Roger,
Maybe there was a kind of "utilities assisted earth mode" on the loop
at 3 km distance, as you call it? How high is the antenna and where is
is placed? I hope its on the roof of the house :-) If its near a wet
tree and just 3m long, it may be worse than the loop. How do you
measure the resonance? If you measure the antenna current, how high is
it?
I think you are on the right way to make your signal detectable in
higher distances! Good luck!
73, Stefan/DK7FC
Am 11.01.2011 19:26, schrieb Roger Lapthorn:
So much for the theory then....
The signal level at G6ALB in the next village (3km although WSPR shows
it as 0km) is some 10dB down on my loop antenna. Not sure if I
got my sums wrong or there is some unexplained loss. The RX system at
G6ALB is unchanged.
73s
Roger G3XBM
On 11 January 2011
17:32, Roger Lapthorn <[email protected]>
wrote:
Dear
All,
Today I rigged up and matched a simple, small, Marconi vertical on
136kHz instead of the vertical loop. Based on measurements of antenna
current and some reasonable assumptions of effective height, I now
believe I have around 200uW ERP on the band - heck this is high
power for me!
>From now until late this evening I will run the WSPR beacon (136kHz USB
dial) in the hope that a few more people will be able to copy the QRPp
signal. Please have a go and let me have any reports.
73s and good luck
Roger G3XBM
--
g3xbm-qrp.blogspot.com/
www.g3xbm.co.uk
www.youtube.com/user/g3xbm
G3XBM GQRP 1678 ISWL G11088
--
g3xbm-qrp.blogspot.com/
www.g3xbm.co.uk
www.youtube.com/user/g3xbm
G3XBM GQRP 1678 ISWL G11088
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