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 Post subject: Russian Tubes
PostPosted: Aug Mon 05, 2019 3:22 am 
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Joined: Jan Mon 17, 2011 2:10 am
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Location: Revere,Massachusetts U.S.A.
Hi Folks, I'm seeing Russian tubes for sale on EBay any thoughts regarding buying any, I saw a few replacements for 12SQ7 ??
Thanks Tony


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 Post subject: Re: Russian Tubes
PostPosted: Aug Mon 05, 2019 1:00 pm 
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Joined: Nov Wed 30, 2016 7:35 pm
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Location: Sunbury, Ohio 43074
I don't know specifically about the 12SK7, but personally I'd take a Russian tube over several "new tube" manufacturers. They've been at a long time over there, and one would hope their processes are more or less refined by now.

As with any tube, there are variations between tubes, and you'll occasionally find of course a dud due to manufacturing defect.

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 Post subject: Re: Russian Tubes
PostPosted: Aug Mon 05, 2019 1:41 pm 
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Joined: Jul Fri 10, 2009 10:13 pm
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Location: Weymouth,Massachusetts
Why not just buy NOS 12SQ7 s they should be plentiful enough aren't they?
Henry


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 Post subject: Re: Russian Tubes
PostPosted: Aug Mon 05, 2019 10:25 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 14710
Location: Fernandina Beach, FL
I have not purchased any "modern" Russian tubes except for a few Sovtek 5AR4 tubes, and the jury is still out on them (NOT a negative comment!) . However, I have several CCCP/USSR era tubes that are excellent, mostly from the late 70s-80s.

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 Post subject: Re: Russian Tubes
PostPosted: Aug Tue 06, 2019 2:06 am 
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Joined: Jan Mon 17, 2011 2:10 am
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Location: Revere,Massachusetts U.S.A.
Thank You To All for the feedback
Tony


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 Post subject: Re: Russian Tubes
PostPosted: Aug Tue 06, 2019 5:41 am 
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Location: Vancouver Island, Canada
Sovtek is a reliable brand, IMO.

Beware of rebranded tubes, where a similar tube but with different specs is renamed to fill the demand for common types.

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 Post subject: Re: Russian Tubes
PostPosted: Aug Tue 06, 2019 9:09 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 1328
Location: Orlando, FL, USA
While Sovtek is a "brand" is it NOT a brand in Russia. Sovtek is simply the lowest end house brand of New Sensor, the company that merchandises most of the Russian tubes in the USA. Other brands they sell are Electro-Harmonix and modern Russian makes of Mullard, and TungSol.

One time I had to buy 100 pieces of Russian-made 6L6s from New Sensor. I called them up as asked, "I see Sovtek 6L6GBs and Electr-Harmonix 6L6EHs. Are any of these a 6L6GC?" (6L6GCs have higher voltage and dissipation ratings than 6L6GBs).

The reply I got was "Oh, the Sovteks are the rejects". The reply was probably specific to the 6L6 type, but it told me something of New Sensor's business practices.


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 Post subject: Re: Russian Tubes
PostPosted: Aug Wed 07, 2019 3:47 am 
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Location: Central PA 16801
I will take a USA made tube any day over any new production tube.

but...

I have a stash of 80s soviet 6n14p or 6n14n or whatever that are rugged 6BQ5 tubes. they are excellent tubes.

I used a quad of JJ (Yugoslavia) 6BQ5 tubes in this Motorola HiFi. for new production tubes, they are excellent too.

viewtopic.php?f=1&t=341427

steve

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 Post subject: Re: Russian Tubes
PostPosted: Aug Wed 07, 2019 3:24 pm 
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Location: Fernandina Beach, FL
Dutch Rabbit wrote:
I will take a USA made tube any day over any new production tube.

but...

I have a stash of 80s soviet 6n14p or 6n14n or whatever that are rugged 6BQ5 tubes. they are excellent tubes....
steve

Me too, Steve. They are excellent tubes.

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 Post subject: Re: Russian Tubes
PostPosted: Aug Thu 08, 2019 3:59 am 
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Location: Central PA 16801
oh yes indeed

many years ago, i bought a PILE of those rugged soviet military tubes from an ebay seller in the eastern part of the state. he offered me more tubes upon the already won auction for a price that i could not pass up.

i am/was very happy with the JJ 6BQ5 in this:

nice pics on page 4

viewtopic.php?f=13&t=341427

i was told by a lot of guitar amp people that JJ tubes seem to hold up the best when driven hard in both bias and plate voltage.

so, with that said, if i ever need to go new production tube, which i most likely never will, JJ would be my first choice for being "close" to the old USA versions.

the reason i used these JJ 6BQ5 tubes is b/c a good friend gave them to me whilst i was working on the motorola. they were an already matched quad and i did not have to go into my tube vaults, drag out equipment, and play "match game tube style".

gene rayburn isn't around anymore.

steve


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 Post subject: Re: Russian Tubes
PostPosted: Aug Thu 08, 2019 2:19 pm 
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Location: Beaver Falls, PA. USA
Years ago, I had a service call on a Hammond RT-3 organ at a church; they needed it that afternoon for a wedding! The problem turned out to be a Russian 6AU6 which had gone dead. I replaced it with a NOS GE tube, and the wedding went on as planned.

I have a decent stock of common tubes, and two of my fellow club members deal in them. At this point, I try to stay away from the Russian and Chinese tubes.

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 Post subject: Re: Russian Tubes
PostPosted: Aug Thu 08, 2019 8:07 pm 
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Joined: May Sun 13, 2012 8:12 pm
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Location: Central PA 16801
thankfully at this point, i will never have to rely on russian tubes to fill my needs.

steve

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 Post subject: Re: Russian Tubes
PostPosted: Aug Thu 08, 2019 8:53 pm 
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Location: Fernandina Beach, FL
Dutch Rabbit wrote:
thankfully at this point, i will never have to rely on russian tubes to fill my needs.

steve

Me too. Yes, I have some Soviet tubes. But I have more than enough USA and European made NOS tubes. I just like them...

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Don


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