Stefan schrieb:
> I will detailed describe now what happend on this experiment.
> ...
Thanks, that was a good field trip in the best amateur radio
tradition. Ironic how we are at the same time using the most
hi-tech, but also the simple batteries, kites, wires, big coils, etc
that Marconi would have been quite at home with. It is a nice
mixture.
What is the exciter you are using - the silver box with the LCD
display?
And when the kite is up and tied to the car, and the wind picks up,
how do you pull it down again - do you have a winch - or a knife?
Your website mentions improvements for the next run, what do you
have in mind?
> So, what is the new WR?
Sorry, only about 16km - so far!
Perhaps the authorities can issue shorter callsigns for QRSS
300 operation? Practically, send the callsign rapidly for
station ID, then slowly send one or two random code letters to
constitute a message which can be verified for record purposes.
DX receivers may cheat by looking at online spectrograms
of course! FSK should be better than simple keying.
> And what do you expect is possible at night?
Signals should go a lot further, but the rx has a torrent of
sferics to deal with. We will have to see.
I think the ERP is about the same power as a small LED,
or less? Amazing to think that is detectable 850km away.
A puzzle is the excess signal strength, further independent
rx measurements are required.
If anyone is transmitting from home (uQRP?), I can set up very
long non-coherent averaging (days?). That is something else
to try for someone. An alternative to sending messages serially
is to send data bits in parallel, multi-frequency, the whole
message received in one long averaging. Many things to try!
--
Paul Nicholson
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