Expertise needed

[paul-man]

Hello everybody
I stumbled on an item really new for me. The vendor's description was: "2 vacuum relays from russian military radio equipment. ". As he seems to be from the former GDR, I assume that these relays are from the time when russian forces had bases in the former GDR. So far so good. The issue is - I don´t know anything about these relays. Is there anybody out there that can give me a bit of information - especially on the content of PMs?
BRGDS paul-man

 

[nickvc]

Unless you get a reply from former USSR countries I think it will be guesses so I’d take it apart and test , with this stuff it can be extremely rich in values or just junk.

 

[Yggdrasil]

Hello everybody
I stumbled on an item really new for me. The vendor's description was: "2 vacuum relays from russian military radio equipment. ". As he seems to be from the former GDR, I assume that these relays are from the time when russian forces had bases in the former GDR. So far so good. The issue is - I don´t know anything about these relays. Is there anybody out there that can give me a bit of information - especially on the content of PMs?
BRGDS paul-man

Are there some kind of numbers or text some where?

 

[anarxi]

This is a vacuum relay from radio station P 836.
there is only silver.
(most likely)
this is what they sell.
https://m.qrz.ru/classifieds/detail/rele-s-r-836_454132

 

[paul-man]

Thank you guys.
No PMs except silver! That‘s disappointing.

Brgds, paul-man

 

[4metals]

Thank you guys.
No PMs except silver! That‘s disappointing.

Brgds, paul-man

Not as disappointing as it was in the early 1970's when Silver was $2.50 an ounce. Back then Silver was more of a nuisance than precious.

 

[anarxi]

Some people's soup is thin, while others' pearls are small...

 

[Alondro]

Some people's soup is thin, while others' pearls are small...

I make good thick soup! Especially with potato soup, ya gotta add the right amount of milk and cook it a bit longer to thicken it a bit. And make sure it's whole milk. Low-fat milks won't thicken! (Suddenly a cooking class...) ;D

 

[orvi]

Thank you guys.
No PMs except silver! That‘s disappointing.

Brgds, paul-man

If there is vacuum, there is no oxidation. Where is no oxidation, there is no need for metals that won´t ever oxidize

Lots of old equipment even from 60´s is completely barren of PMs, that is happening from time to time to all of us across the former Eastern bloc. But then you stumble upon old USSR oscilloscope on the local flea market and pull out 200 g of old MLCCs from it Once happened to me, bought for 30 euros, pulled out 1-2 g of gold and 15g of PdPt from it.

Another time, I was too hasty and lured myself into purchasing old vacuum tube one for like 50ish euros... And as anyone experienced know (this happened in my beginnings many years ago), there is little to none PMs in vacuum tubes I was overhyped on the phrase "old is good", so I get a lesson I barely made back half of the money by painstakingly selling vacuum tubes and scrapping all transformers inside

 

[galenrog]

Back in the stone ages, when most of you were polywogs, one of our instructors in military electronics was a tube designer in one of his previous lives. The primary choice in metals and alloys in vacuum tubes was efficiency doing the required job under very high heat for tens of thousands of working cycles. Just which alloys? I have forgotten most of that. It was, after all, well over four decades, one stroke, and several TIAs ago