[Amps] Alpha 89 soft fault

[Bill, W6WRT]

ORIGINAL MESSAGE:

On Mon, 25 May 2009 12:06:40 -0500, "Robert Pack" <nx5m at txcyber.com>
wrote:

>One of my Alpha 89's has been acting strange.
>While transmitting, it occasionally has a soft fault......when I toggle the oper/stby switch back to oper, it again works but ends up faulting again at some point.
>It SEEMS to work fine at lower power, say up to abut 600w or so.
>There are no leds blinking when it faults to tell me what the fault might be.
>I have sent a message to Alpha but they are likely closed today so just thought I'd ask here if anyone has had the same problem and a possible fix.

REPLY:

 Does it do it  on a dummy load? You could have a loose connection in
the antenna or coax that momentarily drives up the SWR. If you have
several antennas, does it do it on all of them?

73, Bill W6WRT