[sdiy] reamp?

[Tom May]

Don Tillman <don at till.com> writes:

> The typicial guitar pickup has a DC resistance of around 3000 to 5000
> ohms.  There's a lot of inductance, somewhere around 1 Henry or so,
> and some capacitance, so the impedance can get pretty high near the
> resonant frequency, which might be around 3000 to 8000 Hz or
> thereabouts. 
> 
> The load impedance affects the sound quality of guitar pickups, and in
> general you don't want to run a guitar into less than 1M ohm.  There
> are some stomp boxes that violate that rule, chalk it up to
> quirkiness.  The worst offender is probably the wah-wah pedal (Vox,
> Cry Baby, Maestro, whatever, they're all the same circuit).

The Cry Baby GCB-95 I bought about 10 years ago has an emitter
follower buffer on the input.  My couple year old Vox V847 is the same
circuit w/o the buffer but with a more reasonable pot that doesn't put
the usable wah range into about 1 degree of travel.  An older Cry Baby
I have is the same as the Vox.

Ob diy: actually I gutted the GCB-95 and it's now a CV controller.

fTom.