In response to some of the questions:
References:
Longwave web page http://members.aol.com/lwcanews/index.html
ve2iq web page http://w3.ietc.ca/home/bill/bbs.htm
The present amateur BPSK orgin was Coherent CW. The orginial petit filter
was not an easy construction project. However, the DSP board (without a
DSP chip - just logic chips) from January 92 QST is an easy project and
only cost about $20 for the parts. I think the kit was or is around $65
(check with ve2iq). Complete circuit is in the QST article so can
homebrew the DSP circuit.
Computer: You need something a little faster than a XT, but do not need
a 486 or MS Windows. Program is called Coherent.zip Version 5.6
available on the Longwave page. Anyway that is the zip file you need.
Lots of backgroung stuff on both pages. Look around.
BPSK is a few db better than coherent CW. The program will allow bits of
up to 5 msec. The old CCW was 100 msec. The program allows change from
the keyboard.
de Stan AK0B
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