AA4LR writes:
> If you recall several years ago, there were a number of packet
> forwarding stations operating on HF under an STA that were using a
> 600 Hz shift. 300 baud, 600 shift is a modulation index of 1.
The STA work was all done at 200 Hz shift, 300 baud ... I was a member
of that group in the mid-to late 80's. The STA was issued to ARRL and
the results were the basis for the (misguided) rules that currently
permit both automatic and semi-automatic operations.
73,
... Joe, W4TV
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