----- Original Message -----
Sent: Sunday, May 01, 2011 6:05 PM
Subject: LF: 325km with the QRPp QRSS30
beacon
"Because of the extremely low antenna
efficiencies, 136kHz is not a band for low power transmitters" - a quote from
page 67 of "LF Today", the excellent book by G3XDV and
M0BMU.
Henny PA3CPM has sent me a screen shot taken this
morning that shows my signal reaching him in Holland. Just a few dB more would
make quite a difference and make the signal fully readable. I am very grateful
to Henny (and others) for working so hard to find me.
I continue to be
amazed, and really pleased, that something this simple (2.4W RF, 50uW ERP,
QRPp beacon TX and a simple thin wire loop antenna) can be detected so far
away, although I know others have done far better. Of course, I accept
it would not be possible without the signal processing available to us on the
RX end and the skill of those like Henny winkling out the signal from the
noise.
....but maybe in the next edition of the book, the words should
be changed? :-)
73s
Roger G3XBM
--
http://g3xbm-qrp.blogspot.com/
http://www.g3xbm.co.uk
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https://sites.google.com/site/sub9khz/
