Neither morse (loosely called CW), nor JT65, are pure sine waves, so
they will have IMD, although it may well be less than the key clicks (as
conventionally understood for morse, and because of the abrupt frequency
changes in JT65). True CW cannot convey any more information than its
existence.
Measured in a 1Hz bandwidth, the JT65 IMD would be very low, and
measured in the total bandwidth, it would be concentrated, in time,
around signalling unit boundaries. Similarly for the "clicks".
As to the mobile powers, I would have thought that it would be unsafe to
operate at some of the power levels mentioned, both in terms of the risk
to other people (e.g. someone in an open, or soft, top vehicle, or even
pedestrians in slow moving traffic), and the risk of causing an accident
as as result of EMC failures in passing vehicles.
--
David Woolley
Owner K2 06123
On 14/12/14 09:10, Edward R Cole wrote:
You are correct that the specs are for pulse and one can run CW/JT65 at
this level since there is no IMD produced by a single sine wave. So
combining two running 750w each gets you 1500w in linear operation with
2400w dissipation.
1500w mobile!!! Are you serious? I'd guess 200-250w would be adequate
for mobile. But I do not do serious HF'ing.
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