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As far as being more that 100Hz off center.

Many 10 meter radios only have 5 digit counter.  Even with the six digit, its right at the resolution of the display.  You could also blame open clarifiers.

AM-only CB radios dont need a stable frequency reference like SSB does.

But i think alot of SSB 10 meter radios use the same sloppy freq reference that the AM-only radios do.  Sloppy means drifting with temperature.


To bad we cant make 28.085 an AM calling frequency.

It would give the truckers who like to run CH19-F a run for their money.