As always, your Vid's are interesting informative and fun to watch. It's nice to know in a planned obsolescence world there is still hope to keep these rigs going. Great work!

@TRXLab

8 жыл бұрын

+tim jones Thanks for your feed-back Tim! All the best and Cheers

A brilliant video yet again! Just the right amount of detail! Sehr gut!

TRX Bench: Your explinations are extremely clear to understand!

Nice work Peter with a great explanation. Thanks for taking us through it

@TRXLab

8 жыл бұрын

+Radiocruncher Hi, thanks for watching and feed-back. All the best and Cheers.

This is a very nice radio and its great to see it fully repaired for many years of happy service. It was also nice to see that you were able to obtain refurbished parts at a fraction of the price of the original part. Good all round repair.Thanks for making the video and sharing it with us.

@TRXLab

8 жыл бұрын

Yeah the refurbished finals are doing a good an stable job. Thanks for watching 73

Another VERY good amateur radio (HAM) repair. Explained so well, and in depth, that a service manual could NOT have done better. Warmest regards Wayne and Nina.

@TRXLab

8 жыл бұрын

+Nina Evans Hi Nina, thank you for your nice feed-back. All the best and 73

Astonishing idea of refurbishing transistors! Amazing and what a price difference. Great job Peter. One very happy customer I imagine.

@WokeYtube

Жыл бұрын

What you think it would last used transistor?? And separate bias wond do much as one will work harder then other and will die soon.. Matched set is MUST

Peter it is amazing at the cost of Transistors from another supplier such a difference cost another success story :)

Ted, PD5TA Great and very clear explaination. You explains what you do in a good build way. Thanks a lot.

@TRXLab

6 жыл бұрын

Thanks for the feed-back Ted! All the best 73

Another Excellent repair on how to trouble shoot Amps and the most important tip I was totally unaware of, was refurb power transistors, Great Info! Thanks Peter, 73's Lloyd

@TRXLab

7 жыл бұрын

Great that you like it Lloyd. Thank you 73

Good job. When I set FET bias on push-pull, I set idle currents to match first, then tweak to null 2nd harmonic (and other even orders)

Hi Peter It really was a three legged fuse!!! Thank you for an other brilliant video-take care

@TRXLab

8 жыл бұрын

+Nut Lock LOL yes you are right as legged fuse..:-) Thanks for watching 73

Another great repair explained in detail. I used Lilly electronics a few weeks ago for a high dollar transistor and it worked just fine. I usually don't like to use used/refurbished transistors but the customer was hurting for money and said he would take a chance. I would buy from them again.

@TRXLab

8 жыл бұрын

+MikesRadioRepair Hi Mike, yes I agree I don't like it, too. But the price difference is so huge you can't resist and finally this pills work. Thanks for watching and 73

Very interesting repair, Peter. I purchased from Lilly Liu a few months ago, and the power transistor worked perfectly. I would not hesitate to recommend her. Glad to see you got the club's radio going again. 73...Dan

@TRXLab

8 жыл бұрын

+Beretta96Dan Hi Dan, yeah Lilly seems to be a reliable supplier hope that it will be continued in the future... Thanks for watching 73

Really nice repair Peter. Good detain and explanation of what is going on. Good job. I have had . some good luck with that supplier. Glad your net is up my friend and thanks for the mention of my channel. 73

@TRXLab

8 жыл бұрын

+The Radio Shop Thank you Buddy! It was a good tip on Lilly thanks again. Take care my friend. 73

Good job as usual Peter! Matched FETs remind me of having to install matched 6JB6 finals in my Drake T-4XC transmitter. Drake had a jig set up to match them on their production line. I think it was Dave Jones in his latest video mentioned a friend of his describing a tube as "...a FET with a pilot light!" ;-) 73 - Dino KL0S

@TRXLab

8 жыл бұрын

+Dino Papas Thanks you Dino! Yes the Drake T-4XC is still a fantastic transmitter. The pity is that this matched tubes are getting more and more expensive.. LOL yes it was Dave with a pilot light :-) All the best and 73's

Another great video, Peter.

