TEC 41- 18 Kilo Bulgarian monster from the times of socialism. 

We also like radiomagazines from Bulgaria.

great to have legacy of the makers commenting. can you expand more about the all use cases of these or similar units?

@@cubertmiso I was a kid back then. I don't remember much. I followed a different career in my life. When I grew up, I saw many of these power supplies in all labs and workshops around Bulgaria. They are still in use to this day. I do remember that trade talks with large Soviet customers in the 80’s were tough. Under great pressure the Bulgarian side agreed to sell for 40 rubles per unit. It was below the production costs, but the Russians insisted that they were supplying energy resources below the market prices. That was the great paradox of the communist so called Economy. The more you manufacture, the more you lose. It all crushed in learly 90’s. The plant ‘Analitic’ in Mihailovgrad went bankrupt. If there had been a better management, the plant would have survived and even thrive within the EU.

​@@lachezarpetkanchin6944 Thanks for the share. About the EU situation: In the EU area most manufacturers, even the clean ones were incentivized to move production to Asia. All because of the ESG/Blackrock/Regulation. In Asia they can revert back and use dirty ways of making these products. And EU-politicians can now tap each others backs and claim that things are now better/cleaner. Now they regulate all AI/Tech jobs away from EU area and act like the others would care about their piles of paper and regulations.

@@lachezarpetkanchin6944 "The more you manufacture, the more you lose." This have a name, and it's called "dead labor", and this is a capitalism paradox, as Marx explained all this in his book Capital in 1867, before any "communist" experience existed in the world.

Under Socialism things where built to last. Under Capitalism things are built until the warranty expires... Then you buy another new one. Capitalism only works if people consume... that's why they have to use "inbuilt obsolescence"... or you will never buy new... Right?

Cost cutting unheard of in Socialist economics, if there is something equivalent it be tied to low resources and thus necessitate alternative or cutting that specific materials out completely, also method of mass production such was seen during Soviet patriotic war when T-34 gearbox and engines were reduced in production time and complication, however reliability was still astonishing, all T-34 alive after war, were made during war usually never received new transmission or engine despite being made "poorly" but such savings made transmission and engine production times 30% faster! However in Socialist computers, no expenses were spared many times to their own detriment.

They all are made in Bulgaria in Radio Factory in Mihailovgrad, Veliko Turnovo and Blagoevgrad, the capacitors are based on Japan licence by bulgarian national standard, transistors are based on German licence and again made in Bulgaria by national standard.

@@technixbul Right, consult databooks first. The beta symbol was the logo marked on semiconductors by IPRS Baneasa and the LED indicators were also made in Romania. The red color of capacitors made me think that were made in URSS also the shape or resistors, altough Czechoslovakia also made similar shaped resistors. Keep in mind that in CAER sharing was a thing and many socialist countries bought components to use in their own factories, CAER being preffered over western countries. It was no shame to use an IC made by Tesla in a product made in Bulgaria and sold in Romania. I found many soviet, RDG and romanian logic ICs, CPUs and memory in computers made in Romania at that time.

@@sebastian19745 Too bad IPRS no longer exists. I bought all the kits they made but also burned most of them. As a kid, I didn't know that transistors must be hooked up a certain way. After I asked around, I was able to successfully build the kits and I displayed some as trophies in my room. I felt like a king. Those were days..... and now I envy the kids who play around with Arduino....

@@sebastian19745 - yep, that's correct - these 2N3055 are Made in Romania by Baneasa. In earlier models of this power supply other brands were also used. The same layout of the Power Supply - with the same LARGE heatsinks was used for at least 10 different models made between early 1970s and 1990. All capacitors I saw in the supply are Bulgarian made - the big electrolytics and the small red ones - they all are made in Kiustendil factory. The resistors are also Bulgarian made. They are the "RPM" model, made in Aitos factory near Burgas. "RPM" model is a licensed copy of the Soviet "MLT" model. The difference is only in the paint colour - Bulgarian ones were mostly grey, maybe with a bit of green tint, while the Soviet ones were in red, dark red or in brown colour.

@@liviuconstantin9960 I made too few kits, but all that I have now are the memories of how happy and proud I was when something worked, or the frustration of a imperfect kit that even after troubleshooting refused to work. Do you still have some documentation, schematics, photos, PCB images? I would like to remake some and maybe improve them.

BRILLIANT! "Boris the blade"

Changing the capacitors without testing them would be a mistake. Many modern capacitors are simply not durable enough.

