Well done!! When you smacked that TV on the top to regain the vertical hold image, it took me back to the 70’s with our first cheap black & white TV. Subscribed! Thank you!
"Replicants are like any other machine - they're either a benefit or a hazard. If they're a benefit, it's not my problem." (c) It is very nice to see this old piece back to work. Thank you for your interest in doing such stuff.
The smaller transformer is for the vertical output. But it's not an output transformer. It is a choke in series with the vertical deflection coil, and it has a feedback winding, IIRC for the vertical oscillator. There is a lot more to do with this TV to make it reliable, I'll tell you some tricks if I don't forget about it, this weekend. Some examples: You ablsolutely need to replace the bypass electrolytic of the line output stage. It is after a choke, and the CRT heater is connected to that same point. When the capacitor goes open, the set will continue to run, but the series choke isolates the horizontal stage from the main smoothing capacitors in the horizontal frequency range, and because of that, the horizontal output boosts its own supply voltage with a lot of horizontal frequency noise. It stresses the horizontal output transformer and transistor, and also raises the CRT heater voltage by a lot, it kills the CRT within a few hours, maybe less than an hour. You also need to replace the width capacitors, they are metallized paper with very high leakage current at this point. It can easily kill the horizontal output transistor, which is VERY hard to substitute. It is a marvel of Soviet engineering that they were able to use that type of transistor as a horizontal output. The whole horizontal output circuit was fine tuned around that transistor. It is a GT810A / GT905A / (maybe GT906A works as well) PNP germanium transistor, and the set won't work properly with anything else. TVs with this chassis were manufactured until at least 1992, and they switched to a silicon horizontal output only around 1989 I think! Practically all of the transistors were silicon in these sets by ~1986, except the horizontal output. It will (IIRC) mostly work with a BD246A silicon PNP transistor, but you need to modify the driver transformer and add a capacitor (IIRC) between the emitter and base of the BD246A to slow it down, otherwise the picture will be full of vertical bars due to parasitic oscillations and the transistor will become hot. But I have to look that up, I've only done it once, and forgot the details. Or if you look up the schematic of Yunost 406, that already has a KT806A silicon NPN transistor as hor. output, but that needs quite a lot of modifications, including horizontal driver transformer modification, and I don't know if the winding data for that is available anywhere.
@@ThomasBurns You're welcome. I just realized you're in Georgia. So you can probably easily get the original horizontal output transistor, maybe even a flyback.
Hey Tomas, I had great luck finding your channel on my feed, thanks to the Alexatron robot video. Love your content; your production value is fantastic for such a small team. I wish you all the success you deserve. Congratulations, keep the videos coming!
Haha, that red colour is awesome. I just fixed up a Unimor Neptun D163 a couple days ago, thing just needed one singular transistor in the IF board replaced. Now I'm waiting on the caps I ordered for my WZT Antares 12, hope those will deal with the noise issues it's been having. Great video, she's still not perfect but at least you managed to revive it lol.
@@ThomasBurns Yes, any Soviet capacitor with the "Б" character on them contain paper, and needs to be replaced. Except ceramic-encapsulated ones with soldered-on end caps, and metal encapsulated ones with glass feed-through beads for the leads. Those are hermetically sealed, and still quite reliable. One example is the big flat brown rectangular capacitor mounted on the chassis. That is a hermetically sealed paper-in-oil, or metallized paper capacitor. Never seen one going bad in these TVs, and I've seen and worked on many dozens of this chassis. But that operates at a low voltage, so no big surprise. IIRC it is part of the vertical oscillator.
Agreed on the vultures destroying these historical, beautiful and often perfectly serviceable items for a tiny amount of precious metals. Then you've got people ripping apart radiograms for the old triodes, keyboard guys taking the keyboards from rare and important computers and leaving them unusable... It's very selfish and shortsighted behaviour IMHO. And it's nice to know I am not alone and that someone else tries to encourage the item they're working on by cleaning it up and telling it reassuring things :)
Soviet electronics are specific. I had such a red TV, the TV had a different tuner model, it worked great. Now it is somewhere in the family house. The TV also had the option power by 12V
In a pretty good condition? You sure it is? Vertical hold seems to be pretty unstable, I guess there are some solder joint's failures or bad pot connection, or something like this. Unless it's going to be part two
For cracked plastics I use JB Weld plastic bonder for structural repairs. For polishing plastics I've been experimenting with Meguiar's PlastX Cleaner and a spinning cleaning disk (you can see that in action in our flip clock restoration video). This works surprisingly well, as long as the scratches aren't too deep. To bring out the color in faded plastics, especially black plastics, I'd like to try some 303 Protective Cleaner, but haven't had a chance to test it yet. My personal preference is to avoid repainting parts during restoration, as that never seems to come out right.
@WorkshopNation I'm new to your channel, came here by way of the Alexatron video. I'm not sure if you mention it in one of your videos, but how did you come to be working on old Soviet tech? Your Alexatron vid shows you visiting Tbilisi, are you living in/around one of the old Soviet satellite states? You don't have to give me specifics, I'm just curious.
