Sunn Model T Fets biasing

[Guzz]

Hi all,

Regarding the Sunn model T preamp that's on the frontpage, I was wondering how I'd go about biasing the FETs if I wanted to run it at 18v instead of the original 9v.

Do I just have to double the original voltages for the fets ? So let's say one FET had the be biased at 6.5V if I run the effect on 9V, I'd have to bias it to 13V if I ran it at 18V ?

Cheers.

[ibanez48]

If your going to run 18 volts bias the fet around 9 volts maybe a little more or a little less Just depends. If your going to run 9 volts bias fet around 4.5 volts.