7 pin pentode preamp

[gary sanders]

This is just for fun to see what happens.Anyone ever built something with a 6AU6 or similar? I have some sockets and tubes and thought this would be a good project in between a real amp.(Maybe put a 6V6 PP on the other end,just got a OPT for a buck something from Ebay)

[Phil_S]

I used a 6AU6 in a Vox-like thing. I didn't care for it. I have a small pile of them, maybe 6 or 7, and they were either noisy or flat sounding. They were all used tubes that came in a lot I bought that had other tubes I wanted, so, maybe all bets are off and it was just bad luck. It's the only amp I have built that I didn't care for out of about a dozen.

[Cliff Schecht]

I didn't care for the 6AU6 either. The one thing I liked about it in the amp I built (was two cascaded 6AU6's) was that it can be setup to have a lot of bloom. A large plate and screen resistor will help incur this effect.

[Kagliostro]

Matchless Clubman uses a (paralleled) 12ax7 double triode as V1 and a 6SH7 pentode as V2

http://www.el34world.com/charts/Schemat ... lubman.pdf

6SH7 = 6AU6 ( see here http://www.el34world.com/Forum/index.php?topic=11691.0 )

Kagliostro

[10thTx]

5654 is a nice 7 pin tube with good tone.

with respect, 10thtx

[gary sanders]

I was thinking of one of the 6S*7 tubes too,like the old fenders used

[gary sanders]

5654 is a nice 7 pin tube with good tone.

with respect, 10thtx

Have to look that one up,was it ever used in a production model?

[10thTx]

Have to look that one up,was it ever used in a production model?

I have no idea? However, I used a dual pentode approach on this amp.
The pin out is the same as 6AU6. I also tried some Tung-Sol 6AU6 in that position and liked those also.

with respect, 10thtx

[gary sanders]

I got a few NOS sockets and tubes to play with,got the tubes in a lot for my stereo and had some left over.Will give that one a try that was posted.I have enough stuff to give it a PP 6V6 power amp.Anxious to start this one!