|
John,
in the "above-ground" category, it
may be fair to have separate leagues for airborne antennas (kites,
balloons), and backyard-sized Marconi antennas. Stefan may
disagree here ;-))
Of the latter type, I could contribute Paul's Nicholson's narrowband
detections of my 5 uW EMRP transmissions in October at 1027 km:
On a smaller scale, there was a unique VLF two-way
contact with DJ2LF across 20 km on June 4th, using the
same equipment.
Best 73,
Markus (DF6NM)
Am 15.12.2010 12:04, schrieb Stefan
Schäfer:
Hi John,
Am 15.12.2010 11:55, schrieb John
Rabson:
I am writing a piece on VLF for the Cave Radio &
Electronics Group Journal and would like to include distance records.
Can people please confirm that the following information is correct
(or not)?
Above-ground
antennas
|
Hz |
ERP mW |
From |
To |
km |
|
8970 |
58 |
Darmstadt |
Israel/Haifa |
2873 |
|
6470 |
9 |
Darmstadt |
Poland/Warshaw |
904 |
|
5170 |
5 |
Darmstadt |
Poland/Warshaw |
904 |
|
|
|
|
|
|
The QTH of SQ5BPF is
Washaw. The rest is correct.
Earth current antennas
|
Hz |
TX power W |
Electrode spacing
m |
From |
To |
km |
|
8970 |
250 |
600 |
Heidelberg |
Roschbach |
49.6 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| I did
successful tests to Roschbach just on 8970 Hz, not on 6470 and 5170. The
distance is 49.6 km (since my earth antenna QTH is different to the kite
antenna QTH).
Thanks too.
73, Stefan/DK7FC
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