Hi Jay,
Interesting, thanks for the info!! Yes and that could be a real
alternative for those with a small garden and a stressing XYL. The wire
for the dipole can be quite small and fits into a backpack.
Then its a question of the dependency of the antenna efficiency as a
function of the ground conductivity. This will be one of the
interesting results!
10m above ground is not much for a 630m band dipole but if the
difference to 2m above the ground is just a few dB, one can easily
through out the wire during taking a walk and can do some MF /p
operation, without a kite, without the need for a free field, without a
tower, without a good earth (connection)... Many advantages! Maybe...
BTW i have also modified (extended) the range of my MFJ 259B HF antenna
analyzer to cover MF (313...658 kHz) and LF (103...209 kHz). This
modification is done very easy! I'm not sure how accurate the
measurements are in that range but maybe it gives me some ideas "where
i am".
Looking forward to that test!
73, Stefan/DK7FC
Stefan
This may be of interest for your
next exploit ...
Looking back in my 500 kHz log, I
see that on 1/3/2010 I had a CW QSO with WD2XSH/35 in South Dakota
... who was running a full size 600 meter dipole. As I recall his
antenna was relatively low at 30 or 40' above ground and he was running
only 50 or 100 watts. His signal was weak but solid copy over the few
nights that he was active. Distance was 1210 mi / 1950kM. Believe his
antenna was 'out in the open' as he apparently owns a good sized farm.
Jay W1VD WD2XNS WE2XGR/2
----- Original Message -----
Sent: Wednesday, July 18, 2012 3:50 PM
Subject: Re: LF: increase in Opera 136 WANTED 136 QRO
test stations !
Hi Graham,
Well, as often announced i want to do some tests with a full size
dipole for 630m. Maybe the signals will be very weak. QRSS is not usual
on MF and so Opera or WSPR will be useful for the tests. However i
would have no internet access during the tests...
BTW which information is contained in one OP message? Just the callsign
or the callsign+locator?
73, Stefan
Thanks Stefan
Main thing is , that all stations have the same mode
set , but if you are using the windows software , the internet
beacon will show the mode , OP8 or OP32 ... this is where the
PIC based systems have a problem. but if the tx is remote ,
its possible to simply run Op on a web linked PC to beacon via
the web ..
Monitors can run X2 Opera , one set to OP8 , the
other OP32 , with some CPU overhead , but not a problem on a
'new' pc better , just the one session.
If you have a day selected, then can post to the user
groups, to ensure the maximum number of Rx stations
73-G.
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