----- Original Message -----
Sent: Thursday, January 03, 2008 9:43
PM
Subject: LF: GM4ISM 500KHz Grabber
Gents,
Thanks to Wolfgang DL4YHF, the grabber at my QTH
is now running a new beta version of Spectrum lab, that should stop the
problem of multiple users getting partial images.
After an initial rush of activity, the number of
users has calmed down, rather as expected.
Feel free to jump on board and try to break it
again!
The system is connected to my main antenna but
this is at minimum height and not correctly matched. Still it works pretty
well and many signals were visible last night.
I have also got the magnetic antenna working,
(placed temporarily on the shed roof) and it will be re-mounted when the
weather permits, it seems slightly better than the reduced height main
antenna.
I dont have the fantastically low noise floor
that John GM4SLV offers, but I hope to leave the grabber running for the
duration of the UK experiment or longer, if it is considerd useful. It is far
enough away from other grabbers to perhaps be of some use for the experiment.
It is also a testing ground for possible similar systems at SHF giving
'inverse' beacons for propagation indication.
any comments or problems encounterd, please let
me know!
Regards
Mark GM4ISM
follow the MF / LF link, at the bottom of the
page is the grabber link.
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