a complete different direction..Thanks for watching Howard 73

[@OleF112]

Well, on this sunday morning it was worth 2 cups of tea spending my time to this great toubleshooting, Peter. Fine work and investigation as expected. As Buddy said, big thumbs up for this HQ video! BTW, i also have an alert from Buddy, so lets find out whats new over there ;-)

[@TRXLab]

Not that you become a tea junky at the end LOL..Thanks for kind feed back Olaf 73

[@JamesP6084]

Thank you Peter, great video as allways I am learning a bit more each time 73

[@TRXLab]

Thanks for feed back James very much appreciated 73

[@masterfranco01]

Hi Peter, thanks for the nice trouble shooting video, very clear to follow your steps. Thanks again and looking forward to the next video.

[@TRXLab]

Thanks for feed back very much appreciated

[@BobMellor1954]

Really interesting and captivating video Peter, thank you.

[@TRXLab]

Thanks for watching Bob!

[@radial9202]

Superb commentary and fault diagnostics, well done Peter.

[@TRXLab]

Thanks for comment 73

[@roygabriel.2753]

Excellent I have a very similar fault on a ft707. Whilst the circuit may not be the same it should make the chase easier I hope.

[@michael_pa4mic]

That was a nice trip you showed us! Thanks for it Peter💪

[@TRXLab]

Thank you Michael! 73

[@pd1jdw630]

How one diode can make you run down the rabbit hole to find the problem just outside the door. Thanks for sharing. 👍🏻

[@Joe_HamRadioGuy]

Great video awesome job tracing that voltage down. Nice radios they are built tough.

[@TRXLab]

Thank you Joe! 73

[@paublusamericanus292]

I could not think ahead of you at all on this one. thinking back, knowing the one diode is the front end that first gets hit, and goes bad, and it suffering, hits the next diode right beside it, one would think, looking near the one always going bad, start there first. but this looked nothing like that. good work peter. I thought it was the chip till you pulled that leg.

[@TRXLab]

Yeah very tricky especially if you think about the fact that this diode has a reverse voltage of 600V..Thanks for watching 73

[@Beretta96Dan]

Great job, Peter, on the troubleshooting! You have some very good skills, and they showed in this video. Thanks..Dan w4mnc

[@TRXLab]

Thanks for feed back Dan!! 73

[@robertrainey1728]

Another very interesting fix Peter.

[@dinosworkshop6870]

Yes it was long. But very educational. I Thought T/R switch, but I see you must dig deeper to find those pesky diodes that leak. Very well done and presented!

[@TRXLab]

glad that you liked it Dino

[@FredW-yt1ce]

Great troubleshooting Peter!! Thank you for sharing.

[@TRXLab]

Thanks for watching 73

[@ka0kuj599]

Surge arrestors! Our new radios need it. Either lightning or separate TX RX antennas got that diode. Again, a fine job OM.

[@TRXLab]

Thanks for feed back

[@coltronex]

Very well done,superb logic!!

[@TRXLab]

Thanks Colin!

[@stopnwonow5044]

16:00 I also understand the TX/RX conmmutation relay of that radio is a critical point due to how that area was projected. The fault of that component could cause that when we press TX switch (MOX or PTT) all the RF power coming from PA unit enters directly to the front-end, bandpass filter and other RX areas causing a disaster. Please Peter, correct me if I'm wrong. (And sorry for my bad english)

[@lyntonprescott3412]

Well done sir. You are a genius!

[@TRXLab]

Well I'm not really a Genius..Thanks

[@DollarbillDollarbill]

Great job. I can count on 1 hand the number of people that could fix that

[@TRXLab]

Thanks for feed back 73

[@stopnwonow5044]

2:07 I suspect the TX/RX switching relay or it's area. Some transistor may be? (at this time you had not tested with antenna tuner on..). Anyway I will seat comfortably and see if my suspition is true. Jsjs.. This Piter's video promises much entertainment and knowledges. :-) Great radio, great technician ! (I know that radio shall be repaired). Thumb up now. Cheers from Spain, Peter.

