latest version of the Sopht amp with a bit of theory

[Alpha579]

soz, but what is the average output pk2pk from a guitar?

[tazwolf]

Alpha: slajeune posted it in this thread a way back - 100 mv or there abouts.

/taz

[slajeune]

Hi Taz,

concerning the bias of the first gain stage.  I guess you could bias it as close to 0 as you can (i.e. -0.05).  The only problem I see with this is you don't have enough 'headroom'.  Say you want to use a booster or a pedal that boosts your guitar, the first stage will automatically go into asymetric cliping.  If it were properly biased (i.e. mid point) it would be able to cleanly handle the boosted input and if it did go into cliping, it would be symetrical.  I don't think that having the tube closer to 0 change it's gain, only it's operating point.

Thanks,
Stephane.

[Alpha579]

One thing, isnt it good to have some asymetrical clipping to get even order harmonics?