[Boatanchors] Here's a vintage stumper..

[WA5CAB at cs.com]

No, the 1616 is a filament type vacuum diode rated at 6000 PIV., 800 MA peak, 
130 MA average and 2.4 A fault.  As to the noise, I'd suspect something 
inside the transformer or the first filter capacitor.

In a message dated 5/1/2005 11:55:23 PM Central Daylight Time, 
vic at rakefet.com writes: 
> >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.

Robert Downs - Houston
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MVPA 9480
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