Hi Mike, LF,
I can't say that I have seen that signal but I will certainly look
for it.
I have a similar signal on 136.160kHz at the moment which on this
occasion started at 1701utc on 2/06/2014.
Also a little while ago the same/similar strength signal was on
136.500kHz for a few days.
I and others on the LF group suspected a mixing product with the
very strong signal at my location on 81kHz.
During the long period of time (years) I have monitored 136kHz
band I have not seen these signals before.
As far as I know nothing at my station has changed.
It was suggested the other part of the mix may be around 55kHz.
I am now monitoring the area round that frequency to see if any
Tx's stop & start at the same times.
I would be interested if anyone else has seen these signals.
See my grabber.
73, de Gary - G4WGT
MF-LF-VLF Grabber : http://myweb.tiscali.co.uk/wgtaylor/grabber2.html
Web : http://myweb.tiscali.co.uk/wgtaylor/index.html
.
On 03/06/2014 10:20, Mike Dennison wrote:
I presume this has been discussed before and I missed it.
What is the origin of the quite strong, wide RTTY-like signal on
474.0kHz? It appears to be commercial as it is on continuously, and
it comes up after dark every day.
For a while I presumed this was a funny on my receiver, but it
appeared on another receiver with different architecture, and also on
DK7FC's grabber.
Mike, G3XDV
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