Total posts : 45366
as 15.239 and 15.219 is concerned.
Nor is there on longwave from 160 kHz to
Ask the many experimenters that are running
in the longwave and mediumwave allocations
with digital modes or morse code (unmodulated
carrier on and off.)
A friend of mine ran longwave and mediumwave
beacons in the 1980s with cw. Now, granted, he
used the ground systems of a broadcast station.
OK, so usually Part 15 experimenters would not
have access to such a thing.
Still, the results are impressive. A 100mW
Part 15 beacon on 1625 kHz was heard in Connecticut (of course) and also
MA, NY, and NH.
His 1 watt longwave beacon on 189.0 kHz was heard in
5 states, the farthest away was North Carolina. That’s
at least several hundred miles, probably more – I’d have
to get out the map. There was enough antenna current
on the longwave beacon to light 9 neon bulbs in series.
(Does this make sense? Current?)
Granted again, there was a BC ground system and
both beacons had big tophats. The antenna length
for the longwave was 50 feet. The length for the
MW beacon was 10 feet. (This was before the slight
rule change regarding length.)
Anyhow – there are still quite a few of these experimenters
on today using digital modes.
And they are going hundreds, and sometimes, as much
as 1000 miles.
Once the antenna length and input power are determined,
you can’t just STOP the radio wave. It may be very very
weak – but it will keep going.
Brooce, WLP and whatever else I have running around