[GreenKeys] Questions about some signals on the air.

[Roy Morgan]

On May 25, 2012, at 5:45 PM, Richard Knoppow wrote:
...  At about
> 10.430 I find a very strong RTTY signal which seems to be
> there most of the time.

Others have reported that signal before.  It seems to be pretty  
constant.

> ...  Is it encrypted and if not how do I go about
> receiving it.

It certainly seems to be encrypted, and if that's the case, you can  
only listen and will not have any success decrypting it.  It does not  
take much encryption to keep normal folks like us from getting the  
plain information out of those signals.

> I've run into other non-ham signals that are
> similar. Please forgive my ignorance.

There are many kinds of teletype-like signals on the air nowadays.   
Many are both using relatively modern encoding/signal-processing  
methods, and are encrypted to some degree.

There is a sub-culture within the short wave listening community that  
has lots more information about many of these stations.  Here are a  
couple of links to start with:

Shortwave Utility Radio - Shortware Radio Equipment and Links
www.wunclub.com/
About shortwave utility radio broadcasts, equipment, and other related  
information.

Stephen George's Shortwave Page
www.amherst.edu/~sageorge/swl.html
Some shortwave listening (SWL)-related sites on the web: Bob Colyard's  
shortwave page, with logs, links, and access to Worldwide Utility  
Network pages.


Here's a link that seems to have info on that particular signal:

10 - 15 MHz
www.shortwavewatch.com/10-15.htm
Shortwavewatch ..... nat police ("dgsn") biskra, alg mil-std 188-141a/ 
usb 1622 14/02/11 10.430,00 datafax algerian police (dgsn), alg mil- 
std 188-141a/usb 1200 ...

The home page for that one is:
http://www.shortwavewatch.com/index.htm

Roy


Roy Morgan
k1lky at earthlink.net
K1LKY Since 1958 - Keep 'em Glowing!