My Acom amp also will not drop the RF relay if RF is present.
73, Larry W0QE
Jim Brown wrote:
> On Thu, 11 Dec 2008 18:25:10 -0600, Phil & Debbie Salas wrote:
>> I've found that there are several transceivers that disable the amplifier
>> well before the RF output has decayed to zero, which causes hot-switching of
>> the transceiver output.
> The TenTec Titan 425 has circuitry that senses RF input and won't let T/R
> relay drop until RF input has gone away. This prevents hot switching of the
> T/R relay in the power amp in this situation. This works entirely within the
> Titan, and is independent of how the amp is keyed. That is, you can try to
> switch the Titan out of transmit with the front panel Standby/Transmit
> switch, and it will keep on transmitting as long as there's RF drive.
> I suspect that other Ten Tec amps do the same.
> Jim K9YC
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