• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

46 tube user

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#4
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.
 
#5
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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#8
9900778 said:
anybody has use #46 tubes??
is it better sound performance than 45 tubes??
It is worth to try??
Click to expand...

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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