[TenTec] Century 21 audio hum

[Josh Gibbs]

Stuart,

Aside from pulling the bridge rectifier out and testing each diode, is
there a way to tell if one of the diodes is open? I'm trying to visualize
what having one open diode would do... wouldn't it become a 1/2 wave
rectifier?

Here is what the ripple looks like, measured at the big filter cap:

https://drive.google.com/open?id=0B_pjAwEfeYcdXzQ5LS1URkx6MjQ

It's clearly 120Hz, about ~300mV P-P.  The PS is putting out the correct
voltage. Ripple on the regulated output is nil.

Thanks,

-Josh WA7FPV

On Tue, May 30, 2017 at 1:42 PM, Stuart Rohre <Rohre at arlut.utexas.edu>
wrote:

> But if one diode in a bridge rectifier opens up, you have a off balance
> power supply DC bus.
>
> Stuart Rohre
> K5KVH