Re: [amsat-bb] RF trips power supply

[Glenn Little <glittle@xxxxxxxx>]

Hi
I had the same problem on a home brew supply.  The problem ... 
rectification in the gate circuit of the crowbar SCR.  Solution, polace
a bypass capacitor as close to the gate of the SCR as possible.  May
also need to place a choke in series with the gate of the SCR and bypass
it's input.

73
Glenn
WB4UIV


"Cordill,Jim" wrote:
> 
> I know this is off topic, but I thought I would try here first.  I have an
> Astron RS-12A power supply that
> I use to power my satellite rig that has a problem, any time I key my HF rig
> the power supply will
> shut down.  It seems to do it on all HF bands, and even on low power.  My
> other Astron power supplies
> work fine.  Could it just be this model, or has an RF bypass cap failed
> somewhere.  The HF rig is powered
> from an Astron RS-35M and sets about 3 ft from the 12a on a shelf about 1.5
> ft below the rigs which sit
> side by side on the table above.
> 73 Jim KI0BK
> 
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-- 
Glenn Little
Engineer
HARK Systems, Inc.
Voice (843) 764-1560
Fax   (843) 764-3692
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