[Boatanchors] Here's a vintage stumper..

[Vic Rosenthal]

StephenTetorka at cs.com wrote:

> I have an issue of larger importance - my modulator power supply is causing 
> line noise? that sounds like a Geiger counter in 'fast count'...not a typical 
> 60 or 120 cycle hummmmm.
> 
> The power supply use 2 x 1616's to power the 2x807 for my 1948 rack rig.

I guess 1616's are mercury vapor rectifiers?  These are sometimes prone to a 
form of oscillation (called 'hash').  This is cured by putting RF chokes in the 
plate leads (called 'hash chokes', of course!).  Someone here will be able to 
tell you the appropriate inductance for a hash choke.

-- 
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco