TEC 41- 18 Kilo Bulgarian monster from the times of socialism.
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#benchpowersupply #Capacitor #powersupply #akakasyan #2n3055 #labpowersupply #ps #power #bulgaria #retro #technology - วิทยาศาสตร์และเทคโนโลยี
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This device was designed by my parents. It was developed in the Institute of Electrical Devices in Sofia , Bulgaria. For this innovative design my parents were reworded the equivalent of about $7000. In the early 80s communist Bulgaria that was a huge amount of money. The production facility was based in the town of Mihailovgrad, about 100k north of Sofia. The main customer were the Soviet Military, which explains why the manuals are in Russian and the bulletproof housing. I inherited two of the first test prototypes . :)
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.
ThIngs from back then were built to last. It's so nice to see a device in such pristine condition. The ripple is astoundingly low, even more so considering the age of the device. Take good care of it - it's a piece of engineering history.
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?
I used to design housings for equipment like this. I'm quite shocked at how thick the aluminium sides of this housing are. Some of them even look like they were foundry cast and then milled. Normally half a millimetre thick sheet steel would have sufficed.
The printed circuit boards are a gas. Some of them look like they were done manually. A guy in my office had the job of designing such PCBs by hand using black sticky tape on translucent sheets of plastic. This was then used to photographically transfer the circuit plan onto boards. Yep, those were the olden days before computers.
Nice video, a joy to watch.
5:55 Such devices used for weight training probably explains why there are so many successful Bulgarian weight-lifters.
That is a beast, indeed. No cost-cutting evident in there. Looks like an older HP unit construction wise. Truly a keeper.
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.
6:28 2N3055, the good old power transistors made in Romania (the beta stands for IPRS Baneasa factory) when there were produced electronic components. I made few power amplifiers (up to 150W) and two power supplies with them.
8:51 the LED 7 segments (VQE 24/22) were also made in Romania at Microelectronica.
Also my guess is that the ceramic capacitors and resistors were made in USSR and canned ICs are Tesla made.
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.
Back in those days, lab devices were built to last a long time. This power supply is proof of that. I'm sure it will still work fine in another 30 years.
1:22 I still have this Soviet power supply (ИПС-1) in working condition, all original parts in place. I bought it in 1987 or 1988.
I found similar power supply in a dumpster, Czechoslovak Mesit MN40V10A, after carrying it 500 metres my hands hurt for another 2 days :D It has broken potenciometr for current, but otherwise works perfectly ;-)
Прибору более 40 лет. Вот делали когда-то на века, высокое качество, не то что сейчас.
Wow, looking at those Bulgarian-made resistors and capacitors makes me nostalgic :) Back at the time, units like this were considered old-school, chunky and inefficient, it is funny to see this unit praised 34 years later. By the way, the KEA capacitors have some surprising characteristics. They're either very bad or they last forever, so changing them is not mandatory.
I love the construction. Heavy is good, heavy is reliable. If it does not work you can always hit him with it
BRILLIANT! "Boris the blade"
That is a very nice power supply. I'm glad to see that it is in good hands, and someone will be able to use it.
Still use them in my laboratory
I'm from Bulgaria. My dad has 3 of those and I remember playing with them when I was a kid. Now I'm an electronics engineer and I've been designing products for the last 7 years. Now i can really appreciate the monster parameters of the TEC. And i can still feel it in my lower back ... i moved it around when i was little. I dont recommend it.
Your unit is in great condition. No scratches or dust. Dust buildup for those is very common because of the open slots. You got a good deal, even for that price.
Hi! I am working in modern electronics manufacturing company in city of Botevgrad in Bulgaria, and we still use TEC14 in our maintenance workshop :) Now i swear this machine is immortal... We have put it in hell working environment and conditions and he still refuse to die 😂 Incredibly reliable beast!
😁super! pred 41 rokmi (1981) som navstivil mesto mramoru - Michajlovgrad, rodisko tohto laboratorneho monstra... Na reproboxy postavene tam z mramoru sa neda zabudnut, prosto domaci kamen, ako vraveli miestni😁
Maybe was meant for export to the russians since the manual is in Russian. Source I'm from Bulgaria.
Махай окраинското знаме и слагай българско,
@@AlexanderSashkin Ще ми казва какво да правя! Като съм половин украинец ще слагам знамето! Теб какво те бърка?
