Benson preamp (Son of Ben) build

[MrHugh]

This one is special! It took me a bit of forum searching to get the jfets biased (I’m still not really sure how to do that properly)... but I have it sounding pretty good!

 

[steelplayer]

Nice! Super clean build.

 

[Barry]

Looks great!

 

[Chuck D. Bones]

Looking good. If you like the sound, then you got the biasing right.

 

[Bobbyd67]

Here's a partial schematic from Fsb forums there are voltages on each transistors. You can start from there and then adjust to your liking.

 

[soothsayer86]

Trimpot Adjustment - Son of Ben

The build doc says Is there a way to test trim 1 without removing is from the enclosure? For Q2&3, is it the same as when biasing a fuzz face? One probe to ground and the other on the drain? Thanks! *Edit for future forum searchers* "son of ben" isn't searchable because the words are too...

forum.pedalpcb.com

this post has some useful information that I used when I built my first SOB