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Thanks a lot Stefan for this nice confirmation! I'm
quite amazed that it did work so well. And congratulations to you - as they say,
with QRP all the hard work is being done on the receiving side! And I
recall our conversation not long ago, when the two of us half-jokingly
calculated that we could probably work each other at one bit a day
;-)
The amazing thing is that virtually
everybody can do this. For transmitting, all you need is an average
LF backyard marconi, or a strapped 80 m dipole with reasonable insulation.
We actually live on a fairly small plot, and I have 42 m of wire up
at about 7m effective height. A power of 80 W gives around
0.28 A (ie. 21 kV antenna voltage). Thanks to Spectrum Lab,
accurate GPS or MSK stabilisation has become almost
straightforward.
I have stopped the transmitter now at 18:00, as I
do not dare to let it run through the night. If conditions allow, I will try to
add another dash tomorrow ;-)
Best regards,
Markus (DF6NM)
----- Original Message -----
Sent: Saturday, October 09, 2010 6:22
PM
Subject: Re: LF: Re: Transmitting on
8969.998 Hz
Hello Markus, VLF,
Yes,
indeed. 10 dB S/N in 47 µHz :-) Unbelivable! This indicates that your
transmitter and my receiver must be quite accurate ;-)
Markus, here we
may achieve some very important informations: The QRN will rise in some hours
but maybe your signal level will rise too! The maximum S/N may be achieved, as
a function of daytime! I am looking forward to your transmission!! Please
don't stop! :-)
This can be seen as a new record: The first
transmission/reception above 1 lambda (even above 5 lambda) on VLF that is
generated by a fixed station (means not /p) .
You could run the carrier
for days and 100 W TX power is managable. But: Transmitting "NM" means
transmitting 66 hours, without the breakes. If 1 kWh costs 0,2 Euro, you have
to pay 1,33 Euro. So you should place the coil not on your roof but directly
in the kitchen to 'save' at least the coil losses by heating your home!
;-)
73, Stefan/DK7FC
Maybe Paul Nicholson can receive your
signal too. I would wonder if not! ;-)
Am 09.10.2010 16:14,
schrieb Markus Vester:
There seems to be a peak on DK7FC's
grabber...
----- Original Message -----
Sent:
Saturday, October 09, 2010 1:21 PM
Subject:
LF: Transmitting on 8969.998 Hz
Frequency changed to 8969.998 at 9:50, to be within
Stefan's 47 uHz window.
----- Original Message -----
From:
Markus Vester
To: [email protected]
Sent: Saturday,
October 09, 2010 11:41 AM
Subject: VLF: Transmitting on
8969.98
Since about 9:30, I am radiating a carrier on 8969.98 Hz
(GPS controlled) from my home antenna, EMRP approx. 5 uW. I hope to be
able to keep it up for a few hours, despite the presence of minor
partial discharges somewhere around the house, as indicated by the noise
visible on the LF grabber.
Best 73,
Markus (DF6NM in
JN59NK)
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