David Kearns wrote:
I would find the idea of a small RTTY rig an excellent
idea. Obviously PSK is a no go because its an audio
signal from a computer hence needing SSB.
Actually, the only requirement is that the RF amplifier be biased to be
linear. PSK31 can easily be generated at RF by applying a shaped
baseband signal to a balanced modulator which is then used to get the
required phase reversals.
It is normally done using SSB audio, but this is not a requirement. A
KX1 would need more than a firmware change to do this, however.
In fact, at these power levels, the balanced modulator could conceivably
be *between* the RF output and the antenna tuner! Doubt that this is
practical, though...
Lyle KK7P
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