Tube preamp. "musical tube"

[Tom Baldwin]

I have been thinking of rewiring one of my old SF Champ amps. I noticed the
oldest Champ ( 5C1) used a 6sj7 preamp tube. Also an old Bassman ( not sure
which incarnation ).

Are these tubes any kin to each other? 6sj7 and 6sn7. Most people lean
towards the 12ax7 for this type "tweed" mod. Any comments on different tonal
character between the 6 and 12? Your comment on "musical tube" has me
wondering.


Tom B.


---- Original Message -----
From: Bill Layer <blayer at uswest.net>
To: Synth-DIY <synth-diy at mailhost.bpa.nl>
Sent: Wednesday, December 08, 1999 8:24 AM
Subject: Tube preamp.


>   Hi,
>
> Eric sent me a rather sexy (and very simple) tube preamp
> uses 3 tubes for stereo, one rectifier and two 6sn7GTs.

> Zout. In any event, the 6SN7 is a tube so musical, that it is hard to

> current Atma-Sphere amplifiers use the 6SN7 exclusively for both voltage
).
>
> What I'm saying is, if Eric offers a 6SN7 design, it would be hard to go
> wrong building it. If you are looking for a load of parts, try and find a
> Hammond S series chord organ. They are worthless, but have