Don't stop making "bloody long" videos. We all like them. Just keep going .... 🙀

23:43 Soldering on top of existing leads during repairs was actually encouraged by Tesla to prevent the thin PCB traces from tearing or detaching from the board.

That is actually a very fine power supply design. You have found a gem there ! Though it could use a couple of cans brake cleaner to remove accumulated dust and dirt. Switches should be cleaned with contact cleaner afterwards. Find some red plastic to insert in the lenses instead of painted bulbs - replace bulbs with the ones you have with lower current to avoid plastic lenses burning out. 0.5W 560 Ohm in series to match the 24V/20mA lamps for the 48V supply.

I have got the same supply, it works for nearly 50 years. It seems in original state inside. It has some issues, but works. One fine tune wire potentiometer TP680 has gone and some bulbs too. The wide combination of outputs is unique, it is able to load power amps, opamps and logic from the one box. The design is simple as a hammer, even my dog can repair it ;)

Most enjoyable to watch. I love the old through whole component construction devices, reminds me of my teenage years when I was bodging together amplifiers from second hand salvaged components, tag boards and point to point wiring. As solid state devices took over I lost interest in building. Roll on part two.

USSR times - everything in the East Europe was Polish, Czechoslovakian or Yugoslavian parts. But over all it was quite nice piece of engineering taking into consideration limited resources and access to "western" technology and parts. Great video!

Cool power supply. Probably close to 50 years of dust in there. Great to see you repair it and to be able to learn from you.

You have so many old components, it's amazing 😍

I love this old analog stuff 👍

Holy cow! this thing is built like it's going to the moon.

Now that's a beast, it must have been in service a bloody long time. Built for reliability, not for high current. Hmm more pass transistors, bigger transformer and diodes/caps, no naughty thoughts lol.

Love seeing older gear brought back to life!

I love the construction and the old components

I love how these old czechoslovakian devices have symetrical component placement and great serviceability. I have osciloscope Tesla bm 464 and i was able to fix it without any tools.

Great video. I love the “Zap” button on the front of the supply. Next time I design something I’m putting one in.

Hi Daniel, it would be great if you could do some videos on ring testing capacitors! It seems to be a really interesting way to understand its attributes. Thank you for the video!

25:07 It's funny to call it "ring testing" because that is a term I've only heard for a way to check grinding wheels for cracks. An intact and safe grinding wheel will ring when suspended and struck, while one which has a crack in it will be dampened and will not ring. Very similar principle!

I am a big fan of russian MLT resistors. They are very rugged and quite precise. Those bayonet type lamps are made for telephone excanges. That is why they are 48v. They were used extensively on the operator panels of the telephone exchanges to notify the said operator that there was an incoming call on a certain line.

More videos like this and longer please. Has always, good video.

How to judge old electronics, lift it up and if dam heavy there is a excellent transformer in it. Nice video. The different screw lengths can be an old way to see if the equipment was opened. Who remembers which screw went where.

Ahahahah, they don't make them like this anymore, that's for sure...!!! Very nice video...!!!

17:11 LOL Your humor is genius.

Really nice! I would never have expected that many components for a linear supply (more than many switching ones) and surprising it still worked as well as it did with that many capacitors that was complete trash, haha - but always nice with vintage stuff that works well.

Fantastic construction!

Thanks!

Nice power supply! Looking forward to the next part of the restoration!

Those resistor markings are objectively better than color stripes.

Nice power supply! 👍 Great video, as always!

I love your videos were you replace caps and some other stuf so it works correct again, and your video's were you test smartphone chargers.

I just recently had some of these tesla electrolytic capacitors in a rft eo 213 oscilloscope and they all had cracks as well but surprisingly the ones in my other eo 213 are still fine.

Man that is some nice design there Removable module is amazing

I recommend to add antiparallel diode to each output. I accidentally shorted wires while having all outputs connected (I needed over 100 volts). Both KD502 were instantly damaged. Current limiter probably switched output off and it got negative voltage from other sections. In that state was on each adjustable output over 65 V (even on big 50 V capacitors).

yes please, Dont stop the video just keep going. Its better to watch one of your video than a 2 hour bloody lond movie. Sound doesn't matter too, as far as we understand we are good. Appreciate the effort.

Thank you for the video Daniel! Keep up the great content!

The construction reminds me of military technology, so high quality and smart looking.

Nice how the power switch label reads ZAP.

amazing power supply.

Bedankt

Bloody hell! That's one big power supply!

Thanks

Waiting for next 👍🏻

Quite a cool power supply - nice for experimenting with solid state amplifiers :) KD503 are legendary, I like them a lot. That's a lot of FULL BRIDGE RECTIFIERS for sure! And an obscene quantity of electrolytics to replace. :)

Great inspection and analysis! What an effort for just a rather weak DC-powersupply and how many components! I have a Server-PSU capable of 6 kW power with 42V and nearly 150 Amps with very low ripple and half the weight of this one! But a traditional linear PSU is something else than modern switch-mode PSU 🙂

Great video, as always!

Very interesting device.

super video

damn...can you imagine being the guy who had to wire that beast? all of the thread wire wrapping is nuts

Great video. Please make more vid like this... I really love this kind of vid and diy project with explanation

@21:37 - Don't fret, my friend. You did a wonderful job here. I like the jumping content style.

Looks heavy duty enough to be worth rebuilding and upgrading.

Nice video. Thank you. It was interresting.

This is so cool, very interesting ❤

Such a great brilliant alien technology old vintage is built I am seriously surprise to see a huge circuits and all are detachable from the main unit 😳😳😍

Nice power supply! Great video and get well soon 🥭🍵☺

I am learning from you that a gadget can be fixed without the slightest attempt to clean it first!

