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Old 5th September 2012, 03:10 PM   #1
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Default Are These Authentic Russian Military 1578 Vacuum Tubes?

I wanted to double check with the experts, these seem to be a good price if they are indeed 1578s.

Pair 6SN7 6N8S 1578 tubes metal base, hole plates. MELZ Lot 2 pcs. #6 | eBay
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Old 5th September 2012, 04:03 PM   #2
DimZ is offline DimZ  Greece
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6N8S (6SN7) tubes with metal base, hole plates. MELZ
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Old 5th September 2012, 04:30 PM   #3
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$75 - per pair.

Nonsense for 6N8S. They are worth about $3 each. Metal bases were used probably because they were too much in stock.
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Old 5th September 2012, 04:38 PM   #4
TheGimp is offline TheGimp  United States
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I generally get suspicious of any tube with halo rings in the getter. The getter should be solid all the way to the edge.

My experience with tubes having such rings has been that they are often times gassy.

I think I'd be more inclined to go for these if I wanted 6SN7s.

http://www.ebay.com/itm/RARE-FACTORY...item27cab25b19

Last edited by TheGimp; 5th September 2012 at 04:45 PM.
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Old 5th September 2012, 04:49 PM   #5
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Quote:
Originally Posted by LinuksGuru View Post
$75 - per pair.

Nonsense for 6N8S. They are worth about $3 each. Metal bases were used probably because they were too much in stock.
I have a few 6N8S I paid about that much for... these have a different internal structure and hole plates as well as the metal base.

As far as I can tell, they look like the same tube as the 1578... I have read the earlier tubes made in Melz were never stamped 1578, it was the later Reflektor production that was stamped 1578. But this is just what I read on the internet, who knows if it is true.
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Old 6th September 2012, 04:09 PM   #6
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Nobody knows if these are identical to the 1578?
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Old 6th September 2012, 04:32 PM   #7
kevinkr is offline kevinkr  United States
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Wavebourn might be able to give you a better answer, they do look like 1578 to me, but I do not know the answer as to whether Melz marked these or not with the 1578 nomenclature or if indeed these are later Reflektor made ones. Melz produced tubes were apparently quite high quality and are well regarded in Russia.

The price seems pretty good for a pair of 1578, I guess the question would be is whether or not they are marked as 6N8S or 1578 or both, and are in fact real 1578.

My personal experience with Russian, Ukrainian, and former iron curtain eBay sellers has been entirely excellent, but as always caveat emptor - don't spend more than you are willing to risk if things are not as they appear.

The seller is here on diyAudio - DimZ posted a link to a thread about these tubes, I'd PM the seller for more detail.
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Old 6th September 2012, 04:36 PM   #8
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Quote:
Originally Posted by Davec113 View Post
Nobody knows if these are identical to the 1578?
Not the year. Price is too high i think 6N7S / 6N7GT audiophile double triode tube. NOS. Lot of 8. | eBay
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Old 6th September 2012, 04:47 PM   #9
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Quote:
Originally Posted by Professor View Post
What do you mean by "not the year"?

The link you gave are obviously not 1578, are you recommending these tubes or showing how cheap they can be? I have a few older 6H8C I paid a few bucks for, they clearly aren't the same tube as the ones I am asking about.
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Old 6th September 2012, 05:09 PM   #10
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Originally Posted by Davec113 View Post
What do you mean by "not the year"?

The link you gave are obviously not 1578, are you recommending these tubes or showing how cheap they can be? I have a few older 6H8C I paid a few bucks for, they clearly aren't the same tube as the ones I am asking about.
Sorry, i mean 1578 is 6Н8С in metal. I thought you solved that 1578 is year of production ) They were used in automatic equipment of the first nuclear reactors.
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Last edited by Professor; 6th September 2012 at 05:12 PM.
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