I have used, sold and repaired LOTS of Astron supplies. Mountain top
repeater sites included. I have never experienced a "fire" inside. Nor
have I seen a circuit board get hot or overheat.
I have had the MOV that is across the AC input explode due to a voltage
spike, but the supply kept on working.
I have also never seen one without a pot to set the voltage output.
Your experience with fire seems odd to me.
A linear power supply is incapable of generating RF noise unless there
is a DEFECTIVE diode generating hash.
73
Jim W7RY
-----Original Message-----
From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com]
On Behalf Of Harold Mandel
Sent: Saturday, September 02, 2006 7:59 AM
To: 'm.ford'; amps@contesting.com
Subject: [Amps] Astrons catching on Fire
Astrons catching Fire!?
Dear Mike and the Group,
What information can you offer on Astron power supplies
catching on fire?
Is there a suggested remedy to forestall or prevent such
catastrophe?
This is a Safety and Health related issue and deserves
the utmost consideration.
Thanks,
Hal Mandel
W4HBM
[snip]
The Astrons use very marginal filter caps. Add to that the component
laden pc boards mounted directly to the screw terminals and you are
tempting
fate.
But the Astron RS-50 that I had produced quite a bit of acrid smoke when
the
pc board caught fire. The RS-70 did the same thing but I was wise to the
smell
and shut it down before ignition.
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