Danke! Thanks! Want to see the next part :-) And as always Waiting for: More details+information Further analysis Complete(even bodged) repair And of course more bloody long videos Still learning from you

Congratulations for you video

nice

I really love old czech technology, but its really sad how it ended. For example old Czech Tesla.

Nice 😁

I like the cat’s perspicacious comment. 😀

awesome video! have cold a fire extinguisher!

The SCR used as pre regulator is another ‘forgotten’ / exotic feature nowadays - not seen in several linear PS. It would be interesting to see it working (voltage measures at filter capacitor, under 1A load, for instance) to relieve power dissipation in the series-pass transistors, and how much noise it would generate in the outputs.

amazing, i'm just building linear PSU with 723 and old TESLA power transistors KU60X 👍 , that PSU was probably very good when it was new, i wish there was a schematic tho

23:17 Mr Carlson’s Lab has left the chat… 🤣🤣

@2:07 - It's funny to hear the switch you're operating interfere with the camera sound. Cool.

Top

Class 👍🇮🇪💚🙏🏻

16:20 polskie żarówki :-)

Its kind of amazing how a board like xl4016 can limit the current up to 10 amp is smaller than this..

"nicely dirty" DiodeGoneWild 2023

Tyristor v 5V kanálu slouží jako tyristorová ochrana proti přepětí. Tento kanál slouží hlavně pro napájení TTL, a tato ochrana v případě proražení tranzistoru, otevření smyčky vyšlusuje napájení celé sekce. Něco podobného můžou dělat ty velké tyristory na chladičích, s tím že reagují na proražení prvku a nebo překročení proudového omezení. To může být taky důvod, proč ti tam ty 4A pojistky vyšlehly. PS: Ta oprava žárovky, slušná prasárna! Mohl jsi odpájet od té miniaturní ty kontakty a připájet ji do těch starých když už.

At 22:50 let’s replace the capacitor and he pulls some Tesla capacitors! Awesome Daniel!

26:20 I messed about with capacitance and electrolytes for a while. If something is decomposing to release an acid, like an ester or a large alcohol, it will increase the capacitance as an electrolyte lol. I had a dried up 4700uF cap that was at 1200uF but it did 5600uF when I added 1% sulfuric acid in distilled water. It was garbage naturally because it ate like 5% of the energy lol. The more polar "mass" you add to the dielectric, the higher the capacitance but the trick is it needs to be an insulator. Afaik traditional electrolytes are alcoholic esters of borax which are large, polar molecules but don't conduct.

I would enjoy to be my lecturer in university just to listen to your wiiierd acceeennt

Nicccccce

Niiiiiceeee!

Líbí se mi tyhle videa, ale strašně mě irituje, že si to ještě nevyfoukal, Danyku prosím tě vyfoukej to, už z toho mám vyrážku po těle :D :D @DiodeGoneWild

In the square box next to the fuses may be another bunch of paper caps that could go up in smoke.

Very nice to watch. Do you intend to draw the schematic? It would be great to see at least part of it, how this was done 50+ years ago, using these less usual (for us) parts and features. Thanks for sharing such great videos!

POOP RESIN :D Jinak mrkni na manuál k TSZ75, ten je dostupnej a i schemata, je to naprosto ten samej zdroj. Já mám doma TSZ, musím říct že to přepínání napětí je pecka, pozdější AUL zdroje s poťákama a ledkovýma měřákama jsou opruz na obsluhu, furt přepínáš měřák na napětí a něčím točíš, tady nacvakáš co potřebuješ a jedeš. 😉 Schema k TSZ jsem už dlouho neviděl, ale pokud se nepletu, ty tyristory jsou crowbar přepěťovky, ne řízený usměrňovač. Usměrnovače máš 3 složený z KY diod na chladiči, pro A,B a 5V zdroj, pro 15V zdroje jsou to ty diody na plošňáku.

Part 2 please...

A switched-linear power supply.

Very interesting 40 years in the electronic industry EVERYTHING was liner supplies when I started, but don't think I have ever seen one without a voltmeter . I would be nervous of a failure in regulation and at low voltage setting it would actually be putting out full voltage . (Scaredy cat) Thyristor on the fixed "might" be crowbar protection , if voltage goes above fixed , it shorts output and blows the fuse ?

Mám jeden, který je funkční jen částečně. Schéma nějaký mám a le čas... ten čas není 😀

If they are thyristors on the board, they would have to be GTOs (gate turn off thyristors); they are more likely to be transitors in a weird case.

I believe the fuses are German coded. F=flink, SF=super(or sehr) flink, T=träge, ST=super träge. That's what we've learned in school. Greetings from neighbour country Austria.

+1 for ringing out the caps! :) Did you already do a video on ringing out parts?

Testing obviously bad capacitors is totally pointless..... But why is it that I love watching it being done??? I mean, someone could post a 4hr long video titled testing bad capacitors and I'm not doing anything else for the next 4hrs without question! But methods for capacitor testing on this channel are second to none! It's just not taught in school....

i have similar devices on my high school xD

That remote connector is a very expensive, military qualified, Hypertac connector.

so, this power supply worked without half the components until you blew the fuses :)

U have 'Iskra" capacitors in stack

interesting but, why did those 4A fuses blew with just 2A of current? Or what are the actually "fusing"?

I wanna know, from where you find the components or from where you get them. Like capacitors, transistors....

Good that you didn't need to replace those 5000μ electrolytics... a new pair would NOT be cheap.

この源、ポロンガの花は！！！😎👍

at 23:56 the brown 270R resistor on the left seems to be cracked maybe it is damaged as well

Glad you care about the quality products built right near your home. Btw how is your cat? I think Louis Rossmann would pay you a million dollars for it?

nice supply. looks of soviet origin, or made with parts of easturn manufacture at least