[Amps] FLAKY AL-80A

[N3XX]

Sounds like maybe the relay is never operating.  So all current would be 
through the resistor instead of the relay contacts.
Just a guess, but maybe worth checking.

73,
Tim - N3XX

----- Original Message ----- 
From: "Mr. and Mrs. Magoo" <magoo at isp.ca>
To: <amps at contesting.com>
Sent: Tuesday, March 31, 2009 4:19 PM
Subject: [Amps] FLAKY AL-80A


> I'm hoping someone can offer a suggestion on a problem I am having with a
> friend's amp.  Initially it refused to turn on-the resistor in the
> step-start circuit was lumpy, discoloured and open so I replaced it and 
> all
> appeared peachy.  I turned the amp on and off several times and it 
> appeared
> cured.
>
> The owner used it for about 10 days and then it quit again so he brought 
> it
> back.  When it failed for him, the resistor got very hot...he removed the
> cover, held down the safety switch and observed it glowing before he shut 
> it
> down!
>
> I checked the resistor and it is fine...it has not changed value.  I did
> remove the relay to check for pitted/arced contacts and re-soldered
> everything.  It works fine right now.  But I am afraid that it really 
> isn't
> cured.
>
> Anyone have any idea about what the REAL culprit might be?  I'd love to 
> send
> this puppy back for good.
>
> 73, Bill VE3NH
>
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