@TRXLab

8 жыл бұрын

+Gregory West Thank you Greg! 73

Oh boy, another Yaesu repair. I love Yaesu radios especially since I now own a Yaesu 991a. I just hope the manufacturers used enough heat sync paste so the finals won't burn out. Seems this is a common Yaesu manufacturing problem. It seems that vertical channel MOSFET's are quite expensive to replace. I'm trying to find finals for my Yaesu FTM-3100. I hate when parts become non-obtainable. Buddy is another great technician from The Radio Shop. I watch a lot of his videos as well. Once again, another great video. I can understand the necessity of replacing two MOSFET's at the same time but it is cost prohibitive. Cheers & 73 from W Rusty Lane K9POW in eastern Tennessee

@TRXLab

Жыл бұрын

all final transistors are really expensive

Bit late I know, but I would loved to see you solder that power transistor in. Exciting as it is to watch and listen to you on the trail of the faulty component I equally love to watch you solder them in. I want it all don't I, ha.

Great work as always thank you for video

@TRXLab

8 жыл бұрын

+DENNIS N Thank you Dennis, always glad that you like it! 73

i learned a lot from your video. thank you!

@TRXLab

7 жыл бұрын

Thanks for watching 73

Excellent video. A comparison of the spectrum between A and AB operation would have been interesting.

Great job there Peter.. Wow those are some really expensive transistors. glad you managed to find some suitable ones for a fraction of the price. Cheers friend John

@TRXLab

8 жыл бұрын

+orbiter8 (John) Hello John, yes pretty expensive for a transistor but this types are by far not top end of possible price for a hf transistor.. but we are happy to get it managed for an acceptable price.. Thanks for stopping by my friend Cheers.

bestes Fachwissen, kombiniert mit vorzüglichen handwerklichen Geschick ... ich freue mich auf die Reparatur meines FT 897 durch TRX Lab ... 73s de DL6RDE, Karl-Heinz

At the end you used the computer screen to use a piece of equipment , I wanted to verify what I remembered you used for that , I thought you got a Signal Hound for that ? I also saw your video on the LP-100A , which confirmed to me to get one of those , I lucked out and found a dead one for reduced price and repaired it , another great piece of gear . Thanks again John

@TRXLab

8 жыл бұрын

+KD0CAC Hi John, yes that was the signal hound and the LP-100 is a fantastic meter great that you was able to get one... All the best and 73's

great job as usual

@TRXLab

8 жыл бұрын

+danny blackhorse Thanks Danny!

Great repair video Peter! Those transistors sure are pricey. I understand them not being able to spend the extra money for a matched set of transistors, but on such a nice, high-end radio I would have save the extra money to do it right. But the individual biasing controls are really nice. I really enjoyed this video and always learn so much from watching your videos. Thanks so much and 73! de Nick N9SJA

@TRXLab

8 жыл бұрын

+Nicholas Hyer Hi Nick, yes fully understand that you would like to get it right.. But this pills are really expensive.. Thanks for watching, I'm glad that you like it. 73's

Hello ! Nice repair. The refurbished transistor looks more like it was taken from some other equipment cleaned and re-sold. I am not believing that it would be cheaper to do any repair inside the capsule than building a new one. The great thing is that this radio can have separate bias for each one and that saves a lot of money in repairing because most of the time only one of the finals is damaged. 73 and good luck in contest operation with it.

@TRXLab

8 жыл бұрын

+CT1ELP HiPedro, yes I believe you are right..They cleaned it and put a new label on it..The Bias control is really helpful.. Thanks for watching 73

Hi Peter, An other greatvideo showing how to repair the final stage of a very nice looking piece of gear. 73 de G0WXU -John.

@TRXLab

6 жыл бұрын

Glad that you like it John! Thanks for watching 73

Great video good job.

@TRXLab

8 жыл бұрын

+wade hicks Hi Wade, thanks for watching 73

Wow, that is one expensive transistor! Good job on the repair.

@TRXLab

8 жыл бұрын

+VoltLog Hi, yes these RF pills are sometime very expensive especially when it comes to hight power. Thanks for watching and feed-back All the best and Cheers.

well done it shows refurbished transistors are just as good big difference in cost think how much money saved worth taking a chance peter another success :)

Genius, thank you!

