Sandspur Fuzz biasing

[apm588]

Hi everyone,

Kind of a dumb question. I am starting a sandspur fuzz build and I was wondering how to "bias" it. I know there are two internal trim pots but was hoping someone could walk me through how to bias them with a multimeter. Specifically

1. Where do I put my multimeter poles on the circuit, and what values should I be biasing each towards?

Any help would be greatly appreciated. Thank you.

 

[bronomo]

Our own resident @jjjimi84 has a video series on the sandspur that includes biasing. Part 4 has more fiddling of the internal trimmers but this one has the multimeter walkthrough

 

[apm588]

Our own resident @jjjimi84 has a video series on the sandspur that includes biasing. Part 4 has more fiddling of the internal trimmers but this one has the multimeter walkthrough

This is exactly what I needed! Thanks for sharing. And thanks to @jjjimi84 for such an amazing video series. This is already a huge help

 

[jjjimi84]

This is exactly what I needed! Thanks for sharing. And thanks to @jjjimi84 for such an amazing video series. This is already a huge help

Anything for the community! I am glad it was helpful!

 

[Mir9]

On my build, I made the "clean" trim pot into an external control to work with different pickups. You're meant to use your guitar's volume control for that, but this helps if you use extra hot humbuckers, like I do.

That mod is offered for $25 on the real ones. This picture is from a nearly 300 page thread, but you can find the mod option on the official order page.

Analogman Sunface club

Here’s my Sunface collection. Latest addition is the 2sb175 direct from AM. It sounds awesome! Had them increase the max volume on it and it exactly what I was looking for. Added dc jacks on a couple others and can tell the difference in sound vs battery. Sounds a little brighter plugged in...

www.thegearpage.net

"Bias" is easy and that section is meant to be constantly adjusted to taste by the "Sun Dial it's in series with.
While you usually set and forget it on these type of pedals, the feature here is being able to to constantly adjust those controls to change character.