Author Topic: What is this?  (Read 1966 times)

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Offline ELS122Topic starter

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What is this?
« on: October 15, 2019, 11:44:26 pm »
What is this thing?
 

Offline bob91343

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Re: What is this?
« Reply #1 on: October 16, 2019, 01:06:09 am »
My wild guess is that it's something out of an electronic musical instrument.  Have you tried energizing it?
 

Offline ArthurDent

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Re: What is this?
« Reply #2 on: October 16, 2019, 01:29:28 am »
This might be a linear power supply with multiple outputs. The large heatsink has a metal bracket with a large round hole that could have been for mounting a fan for the output with the highest current, fused for 6A. There are three black heatsinks, two of which that are probably for a +/- supply, each rail fused for 1A. The last heatsink is for a forth output that is fused for 0.5A.  There were probably 3 LEDs near the switch with the black "~" cap and one has broken off. The 3 LEDs were probably indicators for 3 of the outputs. This supply was probably removed from some piece of equipment that died and was used as a makeshift bench supply.
« Last Edit: October 16, 2019, 01:41:13 am by ArthurDent »
 

Offline tkamiya

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Re: What is this?
« Reply #3 on: October 16, 2019, 04:29:54 am »
Looks like there are two very old fashioned IC on the board.  What does it say?  Looking that up should tell you what it is.

I think it's a linear power supply like ArthurDent says.
 

Offline DannyTheGhost

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Re: What is this?
« Reply #4 on: October 16, 2019, 05:01:44 am »
This board uses transformer that is specifically used for different vacuum tubes (multiple outputs of 6.3V).
My best guess would be power supply board for anything from Soviet test equipment with CRT screen (starting from oscillocsope).
 

Offline james_s

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Re: What is this?
« Reply #5 on: October 16, 2019, 06:06:58 am »
It looks Soviet to me, it's obviously a power supply of some sort, although I have no clue what from.
 

Online amyk

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Re: What is this?
« Reply #6 on: October 16, 2019, 12:04:38 pm »
Those ceramic-gold packages suggest this wasn't a cheap item. I can't read the part numbers, that would help greatly with identification.
 

Offline ELS122Topic starter

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Re: What is this?
« Reply #7 on: October 16, 2019, 01:12:04 pm »
I don’t own it! I found it listed for 15€
 

Offline Gyro

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Re: What is this?
« Reply #8 on: October 16, 2019, 02:01:03 pm »
Yes, I'd say multi-rail PSU too.

That is the most rigid looking wiring loom I've ever seen - it seems to incorporate mains an low voltage wiring. Maybe it was wired point to point and then the excess bundled up into the fat part of the loom.

Nice looking transformer and cute heatsinks. I wonder if those ICs are to uA723 type clones.
Best Regards, Chris
 

Offline soldar

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Re: What is this?
« Reply #9 on: October 16, 2019, 04:25:31 pm »
Looks like there are two very old fashioned IC on the board. 

The combination of ICs with string-tied harnesses is ... interesting.
All my posts are made with 100% recycled electrons and bare traces of grey matter.
 

Offline ELS122Topic starter

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Re: What is this?
« Reply #10 on: October 16, 2019, 04:39:55 pm »
The description says : Power block. Block 1
If that is any help

And again I don’t own it so is it worth buying it as it is really cheap and I could use a regulated 12v/rail to rail/tube power supply. I will ask the seller if it’s working.
 

Offline ELS122Topic starter

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Re: What is this?
« Reply #11 on: October 16, 2019, 05:29:47 pm »
The seller said that it can be tested, all the fuses are original, the original power cord is still good and hasn’t been lost. So if it works what is it?
 

Offline soldar

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Re: What is this?
« Reply #12 on: October 16, 2019, 06:09:08 pm »
I am pretty sure it is a power block.
All my posts are made with 100% recycled electrons and bare traces of grey matter.
 

Offline james_s

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Re: What is this?
« Reply #13 on: October 16, 2019, 06:35:16 pm »
Looks like there are two very old fashioned IC on the board. 

The combination of ICs with string-tied harnesses is ... interesting.

Soviet electronics had a lot of idiosyncrasies like that. It's a weird mix of cutting edge and the past. They made Nixie tubes right up to the collapse as far as I know.
 

Offline Bud

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Re: What is this?
« Reply #14 on: October 16, 2019, 07:05:43 pm »
Whatever it is, you will need to replace the electrolythics. See if that is worth the trouble.
Facebook-free life and Rigol-free shack.
 

Offline DannyTheGhost

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Re: What is this?
« Reply #15 on: October 17, 2019, 02:24:34 pm »
Okay, let's say I saw this board already somewhere... right, in my "old stuff" box in my office ;D
It is linear power supply.
It outputs +5V, -5V and 12V.
Dont know about its current capabilities, but transformer is rated for ~60W.
black ICs - discrete logic chips that gives button switch "EN" function and some basic control like short-circuit protection.
Those hybrid goldy ICs - according to its part number - linear regulator with regulated output rated for 150mA
If you want any more description about this board - you will have to wait till Monday, when I will be able to get to it
 

Online wraper

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Re: What is this?
« Reply #16 on: October 17, 2019, 02:28:44 pm »
The combination of ICs with string-tied harnesses is ... interesting.
Was standard thing in USSR. Zip ties were rare.
 

Online wraper

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Re: What is this?
« Reply #17 on: October 17, 2019, 02:33:56 pm »
Ceramic ICs look like 142ЕН1, 142ЕН2  VREGs. https://eandc.ru/pdf/mikroskhema/142en1_142en2.pdf

 

Offline ELS122Topic starter

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Re: What is this?
« Reply #18 on: October 17, 2019, 05:19:00 pm »
Ceramic ICs look like 142ЕН1, 142ЕН2  VREGs. https://eandc.ru/pdf/mikroskhema/142en1_142en2.pdf



so there not as great as they look
 


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