Comments on: Repairing a Bad Horsie 2 Wah Pedal with Power Damage

By: Alan

Alan — Mon, 12 Jul 2010 19:06:47 +0000

Great description of the troubleshooting process. Thanks!

By: Richard D. Bartlett

Richard D. Bartlett — Fri, 09 Jul 2010 02:37:59 +0000

There’s a few spare gates on that 4069, you could use one to pre-boost the signal, instead of needing a separate distortion pedal.

E.G. http://folkurban.com/Site/CMOSBoost-695.html or http://folkurban.com/Site/CMOSDrive-696.html

Another simple trick to improve the sound of many pedals is to throw a
really high-impedance FET buffer on the input (I use an MPF102 and 1M5 resistor). I see in this instance there’s already an opamp performing that function but for what it’s worth I prefer the sonic qualities of the FET. See http://www.muzique.com/lab/buffers.htm

By: jproach

jproach — Fri, 09 Jul 2010 02:30:49 +0000

You can measure the internal resistance of your nimh if you want to backtrack and get a rough idea of how much current it was using.

A new cell is around 2Ω, an older generation ~6Ω, a well used cell I have no idea.

By: ppvi

ppvi — Thu, 08 Jul 2010 07:15:25 +0000

Just great.

Just missing a current measurement to have peace of mind.