Hi Carl,
Perhaps, a shorted turn?
73 & Good morning,
Marv WC6W
http://wc6w.50webs.com/
--- On Sun, 11/16/08, Carl <km1h@jeremy.mv.com> wrote:
> From: Carl <km1h@jeremy.mv.com>
> Subject: [Amps] Strange relay problem Alpha 76
> To: amps@contesting.com
> Date: Sunday, November 16, 2008, 4:40 PM
> Ive not seen this failure mode before and wonder what causes
> it.
>
> The Power On relay is a simple DPST 120VAC job. It all of a
> sudden
> started buzzing with the amp in standby.
>
> Pulled the coil leads off and hot wired and it still
> buzzes.
>
> Fired off the DC supply and it works just fine on 120VDC
> now, no
> overheating.
>
> What gives? I understand the construction difference
> between AC and DC
> relays, coil impedance, etc.
>
> Carl
> KM1H
>
>
>
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