I’ve spent about half of my adult life living in former Soviet countries, particularly in the South Caucasus (Georgia, Armenia, Azerbaijan). There’s something about that part of the world that draws me in. :)
Kids these days will never know the struggles of using tin foil on tv antenna to try and get HBO and other porn channels thdt come on late at night trhough analog tv signlas with the bunny ears and tons of tin foil and fonding the right spot tognet rhe channels you want if you dont like whats on tv on regular cable. I was born in 92 and they will also nevwr know the slap to fix electronics
Absolutely love the content. I just wish we could get weekly uploads!!
Me too! Working on it. :)
@@ThomasBurns =D
Absolutely!
Kids these days don't appreciate how valid a solution slapping electronics is
If it works for the Falcon’s hyperdrive, it works for us.
still works fine, slapped the shit my aio CPU cooler. and the pump just started working again. and have been for over a year
Percussive maintenance is the technical term...😂😂😂
Percussive maintenance
Well done!! When you smacked that TV on the top to regain the vertical hold image, it took me back to the 70’s with our first cheap black & white TV. Subscribed! Thank you!
I love how he goes through all this effort and still has to whack it to work properly
Thank you!
"Replicants are like any other machine - they're either a benefit or a hazard. If they're a benefit, it's not my problem." (c)
It is very nice to see this old piece back to work. Thank you for your interest in doing such stuff.
Thank you, Andrei!
The smaller transformer is for the vertical output. But it's not an output transformer. It is a choke in series with the vertical deflection coil, and it has a feedback winding, IIRC for the vertical oscillator. There is a lot more to do with this TV to make it reliable, I'll tell you some tricks if I don't forget about it, this weekend. Some examples:
You ablsolutely need to replace the bypass electrolytic of the line output stage. It is after a choke, and the CRT heater is connected to that same point. When the capacitor goes open, the set will continue to run, but the series choke isolates the horizontal stage from the main smoothing capacitors in the horizontal frequency range, and because of that, the horizontal output boosts its own supply voltage with a lot of horizontal frequency noise. It stresses the horizontal output transformer and transistor, and also raises the CRT heater voltage by a lot, it kills the CRT within a few hours, maybe less than an hour.
You also need to replace the width capacitors, they are metallized paper with very high leakage current at this point. It can easily kill the horizontal output transistor, which is VERY hard to substitute. It is a marvel of Soviet engineering that they were able to use that type of transistor as a horizontal output. The whole horizontal output circuit was fine tuned around that transistor. It is a GT810A / GT905A / (maybe GT906A works as well) PNP germanium transistor, and the set won't work properly with anything else. TVs with this chassis were manufactured until at least 1992, and they switched to a silicon horizontal output only around 1989 I think! Practically all of the transistors were silicon in these sets by ~1986, except the horizontal output. It will (IIRC) mostly work with a BD246A silicon PNP transistor, but you need to modify the driver transformer and add a capacitor (IIRC) between the emitter and base of the BD246A to slow it down, otherwise the picture will be full of vertical bars due to parasitic oscillations and the transistor will become hot. But I have to look that up, I've only done it once, and forgot the details. Or if you look up the schematic of Yunost 406, that already has a KT806A silicon NPN transistor as hor. output, but that needs quite a lot of modifications, including horizontal driver transformer modification, and I don't know if the winding data for that is available anywhere.
Wow! This is such great info-thank you so much!
@@ThomasBurns You're welcome. I just realized you're in Georgia. So you can probably easily get the original horizontal output transistor, maybe even a flyback.
Inspiring and impressive the knowledge! Both of you!
Hey Tomas, I had great luck finding your channel on my feed, thanks to the Alexatron robot video. Love your content; your production value is fantastic for such a small team. I wish you all the success you deserve. Congratulations, keep the videos coming!
Thank you, Federico!
Really love restorations, a pleasant video to watch too! Enjoyed watching, looking forward to next video!
Thank you so much!
i don know but i like old crt tv and i like that you are also happy to work on crt tvs/monitors
@@Hahahahahahahahhahhahahahaha Thanks for watching, Only!
Enjoyed watching the troubleshooting process you went through with this!
Thanks so much for watching!
still some bad contacts inside .... but the old-fashioned "tap on the box" does the job !!! hahahaha.
Nice vid !!!
@@joostderidder thanks for watching, Jacques!
Haha, that red colour is awesome.
I just fixed up a Unimor Neptun D163 a couple days ago, thing just needed one singular transistor in the IF board replaced.
Now I'm waiting on the caps I ordered for my WZT Antares 12, hope those will deal with the noise issues it's been having.
Great video, she's still not perfect but at least you managed to revive it lol.
loved the channel!
Your advice on testing cheap parts before use is good. I've been doing the same as I've been burnt too many times. Chinesuim is a cruel addiction.
Why did I find this awesome chanel im the liddle of the night....
I know im hoing to watch em all!
Good Stuff, much love from sweden ✌️
Thank you!
