[600MRG] Mystery signal in Colorado

[Frederick Raab]

September 29, 2017

Gentlemen:

     W0RW in Colorado Springs reports a strange signal.
It is centered on 458 kHz and has 50-us pulses at
intervals of about 8.2 ms.  It is creating noise
across the 630-meter band

     It will help in finding the intruder if we know
who else can hear.  If you can hear it during the
daytime, then you are probably receiving it by
groundwave and are probably within 100 mi.  So
your reports will be appreciated.

     Thank you.


73, Fritz, W1FR,
Coordinator, ARRL 500-kHz Experiment

Frederick H. (Fritz) Raab, Ph.D.
GREEN MOUNTAIN RADIO RESEARCH COMPANY
1183 Jonquil Lane
Boone, Iowa 50036  USA
Tel.  +1 (515) 275-2141
Cell:  (802) 598-9527
E-mail:  f.raab at ieee.org
Alt:  fraab at gmrr.biz
Web:  www.gmrr.biz