Sent: Saturday, August 22, 2015 5:07 PM
Subject: Re: LF: Re: Band is open to VK!
Hi Fausto, LF,
>> do not
forget that in 1901 Guglielmo Marconi received a signal across the Atlantic at a
frequency around 500 kHz
...did he really? I think there
is some doubt around this story. With a coherer, it would be very hard
to prove the difference between receiving a signal consisting of just
three dots, and false triggering by random statics. Considering a situation
where a success was badly needed, the reception may well have
been the result of wishful thinking.
Today
we'd simply say "show us the screenshot" ;-)
Best 73,
Markus
Sent: Friday, August 21, 2015 9:59 PM
Subject: Re: LF: Re: Band is open to VK!
:-)) I have a 8 motor drone but can fly
only 20 minutes with one Kg payload.
A kite or baloon is better.
Seriously
speaking, the difficulties are very big,
as rightly says Stefan 160 meters
band, has a very different behavior but, do not forget that
in 1901 Guglielmo Marconi received a signal across the Atlantic at a frequency around 500 kHz and with a receiver that in comparison with
those of today was a tack. Ok were "only" 3500 Km.
Today what are we doing more
with our ultramodern equipment?
Today we have SDR, filters, DSP,
noise reducer, Marconi at Signal
Hill had a drop of
mercury.
Today obtain
a considerable power is
relatively easy and inexpensive,
114 years ago there were only Ruhmkorff coils then, how much power was actually radiated
no one ever taken the trouble
to measure it.
But as they did then my compatriot to get those great results: trying, trying and trying again
trying to improve
something every day.
The important thing is to think that nothing is
impossible, maybe improbable but not impossible.
Tonight I
bored with the history of telegraphy...:-)
73, Fausto IK4NMF
...
