On the encoder board, directly under the reed socket is a molex-type pin.
grounding that kills the TX pl...( as with the factory paging option)
Lance N2HBA
----- Original Message -----
From: ve3hxp
To: [email protected]
Sent: Tuesday, May 04, 2010 9:02 AM
Subject: [Repeater-Builder] Re: Micor PL encoder modification (TLN5731A)
Hi Paul, I modified a non-unified chassis 5 years or so ago. I wanted to
disable the tone during cw id, so I used a small reed relay and broke the pl
audio right at the input on the exciter board. I believe all I did was to put
one end of the relay to 12 volts and the other end to a diode or gate. I don't
quite remember how it went all together. I'll see if I can find the
documentation and let you know.
HTH
Sean ve3hxp
--- In [email protected], N1BUG <p...@...> wrote:
>
> I'm guessing I am not the first to want to do this...
>
> I want to use a UHF Micor for a link. I want to be able to stop the
> PL encode immediately when a user unkeys, but I want the controller
> to be able to hold the transmitter up (without PL tone) for sending IDs.
>
> There appears to be no PL on/off gate on the TLN5731A encoder. The
> only tone gate is Q703 which only gates the out of phase tone used
> for reverse burst.
>
> Other than using a mechanical relay to interrupt the encoder tone
> output, any suggestions?
>
> Thanks,
>
> Paul N1BUG
>
