www.lazygranch.com/sound/shortwave/136khz.wav
Recorded in the SF bay area. I got the demo of skysweeper to decode it
as FSK, though not terribly interesting data.

Any idea of the source of this signal?

wrote in message
oups.com...
www.lazygranch.com/sound/shortwave/136khz.wav
Recorded in the SF bay area. I got the demo of skysweeper to decode it
as FSK, though not terribly interesting data.

Any idea of the source of this signal?

"Lowfer" radio hobbyists

In article ,
Casper Milquetoast wrote:

wrote in message
roups.com...
www.lazygranch.com/sound/shortwave/136khz.wav
Recorded in the SF bay area. I got the demo of skysweeper to decode it
as FSK, though not terribly interesting data.

Any idea of the source of this signal?

"Lowfer" radio hobbyists

The US Lowfer band is 160-190 kHz. 47CFR15.217

Mark Zenier
Googleproofaddress(account:mzenier provider:eskimo domain:com)

wrote in message
oups.com...
www.lazygranch.com/sound/shortwave/136khz.wav
Recorded in the SF bay area. I got the demo of skysweeper to decode it
as FSK, though not terribly interesting data.

Any idea of the source of this signal?


Interesting. Narrow shift (50 Hz?).
50 Baud. Minimum shift keying apparently.
Similar to DGPS but different.

I can receive it in San Diego but it is
pretty weak.

This fellow has an experimental license:
http://www.arrl.org/news/stories/2003/08/07/2/?nc=1
But he is sending CW, not FSK.

(US hams don't have an allocation the
http://www.eham.net/articles/6372?eh...2e34c1bc3ec1a3 )

--
rb

FWIW, the signal is no longer modulated at 1Am PST. The carrier is at
135.95 when I use the sync mode to lock onto it. The signal is just as
strong, simply not modulated.

wrote:
www.lazygranch.com/sound/shortwave/136khz.wav
Recorded in the SF bay area. I got the demo of skysweeper to decode it
as FSK, though not terribly interesting data.

Any idea of the source of this signal?

wrote:
FWIW, the signal is no longer modulated at 1Am PST. The carrier is at
135.95 when I use the sync mode to lock onto it. The signal is just as
strong, simply not modulated.

Now that you put it that way, a quick Google identifies it as station
NPG in Dixon, CA.

--
If John McCain gets the 2008 Republican Presidential nomination,
my vote for President will be a write-in for Jiang Zemin.

I've always wanted to look at that Dixon antenna farm, so maybe I'll DF
this signal.

Googling NPG, I found the program a reference to the Argo program to
demod the signal. Still no modulation on that 135.95 signal, but Argo
works for NDBs too. This is the WL (Canada) beacon
http://www.lazygranch.com/images/beacons/wl.jpg
Distance about 1000 miles.

clifto wrote:
wrote:
FWIW, the signal is no longer modulated at 1Am PST. The carrier is at
135.95 when I use the sync mode to lock onto it. The signal is just as
strong, simply not modulated.

Now that you put it that way, a quick Google identifies it as station
NPG in Dixon, CA.

--
If John McCain gets the 2008 Republican Presidential nomination,
my vote for President will be a write-in for Jiang Zemin.