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[AMPS] SB-220 C4 failure

To: <amps@contesting.com>
Subject: [AMPS] SB-220 C4 failure
From: wrt@eskimo.com (Bill Turner)
Date: Sat, 05 Jul 1997 19:48:49 GMT
On Sat, 5 Jul 1997 14:11:43 -0400 (EDT), W7OM@aol.com wrote:

>The 20 mfd electrolytic cap in the 120 vdc power supply ruptured.  This
>failure occurred with a possible tube short.  Do not believe there is a
>correlation.  Replacement is simple, BUT would like to know if anyone has had
>a similar failure and is this is the effect of another failure.  I will
>replace the rectifier diode too as it shorting would cause the cap to go.
> Diode passes the simple short/reverse resistance checks.
>
<><><><><><><><><><><><><><><><><><><><><><><><><><><><>
In my 38 years of electronics, it's been my experience that
solid-state diodes never short and then repair themselves.  If it
checks good, it is good.  They're like a fuse in that respect.

One should be cautious about using words like "never" and "always",
but in this case I believe it's true.

73, Bill W7TI


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