SansAmp GT-2 build report (UPDATE: Sound Clip)

[Hailstorm350]

Very cool, keep up the good work guys!!

[Izzy]

I have one question, I was builing this sansamp and It looked like the Tonepad's schematics is missing one 1 M (pull down resistor) at the input. The PCB layout has 2 - 1M.
The parts list has 2- 1M . But there is only 1 -1 M in the schematic.

Or am I not being able to see anotehr 1M in the schematic?

http://img465.imageshack.us/img465/9162/untitledan9.jpg

[Izzy]

anyone?

[MikeH]

The pull down resistor (input to ground) is on the layout, but has been omitted from the schematic (or probably just never put in)  since the pull down resistor was probably (more like definately) not a part of the original design, because true bypass switching wasn't used.  The other 1M resistor is not a "pull down" resistor, look's like it biasing the opamp or something like that.  That 1m resistor is definately required, but the 1M pull down on the layout is only required if you have popping issues.  Which you most certainly will have if you don't use it.