Hello Marcin,
Very interesting! For MF it strongly helps to rise the antenna wire a
few meters above the ground. I once built a full size dipole for 630m
which was just 4m above the ground. It worked well, even with low power
in CW! It helps to run a WSPR beacon for 24 hours or so, then you get a
good impression. Before going to VLF with a 2000m wire, don't forget LF!
It will be interesting to see what you can reach there. And there are
always active grabbers and WSPR monitors watching for you!
Good luck on VLF then!
BTW i will be back on VLF soon, maybe very soon! Trying a new frequency
below 5 kHz and above 3 kHz! :-)
73, Stefan
Am 25.07.2017 05:46, schrieb [email protected]:
I would like to experiment with short earth dipole (150m). First
transmission test at 472kHz to watch under the link:
https://klubnl.pl/wpr/en/index.php/2017/06/22/proby-z-antena-dipol-ziemny/#more-394
It is possible to build a longer earth dipole: 600m and 2km. I think
2km of earth dipole will be tested for VLF. I already have GPSDO with
1PPS signal. I stopped on the SpectrumLab configuration.
73! Marcin SQ2BXI
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