[Elecraft] K3S Receiver Spurious

[Jim Brown]

On 12/5/2023 9:33 AM, Michael Tope wrote:
> I did move the Astron RS-35 that powers the K3S off my UPS a few weeks ago.

See this note on a manufacturing issue that I found in several of my 
Astron supplies that can cause instability. The bond between the AC 
green wire, V-, is insulated from the chassis by paint at the mounting 
leg of the old-style terminal strip next to the V- terminal. The defect 
can be confirmed by an ohmmeter measurement between the green wire at 
the plug and the chassis.

http://k9yc.com/PowerSupplyBondingAndAudioDistortion.pdf

73, Jim K9YC