Batboard

Hi,

I am using GM338, for communication my sea going vessel. My Tower is 50 meter high, and distance between tower and base station is around 100 meter. I have used Andrew LDF4-50A as the feeder cable. Now i can communiacte in channel 69 only, but in channel 74 i can receive only but i can not transmit.

Anyone please help.

Regards
Rawhid

Double check your radio programming, Ch 74 is simplex Port Operations.

Please try check frequency and tone code.