[Amps] Update on AL-1200 T/R Problem

[Carl]

Id suggest calling Ameritron Service Dept. They would know the latest 
answers.

Carl
KM1H


----- Original Message ----- 
From: "Ken Asmus" <ken.asmus at gmail.com>
To: <Amps at contesting.com>
Sent: Thursday, February 06, 2014 11:41 AM
Subject: [Amps] Update on AL-1200 T/R Problem


> Thanks to all the replies with suggestions on how to clean the T/R relay.
>
> I finally decided to pop the cover and take a stab at solving the issue (I
> have been chasing FT5ZM a lot!).
>
> I was a little perplexed to not be able to find an open frame relay for 
> T/R
> (there are 2 other relays associated with the soft start etc. on the power
> supply side). I downloaded a schematic and found the following notation
> next to RLY1 :
>
> THIS RELAY IS AS SHOWN ON THE FACTORY SCHEMATIC.IT HAS BEEN REPLACED BY A
> NEWER RELAY BOARD. IT IS FUNCTIONALLY EQUIVALENT.
>
> My AMP is a 2006 version and sure enough there is a relay board attached 
> to
> the divider plate near the ant in/out jacks.
>
> So my next question - is there anything I can do to fix the T/R issue on
> this board?  Or do I need to replace the entire board?
>
> Thanks again,
> Ken VA3KA
>
>
>
>
> -----Original Message-----
> From: Ken Asmus <ken.asmus at gmail.com>
> To: amps <amps at contesting.com>
> Sent: Fri, Jan 31, 2014 8:38 am
> Subject: [Amps] AL-1200 T/R problem
>
>
> My AL-1200 has developed a T/R switching issue. In about 5 out of 10
> transmissions the receive does not fully come back after releasing the 
> PTT,
> A click of the mike button or a dot on the paddle brings the receive back.
>
> Any suggestions where to start looking to clear this problem?
>
> Thanks and 73,
> Ken VA3KA
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