[Amps] Ameritron AL-80A Receive muted - relay?

[Bill W5WVO]

Have the same problem with the Harbach replacememnt TR relay in my converted 
SB-220, and am planning the same attack with the emery cloth once I get back 
from holiday vacation. Was considering buying a contact burnishing tool from 
McMaster-Carr, but since I have some fine-grade emery cloth, I figured that was 
probably overkill. :-)  Why haven't I done it yet? Just pure laziness. Whenever 
it goes open on RX, I just key the mic button a few times quickly, and it comes 
back. LOL  Sheesh, what some hams will put up with!

Bill W5WVO


Bill, W6WRT wrote:
> ORIGINAL MESSAGE:
>
> On Tue, 22 Dec 2009 11:13:54 -0700, Tomas Hood
> <nw7us.heliophile at gmail.com> wrote:
>
>>  I've not yet explored the circuit, but wonder if this
>> is a typical issue, perhaps a sticky relay?  Where should I focus my
>> inexperienced troubleshooting mind?
>
> REPLY:
>
> I have an SB-1000, a clone of the AL-80A, and I have experienced the
> same thing. My problem was the T/R relay. Polish the contacts with
> some very fine emery cloth, clean off any dust remaining and you
> might have to bend the contact ever so slightly. Should fix it right
> up.
>
> 73, Bill W6WRT
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