GGG Distortion plus C5 mod

[foozertone]

Can anyone tell me about the C5 (10pf cap) mod(?)   What effect will taking this out or leaving it in do?

Jeff

[wampcat1]

Can anyone tell me about the C5 (10pf cap) mod(?)   What effect will taking this out or leaving it in do?

Jeff

schematic please?

[Krinor]

Distortion+ schematic:

http://web.archive.org/web/20070329032312/www.generalguitargadgets.com/diagrams/dist_plus_sc.gif

[hellwood]

i think it prevents oscillation?

[oskar]

At higher gains amplifiers gets unstable. Having a small cap in the feedback path like this prevents the
amp from oscillating. It is a lowpass rolloff thing but you'll hardly notice if it's in or not... unless off course
the thing freaks out because you left the cap out...

[foozertone]

I'm working from a PCB acquired from GGG. If I leave out the C5 do I have to put a jumper in it's place? Sorry if this is stupid.

Jeff

[fixr1984]

No jumper

[foozertone]

As I lookcloser it says that the following components are optional: R1, D3, D4 and R11. What happens if i leave these out or in. I really have no idea what is best for me.
Thanks for all your help.

Jeff

[hellwood]

D3 is for a different clipping diode configuration. i hear the sound change is minimal but worth investigating. D4 is your light (LED) if you want to know if your pedal is on or off (as if?) R11 keeps your light(LED) from burning out and i couldnt tell you what R1 is for. maybe it helps keep it from popping w/ true bypass w/ LED?

[foozertone]

I ended up finding this out for myself. Sorry to waste your time, but I just love the sense of community here. Makes my first tentative steps more sure.

Thank you.

Jeff