I can't remember the last time I saw wiring laced as opposed to tie wrapped. Nice looking piece of kit.
Happy new year gentlemen
My self "Shailendra Rajput" and i am from India 🇮🇳
You provide a great knowledge of electrical engineering
And I am also a metallurgical engineer
Impressive power supply! It's MASSIVE, more than my Unitra Unima CC/CV PSUs. A thing of beauty and a joy for ever.
They way you describe it, I would run to the shops and get one!
Great machine! I hope you change the main capacitors and that soon you will be able to take advantage of it, which I believe is one of the best PSUs manufactured in Europe. Congratulations on the purchase and a wish you have a nice 2023.
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.
I bought my bench power supply 1 year ago and in that year I haven’t had a SINGLE use for it. Nothing has broken, nothing needs fixing, nothing needs building.
you made a great Xmas gift for the old man ;-)
And still working. Not made in china👍
It would be interesting to see the performance comparison with all new modern capacitors.
If any at all
I’m afraid that my obsession with IEC sockets renders me excluded from thoroughly enjoying any appliances that have their mains leads permanently attached to them. DAMN?! They’ve actually installed the busbars that you’d expect to find within circuit breaker boxes that are installed outdoors. Those PCBs remind me of some older Fluke boards that I’ve seen. THANK YOU FOR SHARING ABOUT THIS TROPHY PIECE FROM THE GOLDEN AGE OF MAN’S INGENUITY AND INVENTION. Very good demonstration!
с Новым Годом from the UK!
As a Bulgarian I have to say that I haven't seen wat socialism was like, but we surely don't do these things anymore..
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)
Superb quality you could not pay today!
Those connectors are platinum plated.
Cool piece of hardware
Excellent vintage equipment.
Thx bro
Really Lovely.
What about the industrial induction heater you are planning to repair
very cool!
Good job
Thumbs up for being kind. Ty
Absolutely beautiful!
very robust device! You can see components from all over the Eastern Bloc.
Que equipamento maravilhoso.
The manual is in russian not bulgarian.
Old is gold
Excelente 👌 👌 👌 👌 👌 👌 👌
Amazing video 🔥
Happy new year everyone🎇🎇🎇🎇🎇🎇🎇 and kasyan tv
Please make a video on
How to modify PC Powersupply to a Fixed single voltage Power supply. I mean single output like 60V 10A
Yess sir
also in my d.i.y charger.
I entered the mode: external volt test.
to check the batteries before recharging.
simply by cutting off the power supply.
in that feeder.
a single 2n3055 would be able to deliver 5 amps.....but why risk it
В чём фишка заклеивать марки приборов?
Ich habe sowas noch nicht gesehen das kommt aus eine Millitärfertigung so gut verbaut
Such devices was loved by electrochemyst, in near past. Just because for very fine working. Today no man's of science, no such devices. Only buy and brought generation.
pretty nice stuff
this is made in Bulgaria is not a china junks 😃
Did the previous owner like clean the insides? daily? with a toothbrush?
Most likely kept them under dust covers.
awsum content bruh
Only a puppy really! Try my Farnell H30-100, 0-30 volt and 0-100 amps, semi linear, has a thyristor pre reg to minimise dissipation, weight? 90 KG!!! Even with 2 guys it is a very heavy lift from floor to bench! I have 3 of these! Also in my collection are 2 of it's smaller brothers, the H60-25, rating now obvious from the model number, weight 45 KG!! I had to change the MCB on my power distribution panel to a higher trip current, to handle the switch on surge from these beasts! My largest electronic load can only worry the H30-100 upto 7.5 volts at 100 amps, and have yet to find a 3KW resistor of a low enough value and large enough current rating to fully load it, so really I should make one!
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.
зачетная штука )
Watched this because it was suggested, but even after I have no idea what this is actually for. Could someone explain?
My best guess is it's a testing/diagnostic kit for power input/output, and possibly for use as a power supply? But for what? I only know a little bit about electronics, just enough to find and re-solder bad contacts, so this is beyond me haha.
The first one to like and view 💥
Its me 😁
Cool 😎 das kleine stehende Netzgerät hat Conrad od anderer elektronischer Versand
in den 90ern vertrieben...
👍🏻👍🏻👍🏻👍🏻👍🏻
That looks like a Rotek.
А ещё в Болгарии делали самые лучшие приводы постоянного тока. Даже сейчас нормальные продукты сделать в этой сфере достаточно сложно.
