My oh My something really interesting in the manual of the newest version 955 HPC with the small board. It has something called TTON & RTON. This means receive tone and transmit tone. The all new SR955HPC can both receive and transmit from 2.0 – 2.5 – 3.0 – 4.0 kHz but whether this is all mode or just AM mode I’m not sure at the moment, it needs more research.

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