UNID wide band signal 43 meters 1958 UTC 9 Aug 2013

[ChrisSmolinski]

I've noticed this wide band signal, not seen before here, starting at 1958 UTC today:



On and off, and there is some apparent fading of some of the frequencies. I do not think it is local QRM.

Here it is with a wider waterfall:


Ragnar came up with "picket fence" - I like that name.

[skeezix]

That kind of neat to see the various fading holes. Would like to see this go much wider and last for a very long period of time to see how propagation affects the signal.

[Token]

Chris, do you still have a file on this signal?  If you do you might make a 20 or 30 second sound clip in USB, say 4 or 5 kHz width and around 6995 kHz c/f.  I really just want to know if this is LFM or if it is pulsed, and the tone spacing.

I have seen a similar freq and width sounder in use, mostly detectable on the west coast, but it looks like the sweep rate of this signal is much higher than the sounder I have seen.  If swept vs pulsed the sounder would be a possible fit.  If pulsed a signal I have a couple other signals as possible fits.

But really nothing in my log is a good match, they all have to be changed or twisted to fit what seems to be shown in that waterfall.

T!