кемрон и кемток если не ошибаюсь.про самые лучшие- не соглашусь
@@larry999y проработка была неплохой, некоторые компоненты были не самые надёжные.
2N3055 transistor is not well soviet made . is it ?
одлично појачало.квалитет уграђених пасивних компоненти је бољи од западних делова.
што се тиче транзистора не може се нико такмичити са јапанцима....
Not sure about the title of this video referring to this item being "from the times of socialism". Don't you mean from the times of communism?
Communism and socialism have some passing similarities, but they're not the same, in practice, in theory or in effect.
How can I self study electronic
It's not TEC but TES in latin letters (NTR 30.5 in cyrilic leters as GRUBO, FINO).
Yes. Also Fino means fine and Grubo means coarse.
I saw this and instantly went... wow, i wonder how many 3055's are in there?
Hay, I have old Kenwood PD18 30AD
As far as i have read and heard, Former eastern bloc countries (outside of USSR ones) were working more or the less economically and scientifically independent from the Ussr, if they had any 😐. Bulgaria, Poland, Czeck Slovakia, Yugoslavia, Hungary, Romania and East Germany were economically working well to an extend but the calamities started in late 1970's. USSR used to intervene in politics(usually) not in other parts.The USSR had its own problems and other countries had their own. The poor eastern Europe that we used to see in 1990's was the result of collapse (of course, they were poorer than western Europe before the collapse, but things get worse by magnitudes after.)
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.
ohmy I have C1-73
Nice
Can you make a video on solar tracker
I'm following you from 2019 and learn a lot from this channel
So i hope you do this for me 🙏
This monster, if produced now with the same quality, would cost at least 2000 euros.
At that time, we produced a lot of equipment in Bulgaria for the entire Eastern bloc under joint projects and orders, either for mutual aid or for the needs of the market... and there was a lot of work. There was no unemployment, there were plants and factories that worked around the clock and still could not meet the demand. There was also social policy, and now it is wild capitalism that recognizes nothing but money.
Then the former social camp produced absolutely everything, and the production was at a level, despite the ugly design. The things manufactured were supposed to work for decades, and if they broke down over time, they could easily be repaired.
Then came capitalism .......... and all factories and factories were sold or looted by communist cronies and their proxies ……
At that time, there was almost nothing that was not produced in Bulgaria, but it was produced only with the consent of the communist authorities in Bulgaria and the former USSR
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.
🤪
in quel epoca i russi i transitor li avevano appena conosciuti non avevano alcuna competenza a riguardo basta vedere il modo costruttivo e pa disposizione dei componenti per vedere immediatamente gravi errori proggettuali , insomma i soliti russi 😥
The communist made some amazing stuff. But its bizarro.
The documentation is on Russian.
Чего с голосом. ? Голос не тот. Ктото другой озвучивает
Chinese be like : could do it for 10 dollars shipping included.
what a beauty.
Bro upload new videos 😢😢😢😢
"one of the most stable and fantastic power supplies"
>nobody ever hearing tes-41 in their entire lives
Also 34401a? Hello?
haha load
"socialist dictatorship"?
Nothing special to that power supply. From design point of view it's not correct engineered, overengineering ....nothing to praise.
Similar to all soviet products, big, inefficient and with mediocre "performance". You should check the USA power supplies from that time, for example Sorensen (DCS series is from that period, and I would say we cannot compare them, not to mention they used switch mode with same performnce as this linear one...)
Everything what wasnt made in America last for a long time…
Amazing that there are folks interested in a power device ....how dull
What does "two times less" mean? Does this mean "one half"? If so, please use the latter. If you think carefully about it, "two times" less has no meaning in English. I presume it's a direct translation from your native language, which I suppose to be one of the Slavic family. "Two times more" is quite clear - three times the starting amount. "Two times less" ... perhaps it might mean "one quarter (one fourth for our US cousins)", because the price is reduced twice. Or perhaps it's the result of some complicated asymptotic function. I'm at a loss.
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.
From the times of socialism, huh??
Please learn the differences between Socialism and Communism. And you should have done your homework better on the device. The manual is clearly in Russian. Not Bulgarian. As well as other minor details. Your presentation is very clean and spot-on otherwise, but just for these two unforgivable mistakes i will have to give you a thumbs down.
Take care.
Oh an ad. I am sorry but I am forced to give a thumbs down. Do better.
EURO CRAP!