[@TRXLab]

good guessing lol

[@JimDavisWV0Q]

Peter, Another excellent video, I love your trouble shooting process. Where can I source schematics for the FT 1000 Mark V? 73, WV0Q

[@grantfullen9559]

Great Job Peter. Nice troubleshooting :)

[@TRXLab]

Thank you Grant and glad to see you! 73

[@gamlemann53]

Thank's for a good repair video I love them! The best from LB1NH Arild

[@TRXLab]

Glad that you liked it Arild 73

[@peterbatka1869]

perfect .......thank you very much for the video

[@claudioxw]

Great job Peter. Is so good see this video.

[@TRXLab]

Thank you Claudio 73

[@NoName-mr1lh]

Im glad I found your channel, it really helps. Do you have any experience with a Marconi 2019A signal generator? Im thinking about getting one to help with fault finding.

[@willhelmx8388]

Nice one Peter, i first put my money on the TX relay, was sure that i "hanged" after tx, but after seeing the 1.6v, and reset after power off....i was looking at my schematics thinking ..what on earth can cause this .. possibly the rx/tx switch transistor...but nope??....and i followed along with you with great interest... never seen that diode break down before - nice repair :-):-) 73´s / Anders

[@TRXLab]

Yeah that troubleshooting was pure fun :-) Thanks for watching 73

[@RC-Heli835]

Its amazing what one little diode can mess up!.

[@borayurt66]

Wow! this was truly a rabbit chase, well diagnosed!

[@TRXLab]

Thanks for watching

[@r.f.lab-renefilho1453]

Very nice repair as always ! Thanks for sharing this with us...! 73's

[@TRXLab]

Thank you Rene! 73

[@mrkattm]

Good case study, nice work, thanks for sharing.

[@TRXLab]

Thanks Michael!

[@chenli1460]

Hallo Peter, wie immer sehr lehrreich, nicht nur Technisch auch dein Englisch ist sehr verständlich.

[@TRXLab]

Danke Chen, freut mich das es dir gefallen hat

[@bobkozlarekwa2sqq59]

You are definitely a master tech!

[@TRXLab]

Thanks for kind feed back Bob 73

[@Stevenfclark]

I really enjoy and appreciate all of your videos 73 de N1AD

[@TRXLab]

Thanks Steven very much appreciated!

[@JesusIsLordofMybeing]

Amazing troubleshooting!!

[@TRXLab]

Thank you 73

[@berniken6511]

Nice job Peter well tracked.......Berni

[@TRXLab]

Thanks Berni 73

[@iw0hex]

Thanks Peter for sharing this video, compliments. 73s de IW0HEX Pasquale.

[@TRXLab]

Thank you Pasquale...hope you are okay! 73

[@ojjenkins7110]

Very good video Peter :-) I hate those leaky diodes, GRRRRRRRRR A good teaching video. Danke sehr.

[@TRXLab]

Thank you OJ!

[@brianwhelan5093]

Peter, long video, but you really could NOT have made it shorter, vital steps would have been missed out... Excellent fault finding as usual and it was quite exciting all the way through, like a TV detective story !! I bet you had a good sleep the night you finished this repair! Best regards as always, 73, Brian EI8EJB

[@TRXLab]

Thank you Brian! Glad that you liked it. Yeah for me it was pure fun and very exciting :^) Night was super 73

[@davidgeltz7604]

Love watching your videos.. where did you get the clips for your component tester or did they come with it. thanks

[@TRXLab]

Thank you David! Yes the clips came with the tester 73

[@joaquinnunez33]

Excellent video thanks. Can you please tell which is the brand of those cool test set leads? Thanks in advance.

[@TRXLab]

www.sks-kontakt.de/en/test-measurement/products/product?nr=9723181

[@lostlumberjacks8784]

Thanks for the great videos. Question, where do you get the schematics and service information for the different radios you work on?

[@TRXLab]

Thanks for watching. Most of the manuals are free available on the net. 73

[@roymercer6967]

Very well done, Sir!

