Too much gain

[guidoilieff]

1 - Hi. I made the catalinbread's sabbra cadabra, SFT and the RAH. The three of them have waaaay too much gain. I was wondering if just an input resistor would do the trick or if there is a more sophisticated approach to fix the problem.


https://postimg.org/image/r9k63ypl1/ Sabbra
http://web.fc2.com/jump/?url=http://homemadefx.web.fc2.com/SFT.BMP SFT
http://2.bp.blogspot.com/-bnlTjGc7DfM/T7zg-zA9OPI/AAAAAAAABW8/fXwHxSufzww/s1600/catalinbread+rah.PNG RAH


2 - Also watched a video about using lamps for lowering the distortion on opamps and was wondering how to implement it on transistors https://www.youtube.com/watch?v=vBsSASge7ls Any idea?

Thanks and sorry for my english.

[Plexi]

By experience, as I can see, that could be some miss/bad biased Jfets and mosfets.
They're a really inconsistent, and as R.G. told me, you usually need to be picky about this.

Which ones do you used?

About Sabbra C.: is that some kind of treble booster at the bigining?

[anotherjim]

About Sabbra C.: is that some kind of treble booster at the bigining?

It looks like an NPN range master with variable frequency to me.

As Plexi says, if it won't clean up, check each stages output DC (before the next interstage cap). Anything too close to 0v or +9v indicates a bias issue.