Amplifier Burned 🔥? YL Raisa looks inside R-140 

That is a very impressive amp, an interview with the builder would be a worthwhile video. Something to think about. I hope you get repaired and back in operation soon. Hello from Arizona, USA.

Hi Raïsa ! Be very carefuul with this kind of amplifier ! High voltage is very dangerous and can kill even it's unpluged. Condensators are always in load. Happy New Year 2023 ..

Troubleshooting radios is a skill that has been lost by most hams. Glad you were able to find the problem, and hope it gets fixed soon.

Best of luck Raisa with the repair. Looks complicated. Glad you can get the builder back to fix the problem. 73's de Syd EI3IEB

Awesome video once again. I love listening to the russian. When you called your friend, what did you say right before здравствуйте?

Good gracious 😮 Good luck and be careful Raisa !

Its interesting to see inside these amps. I also watch Mr BBi ,he repairs and builds amps. Hopefully your friend will repair it soon. Happy new year Raisa! 73

Hello. I worked as a soldier at the R-140 X ZIL 131 radio station for two years, 1986-1988. . This radio was a durable construction. In winter weather -15 degrees below zero, blue flames flew from the HV source and it lasted. The final stage was very durable. I have nostalgia for R-140 :-). Power amplifiers are bought in the Czech Republic. Regards Mike.

Ба, да это УМ передатчика Р-140. Во время службы в СА служил на такой радиостанции.

Hallo Rasia I enjoy watching your videos. You are a very intelligent and interesting young lady. What frequency do you transmit?

So nice to have a friend who can fix this. Lucky you!😊

When things where really made strong and of very high quality. Worth to repair. Nice. Thanks for sharing.

Hello again Raisa, It's great to see you again. I hope the damage was easy to repair so that we can hear your dulcet & beautiful voice on the air again Very Soon. Stay Safe, Kindest Regards, Ray, M0RAY. X

Great job working on an amplifier that has to be at least twice as old as you are :) Someday you'll be able to pass it to another new ham - assuming you can find a big truck to move it!

You are so lucky to have such a wonderful amplifier. 73 and thanks for the video.

Thanks for sharing Raisa… Interesting to see the inside of the amplifier… I don’t have one but never would have thought they were that heavy!

Good luck with the amplifier, Raisa! But please be careful of high voltage!! The capacitors can remain with very dangerous voltage for a long time after switch-off of power....

WOW! Over 30K views in a week! What a great goal with your channel and videos! Congratulations my dear friend! You are the best!

Nice job troubleshooting ham radio friend. Ham radio is so much more than just operating and you have been showing that. I always liked doing what I can to troubleshoot my radios and if possible fix them. Looking forward to you getting it back up and running. I wonder what caused the problem. I am sure your friend will check it out to see why and then fix it. Keep having fun!! 73’s and 88’s!

Really exciting seeing you taking us along. Greetings, Jeff

I hope that you are able to fix your amplifier soon. I enjoy your videos and hope to catch you on the air one day. Stay safe and good luck. Best wishes for you from the USA. 73!

Awesome great job. 👌 Happy New Year..73..

Hello Raisa. When a resistor burns, it is because another associated component such as a capacitor, an inductance or the valve itself has a short circuit. The fault seems more to be in the cathode-grid circuit, otherwise if it had been in high voltage the RF choke of the board would have burned. It doesn't seem like a big fault and it's a terrific amp. Be careful with the high voltages inside are several kilovolts. I hope you fix it soon and get back on the air. 73 of ea1axt from Spain.

I'm very happy to see your videos Raisa, thank you very much 73

Hi Raisa, Glad you found the burnt component. Hope the tube is OK and it doesn't take long to repair for you to get back on the air. You need that amp to bust the pileups. 🙂 Stay safe. 73 WJ3U

The problem with the amplifiers (both tubes and solid state) is the service when someting goes wrong. I my eperience I was able to fix two or three times some issues in my old gu74b

Be careful of the capacitors as well. They age and can fry or burn as well. I would suggest you make a list of the capacitors that are used along with many photographs of the amp so as to mark the components location and values. Do you have a schematic of the amp? How old is it? My understanding is that Russian operators would design and build their own equipment. That is what I grew up understanding. Too many of the hams in the U.S. are appliance operators, my being one of them and not ashamed to say so. With this in mind, I am going to guess that the amp will probably say 'Made in Russia' or similar. Let me know if I am wrong. Where to get parts is what I am wondering. In this current situation, I doubt you have a Radio Shack store to go to. How do you get parts? That could be a subject for another video. How do you all obtain parts these days? Trade among yourselves? Make your own? Find old radios (as some of us do here) and beg, borrow and steel parts? I don't think I am the only one wondering these things. I hope you get it fixed and soon.

Hi Raisa, tnx for lovely QSOs while at OL88YL (you were literally my neighbour!) as OK5Z QTH is less than 25km away from mine :) Crowded part. 73/88 Jiri OK2IT (OK4I). PS: I hope you have it working. I also use one converted R140 Amplifier on my REMOTE station as it has got 10 electromechanical memories. BTW: The builder is correct. That seems to be screen voltage regulator board and it seemed that tube has drawn way too much G2 / SCREEN current. If resistor burned I think tube will be OK! bye

Заинька! Твой английский - музыка !!! Спасибо! Всех благ!

