[Elecraft] OT-P3 capture of a 17M intruder

[David Honey]

On 2013-01-14 17:37, Richard Fjeld wrote:
> There is one that is about -70 dB at my Minnesota qth on 3.950-60 MHz (as I recall).  It is ten KHz wide with a second 10 KHz wide signal right above it in frequency, but about half as strong.  However, I have seen times when the second one wasn't present, or was being covered by other signals.
>
> I see it late in the evening after 10 pm cst and it lasts non-stop, with no let up, for hours.  Other people with pan-adapters have asked  about it.  It reminds me of a digital TV transmission.  It is nicely shaped and stable.
>
>
I've seen similar from OTHR (over the horizon RADAR). It usually has a 
well defined 20kHz bandwidth with a PRI of 10Hz.
DFing it usually suggests about 100 degrees from southern UK.