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@isp.ca>
To: <amps@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
>
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|