#245

Fixing a radio with a prior repair attempt

[@tomnorman5461]

Peter, your professionalism is exemplary! I really wish there were more channels like yours on CZcams. I learn so much from your videos, I feel like I should pay you! Great Job as always!

[@TRXLab]

Thank you very much appreciated!

[@extreme978]

You are a credit to you tube. I wish you lived close to me, i have a lot of equipment that needs fixed. Here in usa, its hard to find a good repair man. Your videos are so entertaining.

[@TRXLab]

Thank you very much appreciated

[@johncundiss9098]

Previous tampering by an owner can bring you down. You have to fix what they did before you can fix the original problem. Good video, thank you.

[@TRXLab]

yes it is challenging

[@OctavMandru]

Oh Peter, I envision a "tech" with his rusty soldering iron with corroded tip -of course-, fumbling inside the nice radios.
What a nightmare.
Ok, I am awake now 😊
Thanks for your videos

[@TRXLab]

LOL yeah true

[@donalfinn4205]

Genius at work! Peter makes it look so easy. I almost think I could repair it myself! Well done.👍☘️

[@TRXLab]

Thank you

[@robertrainey1728]

Lovely to see this classic radio brought back to full working order. Thanks again Peter for showing the repair.

[@ianxfs]

“That is definitely not factory”…. very politely put Peter 😁

[@TRXLab]

always be respectful to anybody that is my maxim

[@billnicholson2470]

Amazing what you may find from a previous repair. Lucky that bridge didn't short anything out just rattling around in there. Very thorough repair. Thanks Peter. De KB7ICI 73

[@TRXLab]

Yes the owner was very lucky

[@W6EL]

Reminds me of my early-serial IC-2300H, which did not have the final amplifier grounded from the factory! They forgot to unmask the PCB around the mounting screws.
Great video! 73, de W6EL

[@TRXLab]

Thanks for watching

[@Radiocruncher]

Well that was an easy fix in the end. I was convinced it was that damn Mitsubishi module. Nice logical path to find it and also nice to see it performing in the test set. Regards Graham

[@TRXLab]

LOL yeah in the end it was easy and it could have been everything. Thanks for comment Graham 73

[@Joe_HamRadioGuy]

Another great explanation. They're lucky the radio protected itself with the high swr or they may be replacing another power amp.
Thank you for sharing with us.
Happy New Year's to you and your family 73

[@TRXLab]

Thanks for watching and all the best for 2022

[@w.rustylane5650]

As always, another great video. And once again, the golden screwdriver strikes and leaves his mark. It looks like an amateur (not ham) tried to fix the radio and didn't put all the parts back where they go. So that fixed the radio? Unbelievable. 73 from W Rusty Lane K9POW in eastern Tennessee

[@andybonneau9209]

I thought for sure this fault would have been related to an overloaded front end: static discharge, transmitting into the reciever, etc. This was a fault located between the ears.

[@TRXLab]

yeah everything could have happened...

[@Joe_KS1I]

Great job in finding the fault Peter.

[@TRXLab]

Thank you!

[@sylvainbel]

Merci pour ce partage , une fois de plus on voit qu’il faut toujours laisser nos radios entre les mais d’un professionnel 👍

[@extreme978]

Ces vidéos sont tellement divertissantes que je pourrais le regarder toute la journée

[@TRXLab]

sure definitely a good idea

[@berndb.5097]

That was funny. Reminds me of the technician who always has something left over after a repair and wonders what they were for.
But I have never seen that such left over parts are simply sweep into the device and the case get closed.
Simply clever 🤣🤣🤣

[@TRXLab]

lol yes you are right

[@TheMaddogronh]

Thank you for another fine video !!
There's nothing I like better than waking up and watching your videos,,, it just starts the day off right !!!

[@TRXLab]

Thank you..

[@michaelcornet506]

This guy is lucky that not blowup the thing.
Thank you as always good information.

[@TRXLab]

Yes you are right

[@dl7majstefan753]

First i thought that the fault is at the TX/RX switching diodes, faulty diodes may generate noise. But the real fault.... i have no words for it.
When unscrewing and unmounting any equipment it is ALWAYS recommended to collect all screws, washers etc. in a small box to check at the end of the work, if anything has been left.

[@TRXLab]

Yes the outcome was a shocker..All the best Stefan!

[@RICKY_TECNO_RADIO]

very very thanks, Peter!! so clear! go ahead! Saludos desde Argentina!

[@andrewjbuckley]

I would love a week with you learning how to repair radios

[@TRXLab]

thanks for the honour!

[@bblod4896]

Interesting diagnosis Peter. Thanks for sharing and have a pleasant Sunday.

[@TRXLab]

Thank you

[@andrewwaterbury7782]

I find radios very interesting and these videos are the best on CZcams,keep up the good work Peter.

[@TRXLab]

Thank you

[@montygore1200]

nice video peter. your video quality is very good these days

[@mikefinn2101]

Peter your one of the best always enjoy videos top notch expert

[@TRXLab]

Thank you

[@mikefinn2101]

another great video from an expert well done

[@TRXLab]

Thank you

[@charliem.9998]

yet another top video by Peter and Olaf ... great guys with enormous knowledge ... hats off, fellas ... 73s de DL6RDE / AA1KD, Charlie

[@TRXLab]

Thank you Charlie!

[@iw0hex]

Thanks for sharing this video Peter, nice work !!! 73s Pasquale IW0HEX

[@TRXLab]

Thank you my dear friend

[@jurgentraude4365]

Excellent video Peter. Keep up the good work and the very best for the New Year. Thanks!

[@TRXLab]

Thank you

[@michaelclutton8446]

Thanks for the video Peter, very clear explanation of the repair. You are a FB teacher regards Mike G4VQH

[@TRXLab]

Thank you!

