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Vintage threads from the first ten years

Rat pedal mods

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9/15/1999 10:42 AM
Mark Abbott	Rat pedal mods I recently tried to look up an article on Rat mods at GEO without any luck. Could anyone tell me the mods possible on a Rat? (I'm quite interested in more volume.) Thanks Mark.

9/15/1999 12:25 PM
GFR	Use LED's for clipping. This will give you more volume and that's what's done on the Turbo RAT. You can also try some zener diodes for even more volume.

9/15/1999 3:03 PM
Lou	I have a rack mount dual rat unit, will these mods work on it. I'm trying to more volume. Cheers Lou

9/15/1999 8:50 PM
Gus	If you want to keep the tone the same you could change the output buffer to a gain stage(x2, x4)you would have to make sure the in z to the gain stage was about the same as the buffer. IMO I don't like the sound of leds used ina rat type dist. there seems to be a different harmonic content due to the greater signal swing before the clipping of the waveform.

9/15/1999 8:47 PM
Bjorn	I said it before - try germanium diodes! A big improvement. You'll need at least three to substitute one original (at least I did). Good Luck. Bjorn

9/18/1999 12:19 PM
Mark Abbott	Dear Bjorn, have you tried the mismatched diode mod mentioned in GEO's tube screamers mods? Just a thought. Mark.

9/22/1999 1:12 PM
Bjorn	Mark, No, I haven’t read RG:s paper. I did try with one original and three germaniums. Very nice. However, changing to all germaniums did sound best to my ear. I did also try several different germaniums but the difference was very subtle. Bjorn

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