Luckily, the protection kicked in and the damage seems small. Hopefully the tube is OK, they aren't cheap! I wonder why it happened on receive, that is very strange. I haven't succumbed to buying an amplifier, as I need to hear better before I send better lol. Good to see you digging in. So many don't or won't. Good luck!

What a lovely lady! That is the dream of every man, well mine. Keep up the good work and passion for radio's

Раиса здравствуйте! У меня тоже горели резисторы по напряжению 350 вольт в стабилизаторе, потом поставил релейную защиту по 2 сетке и все пропало, минимальный скачек по 2-ой сетке и схема уходит в защиту, сбрасываешь нажатием кнопки и все проблемы. Ещё стоит в цепи 350 вольт предохранитель 0,25А на всякий случай, вдруг схема не сработает. По напряжению 3.000 вольт стоит родная релейная защита, минимальный скачек по току и схема уходит в защиту, сбрасывается кнопкой, как и по 2 сетке. Лампы дорогие сегодня, приходиться делать дешёвые схемы защиты. Кнопку сброса нажать не трудно. И лампа цела. класс!!!

how much POWER you get out from this PA?

Hi Raisa, I admire you very much when you are on the frequency I rush to connect you, my name is Gennaro, I really like it when you pronounce my name Gennarioooo, I would be very happy to have a QSL from you, even direct at my expense, I have some sent to you many but none have arrived yet, I thank you and I am sending you 73/88 from Turin Italy.

Hello YL Raisa, I hope your amplifier is working again. I'm also running the same tube here, but in a differently constructed amplifier. Please, please, please: Don't change a thing until you exactly know what you do. Even a wrong resistor (i.e. with more inductivity) can get you or your amp in trouble...and half an ampere at these voltages isn't fun anymore. Btw: Do you have had trouble with these screen grid capacitors (this star-like ensemble in the socket of the tube) yet?

Watching you remove the lid knowing there are Very High Voltages inside was very concerning. I'm glad you have a experienced friend coming to help.

Now that's a shame you got problems with your Amplifier. I hope you can get it fixed soon. I'm sure you will be heard ok on 100W for now until it's fixed. I would love an Amplifier like that in my shack but we are restricted to a maximum of 400w here in Australia.

Hello Raisa, it was nice to see you, from Roy Wright K E 4 W Y J Hendersonville Tennessee & 73,s

Hey, a morse paddle on your desk! Taking a dive into CW? Great! Hope you get your amp fixed soon.

Is the tube a GU43b or GU34b ? As other said already, be careful of high voltages.The high voltage is applied to the gray metal part of the tube and can stay there for hours (may be days) after the switching off of the power supply. Also be care about medium voltages also. That tetrodes tube should have up to 400 volts to other parts of the tube (grid). Likely you burned the resistor due to too high grid current due to over driving the amp or perhaps unmatched antenna or a combination of both. 73 !

Glad you've got your amplifier fixed. Maybe I'll catch you on 20 meters someday. 73

Да... Подвел вас Раиса стабилизатор напряжения управляющей сетки. Резистор это следствие... скорее всего, что-то кроме него там придохло. По какой-то причине резко возрос потребляемый ток в цепи управляющей сетки. Удачи в починке и 73!

Have you checked the antenna for short circuits? Hope it works again soon. The tube is a thing of beauty!

It's great to have an Elmer (ham radio mentor) to help you out with this. My icom 756 pro 3 (my main radio) has an issue with low power output, but only on SSB and it's got me stumped, so far. I hope we get our equipment back up and running soon, my friend. Then we can meet up on the air one day and exchange 5/9 reports lol I hope you are doing well and 2023 gives you lots of reasons to smile!

Congratulations on 10k subscribers and good luck on the repair. We will need a tour of this amp once it is repaired 73

Great Viedeo !! I like this selfmade things !! But don’t worry , I make DX with 6 w 😅 you can also do it as long as it is damaged 😃

Be extra careful with those tube amps where open! Even after a while disconnected, some caps and specially the tube plate (heatsink) can held voltages of 4000 V in excess if there' s no proper (or malfunctioning) bleeding circuits. Bad luck abt the resistor but surely with your friend help it will be back on the air very soon!

screen voltage protection resistor. it means too much current were drawn on screen voltage, sometimes plate to screen short circuit(tube is gone) other times zener resistor fail, so over voltage , voltage to screen on tube, draws more current then and amplifier power goes more gain = higher current on screen then designed for. (, then +_560 ohm resistor burns out, install 1/8 amp fuse to protect circuit if not installed already. zs2cx

Ooh, yesterday I fired up my final stage transistor of my Xiegu X6100.This is a QRP Transceiver with 10 W max. I hope we both can fix the problem asap. Have a nice day and good luck.