@TRXLab

6 жыл бұрын

Thanks for watching 73

Nice job. Thanks.

@TRXLab

8 жыл бұрын

+Robert Calk Jr. Thank you Robert! 73

Nice job

@TRXLab

8 жыл бұрын

+allan mitchell Thank you Allan! 73

Hi Peter,Good job. I'm wondering why you set the final current to 3A in a-Class mode?The service manual says 5A +-0.2A. 73, Luc

Great Peter !!! 73s de IW0HEX Pasquale

@TRXLab

8 жыл бұрын

+Pasquale IW0HEX Hi Pasquale, thanks for stopping by. 73

ok, I have the ft 1000 mp, not the MV. It has 3 3133 transistors. On the top of each one there is a diode which has heat sink compound on them attached to the case of each transistor. which has hardened. is that normal?

Do you know how much drive the the final amp requires for full output?

Very good video! How much would you charge for such a repair? I’m considering the purchase of such a radio and wondering if I can afford to maintain it.

Another very nice repair. Good explanation why you should always replace two final transistors. The extern powersupply is a good safety measure and a very helpfull tip. I noticed at timestamp 26:25 when you test both transistor current that the powersupply went into current protection and the voltage went down from 30V to 23V. Was this on purpose? I was interested what the class A, against normal mode, would produce on harmonics and IMD. Maybe a quick test is in order? Maybe other manufactures incorporate individual bias current settings. The refurbished transistor is another good solution but you have no guarantees. I enjoyd it very much and like to see more in the future. Best 73 FEY

@TRXLab

8 жыл бұрын

+FEY Hi, no it was not on purpose it was still adjusted for on transistor current and with both it simply went into protection..Yeah should have taken the measures in AB operation as well.. Okay next time :-) Thanks for watching 73

Enjoyed the repair video very much thanks. The thought of being able to buy remanufactured rf transistors is a great idea and the difference in price is huge. Have you made any more trials on the Flir infrared camera add on?

@TRXLab

8 жыл бұрын

+mac theknife Hi, thanks for watching! Yes the price difference is huge so we take the chance.. Nothing really new with the flir no real hidden short yet... 73

Nice work. I enjoy your videos. 73's de ae5yc

@TRXLab

8 жыл бұрын

+Herb Fields Hi Herb, thanks for feed-back, glad that you like it 73

I am late to finding this video Peter, I know the bias current was originally 5a per device in Class A, I think that killed a lot of them, interesting to see you set them to 3a. I guess this is a revised figure.

Your videos are a great teaching tool for electronics lovers. I enjoy them very much. This video started mid-repair in that we didn’t see the troubleshooting at the beginning. Did this radio have just half RF output or did it not work at all? What were the symptoms? Thanks and 73 Paul W5GPA

@TRXLab

6 жыл бұрын

Thank you Paul! Well this radio did not transmit that is the story....73

hi peter,how you has connected your spectrum analizer to achieve 60.0 dbm in the top of the screen.i have seen only a block dc at the input of the spectrum analizer.thank you for your master classes.

@TRXLab

8 жыл бұрын

+Jose Miguez Hi Jose, well there is a 40db power attenuator in front of the SA input. I can tell the SA the correction factor of 40db after that I'm able to adjust for 60dbm no problem. Hope that helps as explanation.. Thanks for watching 73

@josemiguez2375

8 жыл бұрын

Thanks for your kindly answer.i learn very much with your videos

Is there a substitute like MRF141, MRF174, MRF150?

Hello. And what should I do if after changing transistors I cannot come down with the current which is indicating in the service manual as the potentiometers are at their minimum?

@SWRadioConcepts

7 жыл бұрын

Did you ever figure it out?

Can part of that be used to build a custom amplifier. For example, the output stage board and the tuner board shown?