Bom...apesar de eu não o ter mencionado é evidente que não faz sentido trocar electrolíticos sem os testar nos dois parâmetros habituais. É provável que os estejam suficientemente bons para continuarem de serviço, sim. Além disso, esta PSU é demasiado preciosa para receber condensadores banais. No caso de ser mesmo necessário, a questão é onde encontrar à venda condensadores electrolíticos novos, de boa qualidade e resistentes à passagem do tempo. Se é que tal coisa existe, actualmente.

Махай окраинското знаме и слагай българско,

@@AlexanderSashkin Ще ми казва какво да правя! Като съм половин украинец ще слагам знамето! Теб какво те бърка?

Most likely kept them under dust covers.

You don't want to see it. I saw it from the inside and the results of it, and we are only barely getting out of it (though some of its poison will be difficult to shake off for at least one more generation)

Yess sir

30V@100A is a small to medium sized arc welder :D

There are loads of good made power supplies on the world market from the past. The american EMI, Systron Donner/Trygon and HP, the british Farnell, Sun, Coutant , the german Gossen, Heinzinger, Elektroautomatik, Rohde & Schwarz , the french Schneider and Schlumberger and not to forget the Philips ones made in ???. They all made impressive lab power supplies . I own several units from HP, Systron-Donner , EMI, Gossen, Philips and Elekroautomatik. The strongest I own is made by EMI. It delivers solid 0- 40V / 0-200A from a three phase outlet. It weights 70kg !!!. The most used on my bench are the Gossen Konstanter 0-32V / 0-10Amp, 45 years old and work like from the first day. Another one in daliy use is dual power supply HP, with 2x0-50V and 0-1A. My oldest in working condition is an Lamda unit working with tubes/valves. 0-350V / 0-1,5A. with 20!!! 5881 in the final regulator stage. It looks cool in its black wrinkle paint and 40th style knobs & meters. But a very heavy iron monster. An old Philips is a source for tube/valve circuits. 6,3 /12,6V 12A for heaters / 0- 500V plate/screens and 0-150v for the control grids. And the weirdest is an ac power unit. it put out stable 0-150V ac / 0-5A / 40-500Hz adjustable, made in USA by Elgars. I have no idea about former eastern pwr supplies , but I know that the tchechians made good , reliable electronic stuff way back in those days.

Yes. Also Fino means fine and Grubo means coarse.

кемрон и кемток если не ошибаюсь.про самые лучшие- не соглашусь

@@larry999y проработка была неплохой, некоторые компоненты были не самые надёжные.

Comparing to most of the "west" my home country was on a level or beter of. West has just one thing supreme, propaganda. Its used as weapon for wery long time, now even against its own citisens. Yugoslavia was destroyed becose it was bad example for western "democracies" that there can be diferent solutions, not just communism and "benevelant" capitalism. Look how that turned out 30 years later...

The eastern bloc had industrial and technological facilities that third world was jealious of it,but they couldn't keep the pace.

@@droopy_eyes i didn't know that ussr grabbed their productions to that extend,but i could guess they were independent to an extend, because east europian devices from that era are much better than soviet ones(if communist commrades do not get angry at me😁)

@@alisharifian535 the Soviets grabbed more than you can imagine. In Bulgaria for example, even during the initial occupation, before even the military resistance was crushed and the killings and forced deportations finished, absolutely everything that could be physically removed from the country was removed. We are talking about entire production lines, stocks, even boats with their cargo - everything was stolen into the Soviet Union. In addition to that, they took all the food and utilities they could to the point of putting people in such a fertile land as Bulgaria in food distress. Heck, they even stole the wood door frames from the spa and vacation centres they lived in. Only once the country was stripped bare and dozens of thousands of people killed, only then they started "buying" whatever they deemed ok to allow each country to produce. They never let anyone be autonomous, not even the richest and "freer" countries.

@@huskytail I know that they confiscated things on their own,And the same happened when they occupied Iranian Azerbaijan for a short time after WWII. They said they want the means of production to create a better society but in reality they looted countries.I didn't know the extend of the pillage. what i mean is that east european goods(cold war era ones) where generally better in quality compared to soviet ones.

And all of that at the cost of only two hidden bankruptcies of the state and an almost default in 96 due to the financial politics from the previous decades. Stunning, ain't it. 🤪

I'm following you from 2019 and learn a lot from this channel So i hope you do this for me 🙏

Its me 😁

i understood him perfectly and im english. the K must stand for Karen

@@noimnotarobotcanubeleiveit7024 Yes. You probably do. That speaks reams about your ability to analyse language.