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Markus
It is definitely CFH, and is quite loud here at 700
km. I have been watching the line on your screen as well! Unfortunately, I'm not
set up presently to make an accurate field strength reading.
John Andrews, W1TAG
----- Original Message -----
Sent: Sunday, November 21, 2004
00:33
Subject: LF: CFH on 136.9559 kHz ?
Dear LF group,
for some time there has
been a blue line on 136955.90 Hz, in the middle of my SpecLab screen (http://members.aol.com/df6nm/Grabber.htm,
now updating every 10 min). It is probably the CFH carrier mentioned by G3NYK
and monitored by CT1DRP.
This is what I had always wished to have for
W-E propagation monitoring - a narrow line that can be received with
millihertz resolution, and (hopefully) clean and weak enough not to clutter up
the band in America. The line was visible in Nuernberg during most of the
daylight hours, and peaked to ~3 µV/m around 21:15 this evening - looks like
conditions may to be improving. If somebody could make a measurement of CFH
within ground wave range, we could estimate their radiated power and make
guesses on ionospheric path attenuation.
Best wishes
Markus,
DF6NM
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