@@ThomasBurns Noticed now my spelling was bad😅
but I was right, I did watch all of em all!
Blade Runner is my favorite! Very well done, Thomas!
Thank you, Andrei! What other video could possible be better for testing analog tech?
Holy cow, why are you so cool!?! I can’t believe I’m just finding this channel now. Plz more vids
Working on more videos! Thanks for watching, Robert!
I love seeing those old Soviet germanium transistors !
Excellent work! I liked the background music too.
Thank you!
Awesome video! Thank you!
Loved it! Good luck and keep posting!
Thank you, Temur!
6:11 the same connector is still the one we use for digital tv! atleast here in Finland
For digital?! Interesting. :)
@@ThomasBurns Here in Estonia too. 😁
The "БМТ" ones is paper-oil caps, not sealed. You should replace all of them too, like old electrolytics. Eventually, they all will blow up.
Thank you!
@@ThomasBurns Yes, any Soviet capacitor with the "Б" character on them contain paper, and needs to be replaced. Except ceramic-encapsulated ones with soldered-on end caps, and metal encapsulated ones with glass feed-through beads for the leads. Those are hermetically sealed, and still quite reliable. One example is the big flat brown rectangular capacitor mounted on the chassis. That is a hermetically sealed paper-in-oil, or metallized paper capacitor. Never seen one going bad in these TVs, and I've seen and worked on many dozens of this chassis. But that operates at a low voltage, so no big surprise. IIRC it is part of the vertical oscillator.
Love it! Great job!
Thank you!
Agreed on the vultures destroying these historical, beautiful and often perfectly serviceable items for a tiny amount of precious metals. Then you've got people ripping apart radiograms for the old triodes, keyboard guys taking the keyboards from rare and important computers and leaving them unusable... It's very selfish and shortsighted behaviour IMHO. And it's nice to know I am not alone and that someone else tries to encourage the item they're working on by cleaning it up and telling it reassuring things :)
Wow! I restored similar model for museum recently. Was in really bad condition. Made a video as well
Soviet electronics are specific. I had such a red TV, the TV had a different tuner model, it worked great. Now it is somewhere in the family house. The TV also had the option power by 12V
О, мы тоже в детстве стукали по телевизору, чтобы он работал ) Все так делали в СССР ) У нас был "Рассвет 307"
❤❤❤❤
Love you art sir.
nice!
Thanks 😊 cool content
Thank you!
In a pretty good condition? You sure it is? Vertical hold seems to be pretty unstable, I guess there are some solder joint's failures or bad pot connection, or something like this. Unless it's going to be part two
Hahaha yes you're right that it's still got a long way to go. But we try to celebrate the small victories. :)
Is there a technical name for twatting it on the top like that to "fix" the picture, I first observed this technique back in the 70's
One of the other commenters referred to it brilliantly as “percussive maintenance”!
Percussive maintenace, got it.
Для такого пластика можно использовать дихлорэтан.
Please make a video how to add component input to ЭЛЕКТРОНИКА TV set!
Great one! What are you using for the plastic case cleanup and restoration?
For cracked plastics I use JB Weld plastic bonder for structural repairs. For polishing plastics I've been experimenting with Meguiar's PlastX Cleaner and a spinning cleaning disk (you can see that in action in our flip clock restoration video). This works surprisingly well, as long as the scratches aren't too deep. To bring out the color in faded plastics, especially black plastics, I'd like to try some 303 Protective Cleaner, but haven't had a chance to test it yet. My personal preference is to avoid repainting parts during restoration, as that never seems to come out right.
i love it
Can u fix the millenium falcon?
@WorkshopNation I'm new to your channel, came here by way of the Alexatron video. I'm not sure if you mention it in one of your videos, but how did you come to be working on old Soviet tech? Your Alexatron vid shows you visiting Tbilisi, are you living in/around one of the old Soviet satellite states? You don't have to give me specifics, I'm just curious.
I’ve spent about half of my adult life living in former Soviet countries, particularly in the South Caucasus (Georgia, Armenia, Azerbaijan). There’s something about that part of the world that draws me in. :)
@@ThomasBurns Very cool! Sounds like your life has been quite the adventure! Thanks so much for responding ^__^
How does someone who sounds to be North American come to be fixing soviet technology in Georgia?
Carpe diem, my friend!
I love the soviet method of fixing it at the very end... Just hit it
телевизор юность 405 у меня до сих пор работает я на нем в денди играл🙂
💝💝💝💝💝
❤
Вы где нашу СССР советскую электронику достали ?)))
В Тбилиской рынке!
Конденсатор super loose... а у следующего вообще кишки вылезли...🤣🤣
Хорошо было бы все конденсаторы заменить, но их не мало в этом телевизоре. :)
Kids these days will never know the struggles of using tin foil on tv antenna to try and get HBO and other porn channels thdt come on late at night trhough analog tv signlas with the bunny ears and tons of tin foil and fonding the right spot tognet rhe channels you want if you dont like whats on tv on regular cable. I was born in 92 and they will also nevwr know the slap to fix electronics
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