@TRXLab

3 жыл бұрын

sure why not

Hi Peter. Thanks for the video. I'm repairing my MarkV so I'm checking all the videos on the tube HI. I have drive, but no output. How did you check to see if only one FET was faulty please? 73 de OZ1IVA

@TRXLab

8 жыл бұрын

+Lars Harbo Hi Lars, with my transistor analyser thats it. Hope it helps 73

help required peter can you help ive just replace a power plug on the back of the fp29 the wires were pulled out cant find anywhere which pins are 30v i think 13.98 v are in the middle

Hi there I have a ft1000 mp mk 5 It will transmits for about 4 to 5 minutes at 200 w and then it suddenly drops to about 100 w and the SWR meter goes high reading around 3. . Have you seen this before. ?

ok so I have a crazy question. the transistors have what looks like heat sink compound, but it's not. what exactly is it? heat sink compound is softer, and with heat it may run off.

@TRXLab

7 жыл бұрын

There is nothing but heat sink compound or may I misunderstood your question? 73

@lavazza8031

7 жыл бұрын

vous avez soulever le meme probleme ???? POUR MOI

How much is the peak current? If it's less than 20 amps a VRF152 should work. These are vertically diffused MOS transistors from Microsemi. New they are about $80 apiece. The reason for the transistor for this being so expensive is that it is obsolete.

nganggo transistor bekas ha..ha...ha lumayan... 20 dolar. makasih om .

1.33A was within 100mA tolerance. especially considering the accuracy of this meter.

@TRXLab

8 жыл бұрын

+FeedbackLoop Hi, you are right. Thanks for watching All the best and Cheers

if you had to can you install transistors out of a 100w ver and just turn the gane down?

@TRXLab

8 жыл бұрын

+Matt K Hi Matt, sorry I don't know what you mean..could you please explain Thanks all the best Cheers

@Mr_Meowingtons

8 жыл бұрын

"if you had too can you install transistors out of a 100w ver and just turn the gain down?" Would you be able to install a set of lower power transistors and just run it at 100w? if you had no options to get the OEM transistors?

@TRXLab

8 жыл бұрын

+Matt K Matt, as I understood it right it is important that the transistor matches with the rest of the circuity that means the the maxium power is not the leading parameter... Hope that helps. All the best and Cheers

Loved the video but why would you set one FET to 1.1A , and the other to 1A?. As far as I know, ALL fet PA have individual bias pots too, as a side comment.

How can you refurbish a transistor?

@TRXLab

8 жыл бұрын

+MrVinamp Hi, I think they take this transistors out of faulty gear and clan wiring and print a new label on the housing that's it. Thnaks for watching 73

Hello...:-) What do You think why these transistors fail??? I found them short circuited on many FT-1000MP mkV-s for no apparent reason. I changed them and radios didn't come back ever again. And this radios work hard in a contest environment. Just on 1 FT-1000MP MkV I found bad relay on LPF unit as a reason for blowing finals...but this is clearly seen with spectrum analyser and RL bridge..just check return loss on all filter units(it has to be more then 15dB on all LPF-s)...and sligtly bumping on the relays on top of them, you will see bad ones(in and out). 73...Kiko, 9A4WY

@TRXLab

6 жыл бұрын

Well there are many possible reasons why this transistors fail and one possible reason is off course the situation you are describing here. Thanks for comment Kiko 73

Another thing to watch on eBay transistors like these is counterfeit parts. These are exactly the kind of parts that are showing up as counterfeit, especially on eBay.

@TRXLab

8 жыл бұрын

+Herbert Susmann Hi Herbert, yes you really can get fake components but up to now nothing bad heard from Lilly... Thanks for watching 73

So where can I currently buy the Mosfets. eBay appears to be counterfeit?

@TRXLab

2 жыл бұрын

Mouser.com

@ronedwards8239

2 жыл бұрын

Mouser shows this part obsolete.

personally, if buddy said take the chance, I would try it.

@TRXLab

6 жыл бұрын

Totally agree Paublus! 73

Class-A for an HF-amp? Who would want that? Sounds like an idea from the marketing department. Or is that for when the shack is too cold?

I could not take it past 30 minutes.....but good work.

