Jeff,
I'm not sure why they used A2 emission, but it may be a throwback to spark
days. In the early days of tube radio, both hams and commercial stations
would mechanically chop the CW to make it tone modulated. The advantage of
A2 is like AM vs SSB, you can copy it on a diode detector, and the frequency
is not critical as it is with A-1.
Perhaps many of the Liberty Ships weren't equipped with then-modern
receivers with BFO's and the required stability.
That's a good question.
Enjoyed the QSO. I didn't know at first that it was a blown fuse. Just
thought band condx had changed.
73, Don
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