[@TRXLab]

Thank you

[@ot7e]

Great video Peter as always, 73

[@TRXLab]

Thank you Mathieu 73

[@msaradio7455]

Outstanding! Thank you very much! drei­und­siebzig

[@TRXLab]

Thank you Justin 73

[@stefanosmakris5641]

Well done!

[@TRXLab]

Thank you Stefanos 73

[@paulcollins664]

Imagine if you didn't have a schematic to work from, you do have the patience of a Saint that's for sure

[@TRXLab]

That would be a nightmare Paul....Thanks for watching 73

[@geofham8332]

Hi, awesome Peter thanks for great video.

[@TRXLab]

Thank you Geof! 73

[@Electrolab28Ag]

Very Good Job Peter. I really love your trouble-shooting Skills. I would like to get into Radio Repairs. Can you recommend and good books or program?

[@TRXLab]

Thanks for feed-back. Well not easy with a book for its own.. It is really a lot to learn. What you need is a good mentor a lot of time and patience..Sorry for not having an easier answer.

[@Electrolab28Ag]

Thanks Peter for your reply. We really don't have CB repair guys here in our country. I am an Electronic repair Technical and I repair all sorts of stuff. What I really need to know is the basic of how to set up the radio for repairs like do I need to have the antenna hooked up the the radio before turning it on and what are the set up steps... Things like that. The trouble shooting part I can handle. Please let me know.

[@Reverend-Rodger]

Quite the mission you had there. Nicely tracked. I think you would be good at orienteering hehe.

[@TRXLab]

Yes sure but pure fun. Thanks for watching 73

[@berndreiner7159]

Sehr gutes Video Peter ☝️☝️👌👌👌 Bist du noch in Kontakt mit Paul von Mr.Carlson???

[@GaryLordsWayMinistry]

Keying transistor is bad or leaking to keep the radio from going back into receive, could be transistor or a leaking diode. or the switching transistor to the relay is staying on on the transmit section of the amplifier. Or it could go all the way back to the processor. Need to trace the circuit all the way back from the relay all the way to the first breakdown voltage is not taken away from the relay. Or you could have checked the keying section of the relay and found out why that power was still going to the relay that should have been shut off by the diode for receive. The exact problem was that the keying transistor was getting power when it was supposed to be in receive and followed it back from there.

[@BudiSetiawan-id9en]

You are very talented

[@TRXLab]

Thank you 73

[@jhorieboif5016]

good video as always,,

[@TRXLab]

Thank you!

[@Bass.Player]

Did you need to enlarge the mount hole on the PC board to accommodate the larger lead from the new diode? K5AZE...

[@TRXLab]

just a little bit not much 73

[@stevemobile1]

excellent

[@TRXLab]

Thank you

[@1flatlander380]

I wonder what the Zener would have looked like, testing with an octopus...normal or haywire?

[@TRXLab]

That is indeed an interesting question but most likely you would see a normal behaviour as the pn layer was still working

[@TheGordy1950]

Good job Peter

[@TRXLab]

Thanks!

[@DJCaverna]

Great repair my friend .. best 73 de PY7DJ - Neto

[@TRXLab]

Thank you and glad to see you Neto! 73

[@russramirez5672]

What country are you located in? Trying to guess.

[@stargazer7644]

No mention of the fact that the TX light is on constantly?

[@TRXLab]

Did not recognized that and no complain after ??

[@btouw8558]

good !

[@TRXLab]

Thanks

[@douro20]

Interesting that they are using a driver chip designed for driving VFDs.

[@TRXLab]

Yes that is true but it is finally a multi purpose device..for many applications

[@WolfgangS]

And I was so sure the IC is roasted. "Why does he still measure around, this is boring". I was so wrong :*|

[@NoName-mr1lh]

Im glad I found your channel, it really helps. Do you have any experience with a Marconi 2019A signal generator? Im thinking about getting one to help with fault finding.

[@TRXLab]

Sorry I do not have Marconi equipment so I can't tell...But in general Marconi was a reliable company back in the days.. 73

[@NoName-mr1lh]

@@TRXLab , thanks for the reply. I'll get one if I find it at a good price. I already have a Marconi microwave frequency sweeper and Automatic Amplitude Analyzer and they have been good, and still use them often.