Re: [IRCA] How to ID an unmodulated LW carrier?

["Steve Ratzlaff" <steveratz@xxxxxxxxxxxx>]

You are possibly hearing a DGPS station on 302 kHz; there's one on 302 
located at Point Loma, CA--don't know where that is in relation to you.
http://www.dxinfocentre.com/dgps.htm has info on frequency and locations of 
NA dgps signals. DGPS generally run around 100 watts and generally use good 
antennas, compared to the usual 25 watts and often poor antenna that NDBs 
use, so the DGPS can be a pretty strong signal depending how far you are 
from it. (Or use Google to find out what DGPS is if you don't know anything 
about it.) I'm not sure what DGPS sounds like on an AM radio, if it 
demodulates it at all; a radio with SSB or CW mode you hear the "rattle" of 
the distinctive radioteletype-type signal. There are various software 
decoders that can be fed with the audio output from a radio receiving the 
signal which show the location and other information about the DGPS signal, 
however a ULR is not a suitable radio for use with such software.
If you can solder two wires to a variable capacitor, and wind wires around a 
PVC loop frame (or other type of loop frame) you could make your own 
inexpensive tuned LF loop, and inductively couple your ULR (or other radio 
that uses a ferrite loopstick at LF) to that. There are various loop 
calculators on the internet where you can design the loop given the frame 
size and desired frequency.
73,
Steve

----- Original Message ----- 
From: "Stephen Airy" <pianoplayer88key@xxxxxxxxx>
To: "IRCA List" <irca@xxxxxxxxxxxxxxxx>
Sent: Saturday, August 20, 2011 3:35 PM
Subject: [IRCA] How to ID an unmodulated LW carrier?


Hi all...

I briefly checked some LW reception around sunrise this morning using my 
Tecsun PL-606 resting on a barbed-wire fence across the street from my 
house.

I came across an interesting signal on 302 kHz.

73 and good DX,
Stephen

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