the STAB pot on the ZVex Fuzz Factory

[mordechai]

It seems like this control is similar to the Beavis Audio "voltage sag" mod for the BYOC Fuzz Face project.  However, the Beavis mod calls for a 10K pot, which the STAB control on the Zvex FF is 5k.  Would using a 5k pot provide greater depth or control over the amount of voltage sag since its covering a smaller range?

[John Lyons]

More resistance = more voltage/current limiting.
depends on the circuit as to which works better.

[MikeH]

No- using a 5k instead of a 10k would just give you less "voltage sag".  The Fuzz Factory probably only uses a 5k because after that it probably becomes unusable; it's already pretty unstable with a 5k pot.  Some circuits I've used higher than a 10K pot and still had effect the whole pot travel.  As John said, the optimum value on a "sag" control varies from circuit to circuit.