Hi Mike!

Indeed!  It just struck me that these transmissions seemed to 1) not be on a
normal CW frequency, 2) be like "numbers stations", 3) seemingly emanate
from the Middle East and 4) be close in time to what happened in Paris on
Friday night.  I wonder if my "1" is correct and how close in time these odd
transmissions began to when the attacks in Paris happened?  Wouldn't this be
a simple and easy way for terrorists to coordinate bad acts?

73,
Richard KK6MRH

-----Original Message-----
From: For blind ham radio operators [mailto:[log in to unmask]]
On Behalf Of Mike Duke, K5XU
Sent: Saturday, November 14, 2015 8:38 AM
To: [log in to unmask]
Subject: Re: Code groups

Richard,

Code groups are random groups of letters, numbers, or a combinations of
both. Each group usually, but not always, contains five characters.

The set of records that I learned CW from in 1968 used code groups, rather
than words, for their lessons. Initially, at least, that made it hard to
second guess which letter was coming next. Even now, copying random code
groups will separate the men from the boys, especially at higher speeds.

The intruder that I mentioned was transmitting CW, but there have been
similar stations that transmitted using either SSB or AM. Most of the voice
transmissions were number groups, but I have encountered a few letter group
voice transmitions as well.

If you are interested in these transmissions, take a look at
www.numbers-stations.com.

--
Mike Duke, K5XU