Looks like heavy duty built amplfier. Hope you can get it fixed up, last amp I am working on here is 4-400 single tube amplfier I did have many other amps before too but had move and couldnt take them with me at the time. I know some them real heavy. well you should be able fix it amplfier since you know the builder. be safe working on them too high voltage 73s Tony ve4akf

Good luck with the magic smoke / smell! If this was me, I wouldn't know what to do! LOL

Huge and heavy amplifier! I hope those electronics components were still available...

Got this video in my recommended. Never thought a ham radio community existed on RU-vid, very happy to be proven wrong. Hope it gets fixed soon!

What tube is it.

That is a real cool amplifier. Glad the damage is not too bad. 73 👍🏻

Que precio tendría uno de esos actualmente? Es un Gran Aparato,Espero lo Arregles y lo conserves muchos años,Gran obra de mano factura Rusa,Saludos Desde ZACATECAS Cápital MEXICO

Facinating to watch.good job.

Hi Raisa and happy 2023. I'm sorry about R-140 fault but I think there is no a big issue, with Eugeny's help you can fix it soon, I'm sure. Have a nice time and thanks for your video. Regards from Rome, Italy, 73s de IW0HEX Pasquale.

HELP😭I Have a directional and multi-directional on a splitter input to 1 tv WHAT AMPLIFIER Auto adjustments i need. I lose stations. Am try to get stations form 2 directions🥺

Raisa What tube ?

Hi Raisa , nice to see all your videos. 👍👍

Just opened my 572 and did a ton of reflowing of cold solders and replaced tubes…….. amongst many other things. I have it on the Variac right now VERY slowly raising the voltage.

Thanks for sharing..... 😀

Sorry to see your amplifier has a fault, its a real pain when this happens. I have experienced the same thing a few times. I hope you get it repaired soon. It is definitely the safest thing to do to wait for your friend, like others have said they can be lethal and not worth the risk. I'm sure you will still sound awesome on 100 watts for now and hope we hear you on the bands plenty in 2023. Happy new year.

love from cali i dig your yt page

How many watts is that amp?

Amazing machine !!

And I was wondering, why the buzzer stopped transmitting. 😁

Be carful for the high voltage!

Many thanks on your video per FBI/CIA/FCC vs FSB/SVR approved video

how did you move this giant around? it's place is on a little but robust table with wheels

Glad I found your channel I subscribed. The relay may have stuck on because of a blown transistor.

Wonderful tubes. Wish I could get my hands on ones like those. Burning smell or not.

Это усилитель не из тех, что раньше на глушилках стояли?

At least your amplifier broke with a failure. I have one that I can’t use because I am allergic to cats, the amplifier works just fine, but I can’t be in the same room with it unless it is in a bag, and it clearly not work with no air flow. Also have watched 3 of your videos so far, wondering what antenna you have, will go watch more to see if you shared your antenna

If only there were a few more like you. Been looking for 14 years now VE9MLG

Yea....."Wow"!

Hi , Raisa! Thanks for your video's. You are the girl of my dreams ;-} It,s verry special , a girl/woman seeing interesting for ham radio. But, it make.s it extra special to see your tech skills. I am inpressed!! {almost in love hihi!} Keep posting your video,s it makes my day. Greetings from Alkmaar {the Netherlands}🌻

that is a masive unit looks heavy duty. what is power out put ve1-bhm

Hi Raisa looks a easy fix but that amplifier looks very heavy I hope all goes well that amp was built to last.

Следим за судьбой усилителя. Может быть он и не нужен?

Nice Unit!!!

Раиса, Вы прекрасны! 73 R2DWZ

Woa, awesome Amplifier!

Dangerous gear there, Raisa. @ 3'07" the burned item is a choke comprising a high value resistor with a fine winding on it which looks as though it has shorted to the copper pad below. I can't see if there is any damage to the component to the left which is sleeved.

Good amplifier

Good driver

Good luck .

Good luck with the repair , it’s only a temporary set back x

Can you get an ADCOM Linear like the DX COMMANDER.

that's a proper beast of an amplifier and I very much doubt the tube is blown. more likely a capacitor which has done caused a few knock on effect. but nevermind it's a good excuse to go for a nice long walk somewhere are for some qrp action

brilliant video

nice amp. That is worth fixing up for sure.

Раиса, сенькю вери матч фор ю зе радио пропагаден!❤

Now thats an amp !

👍👍

Cool ampelfire😍

Какая лапочка )) Она и в усилителях понимает, что такое "резистор" )), Радиолампа ))). Я смотрел на ютубе , американка - инженер, сама делала антенны )). Некоторые симпотичные американские девицы занимаются ремонтом старых ламповых гитарных усилителей ! Девушки и электроника ? ))) Класс.

Раиса, это феерично. Такая стройная и хрупкая на фоне этого чемодана - удивительное зрелище! Спасибо, порадовали фильмом. Желаю Вам таки заменить этот ПЖ на что-то более лёгкое и современное.

Hi Raisa. It's sad to see your amplifier has died. Hopefully it will be able to be repaired. 73, 88's and **Hugs**