To All from PA0SE
The following is part of an e-mail I received from Murray,
ZL1BPU.
73, Dick, PA0SE
I have just about completed the
design of an LF Exciter using a
microcontroller. It is very simple (all the compexity is in the micro),
and
yet it offers very high performance on the LF bands. The synthesizer
uses
software DDS and a step size of 84 mHz (1/3 the JASON step). It
operates
ASK, FSK, DFCW, FELDHELL and MT-HELL, and I am at present testing it
with
JASON. It has a built-in beacon which also operates all these modes and
has
a 120 character message. The output is about 1W from 10 kHz to 250 kHz,
and
it operates from 0 to 400 kHz.
73,
Murray ZL1BPU
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