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Summertime VLF:

To: <[email protected]>
Subject: Summertime VLF:
From: "Markus Vester" <[email protected]>
Date: Sat, 4 Jun 2011 11:17:13 +0200
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Dreamers,
 
VLF may be difficult these times, but certainly not dead!
 
During the traditional fieldday near Bamberg, we raised a kite at 
during two afternoons. Due to the less than optimal wind the kite hovered mostly at a low angle, with estimated peak hight 50 to 70 m and a lot of sag. With only a few short ground pegs, we had  0.3 to 0.45 amps, and probably radiated around 0.2 mW (EMRP) on average. The carrier was DHO-locked on 8970.00, on air at 2011-06-02 13:15 - 14 UT and 2011-06-03 13:40 - 14:15 UT.
 
On my own grabber in Nuernberg (50 km from the site),
the two short dashes are brightly visible, with about 17dB SNR in 0.48 mHz. Unfortunately we did hit the maximum daily QRN period, during the morning the noise would have been about 12 dB less.
 
At DK7FC in Heidelberg (170 km) we hardly overcame the QRN, but there is indeed a hint of yesterdays dash on the 6000 window 
 
To my surprise, both transmissions were clearly picked up by Paul Nicholson's "miracle loops" at 980 km, and can be seen on
when the virtual beam rotator (compass) is dragged to about to 120 degrees.
 
 
Good luck to Chris for today's experiment!
 
Best wishes,
Markus (DF6NM)
 
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