@JP-pq9xi

Жыл бұрын

30 minutes is pretty good 👍

Man video is very good . Try to talk more faster. Nice tutorial also

Why is he checking it on sideband and not cw

Hi how do people contact you for repairs please thankyou

hello, who will undertake the repair of my YAESU FT-1000 Mark V field around New York

this is the second time I have seen a refurbish transistor and so far all 100% ok I would be scared lol , well you never know

@TRXLab

8 жыл бұрын

+danny blackhorse LOL yes I'm scarred too, Thanks for watching 73

Hi Peter can you give me the link you used to Lilly Electronics, what i have tried comes to a dead end...Fred in UK g4vvq;

@TRXLab

8 жыл бұрын

+Tom Smith Hi Fred, here is the Link www.ebay.de/itm/BLF147-Manu-PHILIPS-Package-RF-TRANSISTOR-VHF-power-MOS-transistor-/191046639453?hash=item2c7b445f5d:g:44QAAOxyRNJSjDLi All the best and 73's

@gvvq-pi5ml

8 жыл бұрын

+TRXBench Thanks Peter yes link works ok Fred

i had 1 final 0 output and 1 12 watts out until i replaced them jg

@TRXLab

7 жыл бұрын

very good! 73

Ugh. I do like the solid state. What I do not like is the fact that they crank so much power through ever shrinking components. These things cannot get rid of the heat the make, make them more susceptible to failure. Shrinking all the digital and low level stuff in a radio is ok. but when it comes to the power output, I would rather have a big bulky PA that is easy and cheap to repair than to have a small compact radio.

@TRXLab

6 жыл бұрын

Yes power need substantial components 100% agreed. Thanks for watching 73

Hör ich da nen deutschen Dialekt?

@TRXLab

8 жыл бұрын

+Elektronik Jawohl sehr richtig herausgehört. Danke fürs vorbeischauen. Alles Gute

73 de AF6AS

@TRXLab

8 жыл бұрын

+Chaplain Dave Sparks 73 and all the best!

Careful or counterfeit finals from China

Audio check 1.2....

@TRXLab

5 жыл бұрын

?? what do you mean

@r.kelectronics6164

5 жыл бұрын

I like your repair work TRX

my ft991 had no heath compound thats why they died...i like the new ones 700 bucks 1 watt in 1 kw out sweet however 50 v at 50 amps sweeeeeeeeeeeeeeeeeeeeeeeet j

@TRXLab

7 жыл бұрын

that always happens....good that you was able to fix it73

@jeromegrzelak8236

7 жыл бұрын

roger that some things are prone to fail thats life in the world of electronics

Deine Videos sind wirklich gut, aber es fällt schwer deinem englisch lange zuzuhören. Warum machst du es nicht auf deutsch. Dann wäre alles viel flüssiger?

@TRXLab

7 жыл бұрын

Hallo Thilo, tja das ist recht einfach.; mehr als 65% meiner Zuschauer sind von der Mutterspreche her englisch, deutsch sind nur 6,2% der Rest immerhin ca. 30% sprechen zumindest kein Deutsch, auch wenn Englisch nicht ihre Muttersprache ist.. Freut mich aber das dir die Videos gefallen, auch wenn du mit meinem Engisch nicht klar kommst.. Danke fürs vorbeischauen.. 73

tnx, 55 73 DO5NET

@TRXLab

8 жыл бұрын

+notfallmed Vielen Dank Peter!

@notfallmed

8 жыл бұрын

+TRXBench immer wieder klasse, hilft und macht Spass. ;-)

www.rfparts.com/rftransistors/transistors-blf/blf147-nxp.html $1 19:9 5 (105 Euro) How can Lilly refurbish MOS 147 transistors?

@TRXLab

5 жыл бұрын

That is a good question...,we think they only test and clean...

Funny, you buy radio that cost few thousand radio but transistors set -+300e is much? Cheap cheap'o guy

very good explanation de wb8idy

Another fine repair Peter. Wox, what a bargain. That final xstr for $20!I'll have to check out "Lilly Electrics" for myself and bookmark it for the future. Worth the money even if it is a dud.Again. Wonderful work my friend,73sTom

@TRXLab

8 жыл бұрын

+AntiqueRadioandTV Hi Tom, yeah the price difference is really huge.. hope she will keep up the good quality.. Thanks for stopping by my friend! 73's