hiwatt tone stack

[the_stig]

Hi,
long time lurker... first post
I have problems with simulating the tone stack from hiwatt schematics available here: http://hiwatt.com/manual/DR103_PDF/DR103_preamplifier.pdf
my drawing looks like this: http://img213.imageshack.us/img213/9027/hiwatt1nz6.jpg

My problem is that the pots do not do a thing  Is there an error in the schematic ? I would appreciate any help.

Regards,
Philip

[AL]

Philip,

You don't have any pots on your drawing? Was this done on purpose? All of the pots have been subbed with two resistors.

AL

[JHS]

Forget the original values in the Hiwatt tonstack, for a FX I would use 1/10 Rs and 10x C for the caps and a buffer in front of the tonestack.

The original tonestack was designed for an amp, for a FX-box the filters must be altered too(more mids, less highs).
Look a the Reverend Drivetrain schem and study the tonestack, it's a good example for an adapted tonestack in an OD.

JHS

[Stompin Tom]

By the way, someone was trying to work this out over at the ssamp site:

http://www.ssguitar.com/index.php?topic=229.msg2122;topicseen#new

Not sure if that will help... they got it working, but it looks like it still needs tweeking.