Dits on 6920 1556UTC 22Mar13

[jFarley]

Noting beacon on 6920, about 20/minute, about 62mSec long, S5 signal.  Off around 1642z.

I also noted this on 20Mar13 at 2351z (also on 6920) but had to run out the door and forgot to post it.

[ChrisSmolinski]

This seems to be the return of our mysterious ditter network. I had it on over about two dozen frequencies today until it went QRT at 1724z.

I logged it here: http://www.hfunderground.com/board/index.php/topic,10533.0.html

Although perhaps the HF beacon forum is more appropriate?

[jFarley]

This seems to be the return of our mysterious ditter network. I had it on over about two dozen frequencies today until it went QRT at 1724z.

I logged it here: http://www.hfunderground.com/board/index.php/topic,10533.0.html

Although perhaps the HF beacon forum is more appropriate?

Dunno.  I was thinking about moving it over to "Other".  Tried your freq list but none of those heard here.

[ChrisSmolinski]

They seem to be gone now. I suspect the DoD contractors went home for the weekend :-)

The fact that the 4 and 5 MHz frequencies were S9 here makes me think that the location is within a few hundred miles of my QTH.

[jFarley]

I didn't realize that the single freq I heard was part of a bigger operation.  I know now to do a further search above and below next time.  Thanks!

[ChrisSmolinski]

When searching for them, I use an SDR, often in 500 kHz wide mode, to make it easy to step through HF. I'll sometimes also use a desktop radio in parallel, tuned to one of the nearby active ditter frequencies, so I can hear that transmission as well, and know about when a dit should appear on the waterfall, if there are other frequencies in use.