Hi all - first time post. And a noob question to kick it off:
I've just bought a GGG Late 60s Fuzz kit and I'm confused by differences in their schematic and layout. The schem. shows R1 and R12 (both 1M, guessing they're for de-popping the switches). But these two Rs are not in the layout. Not indicated as optional either. Anyone know which is accurate: schematic or layout?
Thanks!
Charles
It looks like there is a place for R1 on the layout. The part just isn't listed on it. Right where the input wire meets the board there is another pad about a resistor's distance from ground. You can put R1 here.
http://www.generalguitargadgets.com/tech-pages
GGG has bypass options pages.
the 1meg value not shown in 'stripped down' fuzzface schematics would be for keeping the input/output capacitors from storing a charge. Otherwise discharging them when signal switching [when the bypass switch connects them to signal path] may cause pop.
Thanks for the quick replies, fellas. I'll definitely install these two Rs then. I start building tonight!
Cheers,
Charles
Noticed this too in my build... I put R1 on the input wire. But where does R12 go again? I left it out....
Just noticed this too. There is no R12 on the pcb silkscreen. The schematic shows R12 connected btw the wiper (pin 2) of Volume pot and ground. Have to find a clever place for R12. Maybe btw SW1b (the leg common with R10 / pin 2) and J2 / Sleeve.
Be careful about that. If you connect to the common lug of the switch that resistor will still be in the signal path while in bypass.
The easiest place would be directly on the volume pot.
The FF volume pot = 100k signal path to ground at all times, more than sufficient as an output cap drainer.
Quote from: petemoore on September 14, 2010, 10:06:48 PM
The FF volume pot = 100k signal path to ground at all times, more than sufficient as an output cap drainer.
Thanks - let's just leave it off then.