Hi,
The difference in frequency between the two transmitters is 300
kilohertz. 300 kilohertz is exactly 1/2 of the separation of either
machine; 600 kc.
While there are methods and equipment that can be purchased to make the
two co-exist, my recommendation is to move one of them to another
frequency that isn't 600 kc away or a division of it.
Kevin Custer
Michael Singewald N1PLH wrote:
>There are two machines on the same tower on these frequencies with
>one antenna about 20 feet directly over the other. Each machine is
>putting out about 30 - 50 watts. Each machine plays fine by itself,
>but as soon as the other tranmitter comes up the problems begin.
>
>Each machine has a different PL required to key up (67 and 77). If
>someone unkeys on 146.925 while 147.225 is keyed, the 925 which
>encodes a pl seems to get into itself and the 225. The 925
>transmitter also causes the same problem on the 225 receiver.
>
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