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In Reply to: Russian military 6C19PI or 6c19n-b output tubes, unobtanium ? posted by Fred J on March 9, 2005 at 11:27:30:
Looks like the tube to me. Seems like you would need a lot of them to make any power.
Follow Ups:
You're at least partially correct, my TS T-16 OTL has a compliment of 16 of those puppies, they're apparently a Russian military tube designed for Mig Foxbats and perhaps other of Ivan's aircraft, as a result they're reputed to be very durable and stable(they'd have to be with the temperature variations and G forces etc) and non microphonic, etc.
Bruce Rosenblitt Transcendent Sound)was impressed with them enough to design this amp and I suppose it's more powerful predicessor T-8 as well from the ground up around these Mig tubes.
I've just started using it yesterday afternoon and playing around with different preamps, so it'll take a week or so before I'll feel like I could render an an accurate balanced jusdgement, but so far if anything it's cleaner than my 45 SET AMP (which is no mean feat) and it's 15 watt's/ch seem more like the 75 watts/ch. of my Solid state Moon 1.5 Integrated. the Power supply, Preamp, and rectifier consists of 1 each 12au7,12ax7 and 12at7 per side respectively and they are a motley assortment of generic Chinese and Yugo tubes, I'm going to dig out or buy some decent NOS tubes,just to make me feel better ;-)
but I believe it's a truly great amp and sounds WAY better than it would seem to have any right to for the money and I am however still a pretty ignorant tube amplification nephyte, it's amazingly tolerant of the SS pre's I've tried it with, and sounds incredible to me, then again my little 45 SET was about 1.2 or 3 watts/ch and clearly not fully adequate for my Fostex 208 driven DIY(98 or 99 db)TQWT's for anything beyond modest nearfield listening.
egards FredJ
Fred, Are you saying that the T16 uses 16 output tubes to develop 15W of power?
Yes the T16 (stereo) uses 16 tubes to get 15 watts. But don't jump to conclusions! (1) the 6C19PI is a miniature base 9-pin triode (like a 12AU7, but taller), and (2) contrary to expectations based on other OTL circuits, the waste heat of the amp is low, less than that from two 100 watt lightbulbs.
It does seem that extra power really makes a difference. Even with the efficiency of the Fostex, 3 watts just doesn't do it!Enjoy!
I use 45 SET and 2a3 ,300b on fe208e sig to great effect.But look forward to giving Freds OTL a listen.
Have your people calll my people and we'll do lunch ;-)
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