[sdiy] Hum & Buzz

[Ingo Debus]

> Am 17.09.2017 um 21:18 schrieb Michael Zacherl <sdiy-mz01 at blauwurf.info>:
> 
> After experiencing lots of hum and buzz, as one would have with a ground loop, I disconnected the pickups and wired the two inputs to ground to see how the bare circuit would perform.
> To my surprise the hum and all other noise was almost gone.

Are you sure it’s only hum? Have you checked that the preamp doesn’t oscillate?

Ingo