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Old 26th May 2005, 04:06 PM   #1
9900778 is offline 9900778  Hong Kong
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Default 46 tube user

anybody has use #46 tubes??
is it better sound performance than 45 tubes??
It is worth to try??
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Old 26th May 2005, 04:48 PM   #2
SY is offline SY  United States
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I don't think they're interchangeable.
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Old 26th May 2005, 04:53 PM   #3
Giaime is offline Giaime  Italy
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Instead I find on the ned many cheap 47s, is there someone that has used them? Maybe for a SE?
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Old 27th May 2005, 01:47 AM   #4
amperex is offline amperex  United States
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The 46 are regarded as a great driver tube. With the G2 connected to the plate, they operate Class A. I suspect the 46 would sound good as an output tube. I also guess the 45 might sound a little better, but at $50+ each for NOS, I would try that 46 tube.
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Old 27th May 2005, 04:54 AM   #5
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The '46 while triode strapped has been used by a few people as an output valve by some people - doing a Google search turns up some schematics.

Triode strapped, at 250Va and 22mA, into 6400 ohms, it will give around 1.25W. Not quite the same as a '45, but somewhat similar.
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Old 27th May 2005, 08:06 AM   #6
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Gary Pimm has made a PP with the 47

http://home.pacifier.com/~gpimm/47.htm



Quote:
Instead I find on the ned many cheap 47s
Where? Where?
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Old 27th May 2005, 09:56 AM   #7
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wasn't there also a simple 47 SE in a recent audioXpress -- i went thru my tube collection and came up with a single example.... now if i could figure a use for all the 28 (or were they 26s -- time for bed ) i have.

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Old 28th May 2005, 03:42 AM   #8
gerryc is online now gerryc  United States
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Default Re: 46 tube user

Quote:
Originally posted by 9900778
anybody has use #46 tubes??
is it better sound performance than 45 tubes??
It is worth to try??
Yes, absolutely worth a try. A couple of years ago I threw together a single channel (triode strapped) 46-based SE amp. Used a 6SL7 as a driver. I experimented with both classic grounded cathode and SRPP for the 6SL7 driver. Sounded a little different but I can't say definitely what I preferred. I also just used whatever junk PP output transformer was on the chassis I had (from Eric Barbour's idea for Single-Ended Glory for Under $100 GA 1997 Vol7 Num3). Ran the 46 at about 250 volts and 25ma.

I never built a "nice" version with two channels since I wanted to pursue a higher power design. But it definitely sounded nice even with one of my speakers which are something less than 90dB efficient. But definitely only enough power for a small room.

gerry
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Old 30th May 2005, 11:51 AM   #9
Datubie is offline Datubie  United States
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