Help me with a Simple JFET booster

[ilya-v]

I want to make a simple permanent boost  inside my distortion pedal (the Vol is to low).

I plan to build a simple J201/2N5457 booster after the tonestack (its a guv'nor) and before the volume pot.
I want to make this as simple as possible without a board just solder the components point to point in a "lump"
wire it and stick it with hot glue to the wall of the pedal.

So I basically need the values of the source and drain resistors without using a trim pot.
Also do I need the coupling cap at the input or wire without it as a simple gain stage?
Is 1K Source and 10K Drain will be good for J201 (9V)?
Can I use the same values for 2N5457?

If anyone got a link to some good reading (simple and to the point like AMZ stuff) about jfets please post.

Thanks.

[petemoore]

So I basically need the values of the source and drain resistors without using a trim pot.
  IIRC this'd be 'foolin' with Fets at GEO, Fetzer Valve at ROG...Jfets bias source above gate, and each one requires 'attention'.
  Also do I need the coupling cap at the input or wire without it as a simple gain stage?
  "No current goes through a Jfet gate, making input cap unnecessary.
  Is 1K Source and 10K Drain will be good for J201 (9V)?
  Which one..what do the notes say [see GEO/ROG for biasing info on Jfets @9v supply]
  Can I use the same values for 2N5457?
  The bias needs of each Jfet vary from every other one.
  If anyone got a link to some good reading (simple and to the point like AMZ stuff) about jfets please post. ^
  The Jfet testjig will allow fitting circuit stage DC bias R values to particular Jfets, a bit of masking tape helps ID the Jfet under test.
 
 

[dano12]

http://www.hawestv.com/amp_projects/fet_preamp/fetpreamp1.htm