Load resistor values for opamp boost pedal.

[Chill]

I drew up a quickie boost pedal schematic for a TL072.  What value load resistors (unmarked value on the schemo) would be reasonable?  I thought about using 10K's to keep it simple.

And, do I even need the buffer stage if I'm using 10-16K DC resistance humbuckers like the Duncan Distortion and Custom?

[d95err]

I'm no opamp or impedance expert, but I think none of the "load" resistors on the schematic are necessary. The output from both opamps are already properly referenced to the bias voltage.

The buffer stage and boost stage in your schematic will have the same input impedance (about 1M I think, decided by the bias resistors), so the buffer is not really necessary. Unless, you want buffered bypass instead of true bypass. Take the output for the bypass from between the buffer and boost stage and use a SPDT switch to select boost or bypass at the output.

[brett]

That's right, omit the unmarked resistors and things will be fine.
But don't forget a cap between that 1k resistor and ground.  10uF to 22uF would be a good value.
cheers