[Amps] Alpha 78 problem

[jeremy-ca]

I dont have the manuals handy but Id suspect that 15A ceramic fuses are 
sufficient on a 240VAC line. I use 12A in 1200W output amps.

Carl
KM1H


----- Original Message ----- 
From: "Carol Richards" <n2mm at comcast.net>
To: <amps at contesting.com>
Sent: Saturday, November 10, 2007 10:45 AM
Subject: [Amps] Alpha 78 problem


> Hello........
>
> During the last contest I began to develop a problem. When I key the 
> alpha, non qsk mode, everything is fine. When I let up on the key the amp 
> continues to mute the receiver. If I tap on the left side of the amp, the 
> receiver comes back to life. Looking at the schematic, it appears that 
> K-10 (dpdt/24vdc) relay is sticking or k-11, 24 vdc reed relay is 
> sticking. I suspect the former.
>
> Knowing Alpha, K-10 is a specially designed relay. Any thoughts before I 
> have to call them?
>
>
> Also....does anyone know exactly what type of fuses the Alpha 76PA and 
> Alpha78 use? The manual omits this info. I seem to recall something like 
> MDA-20 amp ones.
>
>
> Carol
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