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Author Topic: 6V6's in OTS  (Read 5474 times)
hywelg
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« on: September 09, 2009, 09:05:02 AM »
Had a couple of NOS russian military 6v6's

http://www.langrex.co.uk/images/valves/6p6s6v6gt.jpg

in my OTS for a week now. No problem biasing them to 20mV. They sound very good indeed, a warmer earlier breakup and nice harmonics, esp if you run with the master volume at 8-10. Very pleased, will be ordering a few spares. I know they're not rated to 450V but I did ask the supplier and he said they were very robust valves and would be fine. Seems so, so far, but it is early days yet.
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Pickmaster
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« Reply #1 on: September 09, 2009, 03:29:42 PM »
Hywel be very careful, I have about hundred of this Russian military “black glass” tubes and they are rated at 270v so can blow in 490-500v OTS. Get some JJ 6v6s or Tube Doctor http://www.tubeampdoctor.com/shipping.php?language=en&osCsid=416c4cf4dbd615964d1167352d5ddc0f,
they can take 450-500 OK.
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wyatt
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« Reply #2 on: September 09, 2009, 04:55:35 PM »
Quote from: Pickmaster on September 09, 2009, 03:29:42 PM
Hywel be very careful, I have about hundred of this Russian military “black glass” tubes and they are rated at 270v so can blow in 490-500v OTS. Get some JJ 6v6s or Tube Doctor http://www.tubeampdoctor.com/shipping.php?language=en&osCsid=416c4cf4dbd615964d1167352d5ddc0f,
they can take 450-500 OK.


+1

Are those 6P6S? (looks like in 6П6C Cyrillic; П is "peh," which people translate to P; C is "es," which people translate to S)

A 6P6S tube is a 250VDC tube and has super-wide tolerances, so they are highly inconsistent.  They are not a safe option for any guitar amp I can think of.  This supplier is highly optimistic.




 
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Pickmaster
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« Reply #3 on: September 09, 2009, 07:05:22 PM »
Yep! 6P6S
They are great in my Laney Pro Tube 2X 6V6 but won’t work in OTS.
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hywelg
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« Reply #4 on: September 09, 2009, 09:19:18 PM »
Well they're working fine at the moment  Grin  I'll ring the supplier in the morning and see what they say. 250vDc rating does not equate to 'they're very robust tubes and will be fine at 450V' in my book.
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JD0x0
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« Reply #5 on: September 10, 2009, 01:08:31 AM »
i think JJ 6v6's are rated at 450V incase the ones you have crap out
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