[@dennisqwertyuiop]

great work as always

[@TRXLab]

Thank you Dennis

[@elcomode]

I've used this radio as a packetradio transceiver for many many years. Daily a lot of activity on my Gateway from 2m (1k2 simplex) to a 70cm (9k6) Digipater next to me. But in time, the power module f..ckt up and has to replace several times. Afte some replacements, the loosen contacts are unable to solder. It was time for a new trx... Peter, it is a FT-212 RH (not RM) vy73 DF2EAN Frank

[@TRXLab]

Yeah the cooling is insufficient on this radio and Yaesu always tended to do so.. Yes you are right it is a 212 RH.. Thank you

[@elcomode]

@@TRXLab As I wrote, the TRX ran continuously 24/7. After replacing the PA module, I've added a small fan to the heatsink. In addition, a 40°C temperature switch (normal open) from a washing machine (spare part). The fan would turn on above the temperature and turn off below. It worked very well for years, despite the high load from packetradio. If someone retrieved data from the 70cm 9k6 side (e.g. mailbox), it took some time on the 2m 1k2 side. So the FT-212rh was in use a lot. After a long time, the PA module broke again and was replaced with a similar 30w module. but that broke again. A short time later I moved and packet radio does not work at the new QTH.

[@TRXLab]

yeah under that conditions it is really hard work for the radio..

[@BalticLab]

Sehr gutes Video, wie immer!

[@TRXLab]

Hi Sebastian, danke! Hoffe alles okay bei dir! Alles Gute

[@BalticLab]

@@TRXLab Alles super bei mir, bin wieder in DL, in der Nähe von Kiel. Das Nervigste ist im Moment Geräte für ein neues Hobbylabor zu beschaffen 😫 Aber das wird schon. Gruß, Sebastian

[@Pnut-qd4em]

I was thinking it was a shorted switching transistor or diode ,but it was grounding!

[@TRXLab]

yeah that could have been...

[@Alberto_Alletto]

Good Job ! 💪

[@TRXLab]

Thank you

[@RGB06084]

Thanks Peter!

[@TRXLab]

Thanks for watching

[@urbanbushcraft3018]

Great video as always thank you.
Out of interest what did you use to clean the heatsink please?

[@TRXLab]

Thanks for watching. We use isopropanol alcohol to clean those items

[@chickennugget3362]

Yay, I got my saturday fix! Thanks

[@TRXLab]

glad to hear that!

[@RICKY_TECNO_RADIO]

25:33 !!! the magic was done! jajaja

[@Bass.Player]

Strange to see that filter cap inside the radio. I would have mounted that externally on the vehicle if I needed it?

[@TRXLab]

well still not sure if it is for a reason original is or a diy project..

[@Bass.Player]

@@TRXLab I always thought is was an add-on... The factory did not do that...

[@cornelishummel7987]

hhaha genius intro always greetz from holland

[@TRXLab]

lol

[@bomberosmeridatimotes954]

greetings friend, can you teach me how to program that radio? for a repeater frequency. 138.25000 rx 149.25000tx tone 151.4

[@Drforbin941]

Peter, I know your German, I am as well. Is there anyway you can give me any advice about immigrating to Germany?

[@TRXLab]

no sorry do not know enough about it

[@AECRADIO1]

MOST R.F POWER AMP MODULES ARE SEVERAL AMPS ON ONE CERAMIC DIE, USING DRIVE FROM THE RADIO TO SUPPLY THE SIGNAL TO GET THAT R.F UP TO THE 25 OR 40/45 WATT OUITPUT LEVEL.

[@nr3rful]

I always wonder if the person that worked on the equipment before you, watch your video and feel embarrassed...

[@TRXLab]

I have no idea as I don't know if it is seen...

[@AECRADIO1]

THE MODULE REQUIRES A MAX. INPUT OF .6 WATTS, FOR FULL OUTPUT @ 13.8V.

[@AECRADIO1]

WHY IS THE OUTPUT COUPLED TO THE GROUND OF THE R.F CONNECTOR?
SOMEONE FIDDLED WITH A GOLDEN SCREWDRIVER!

[@tortsen2]

gerne fallen auch die tantal an den Spannungsreglern aus

[@TRXLab]

tantal C sind immer nice

[@Dawnseeker2000]

Wow, a thirty-year-old mobile...

[@TRXLab]

and still working quite good

[@AECRADIO1]

TO ME, .25 uV IS A DEAF RECEIVER. SWEEP TUNE THE RX SECTION AND REPLACE THE RF AMP AND ADJUST THE STAGES, BUT FACTORY 'STANDARDS' ARE NOT THE GENERAL RULE. I ALWAYS TRY TO GET THE BEST SENSITIVITY THROUHOUT THE ENTIRE RANGE OF THE RECEIVER.

[@gerhardvanwykzs4rum685]

Playback speed of 1.25 thank me later

[@TRXLab]

you are right

[@gerhardvanwykzs4rum685]

@@TRXLab i love your videos and you vast knowledge and the good English i just find it easier to follow at a bit of a higher speed i meant no disrespect towards you or your work keep the videos coming love it from south africa

[@TRXLab]

No worries I got it right with higher speed it is much better

[@AECRADIO1]

PIN DIODE/S MIGHT BE DEFECTIVE.

[@oldavguywholovesRCA]

First!
I win!

[@TRXLab]

lol

[@AECRADIO1]

TOO MUCH SILICONE GREASE CAN INCREASE THERMAL PROBLEMS AND AFFECT OUTPUT. LOOKS LIKE THE PERSON GOOPED IT UP.
THIN APPLICATION ONLY, THE MORE USED, IS DETRIMENTAL TO STABLE R.F OUTPUT.

[@AECRADIO1]

POORLY TUNED RX SYSTEM.