[sdiy] guitar effects (small stone Electro Harmonix) vs synthesizers

[Antti Huovilainen]

On Sat, 3 Oct 2009, mailing gigaspeeds wrote:

> Lately I bought the most recent version of the Small Stone electro 
> Harmonix. It's intended as a guitar effect and I notice a drop in 
> volume/amplitude when connecting my synthesizers to it. Can that be 
> solved ?

http://www.freeinfosociety.com/electronics/schemview.php?id=1181

You could try replacing the 100k input resistor with a smaller value (say 
10k). That should give you a 2dB boost.

Sadly the pedal isn't a very good design as far as the input / bypass 
circuitry goes - the input is always connected and the input impedance is 
far from high enough (only 370k).

> What irritates me the most (and makes it totally useless for live 
> performance) is that when I hit the enable button (footswitch) I get 
> this spike in my speakers that nearly causes my eadrums to pop :-p. Is 
> there a way to buffer that spike so I don't hear it when I enable the 
> effect ?

Sounds like the effect is broken. I had the same issue with a fuzzbox when 
I miswired the footswitch.

Antti

"No boom today. Boom tomorrow. There's always a boom tomorrow"
   -- Lt. Cmdr. Ivanova