Based on your explanation there’s a short in the antenna relay line.
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On Friday, July 29, 2022, 5:19 PM, donroden@hiwaay.net <donroden@hiwaay.net>
wrote:
Isn't that the way the relay is supposed to work ?? W4DNR
On 2022-07-29 11:30 am, Ed Swiderski, KU4BP wrote:
> I have a confusing problem with my AL1200. During operation when the
> stdby/oper is on, the received signal is very weak. Switching back to
> standby and the signal level is fine. Checked the relay and it was
> operating correctly. Engaging with 12v applied to it. With no power to
> the amp and a rx signal going through, manually engaging the relay
> weakens the signal. Releasing it and it's back to normal. Cleaned the
> contacts using the method described by W8JI on his site. Still no go.
> Stumped on where to look next to track this down. A tests on another
> radio produced the same results.
>
> With no power to the amp, I connected my RigExpert analyzer to the "RF
> in" and a dummy load to "RF out". Doing a sweep, the SWR reads around
> 1:1. Engaging the relay by hand shoots the SWR very high. Goes back
> down when released.
>
> That's the best symptoms I can give. Any suggestions would be an
> immense help.
>
> Thank you,
> Ed KU4BP
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