[FedCom] 173.9875 NFM

[gary]

I found a website on PEWS, and the frequencies don't match. I have the 
manual for the EMIDS used by Groom Lake, but the pulse width of this 
signal is much longer than the 20ms used by EMIDS.
http://www.prc68.com/I/PEWS.shtml
(warning, this is a commercial website)

BTW, I have one of those plant antennas is allegedly used by PEWS. The 
trouble is many military systems used plant antennas, so it is hard to 
say if the information on the net about PEWS is correct. I've seen the 
PEWS hardware sold at electronics fleamarkets, and they did not have 
plant antennas as part of the system.


toscano2 at ix.netcom.com wrote:
> Perhaps it is some kind of sensor, sending the signal to maintain contact with the receiving device. I am thinking along the lines of PEWS, although PEWS is on +/- 141MHz.
> 
> -----Original Message-----
>> From: gary <lists at lazygranch.com>
>> Sent: Sep 5, 2008 3:14 AM
>> To: Discussion of Federal Government Communications <fedcom at mailman.qth.net>
>> Subject: [FedCom] 173.9875 NFM
>>
>> http://www.lazygranch.com/sound/173p9875.wav
>>
>> This is some digital sound that appears around the Nellis range (Central 
>> Nevada). It is not as frequent as heard on this wav file. Rather, these 
>> are chirps that I recorded from a discriminator tap. I used the tap and 
>> save the file in wave format in the event someone wants to do some 
>> analysis on the signal.
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