[RFI] 40 Meter OTH Radar?
dave at nk7z.net
Sun Dec 13 23:59:21 EST 2015
If you are really interested in this, join the group below, in my sig,
Dopplergrams. Peter Martinez, (creator of PSK31), is on the group, and
is a bottomless pit of information on this... He is listening to all of
these radars, and knows exactly how they work.
He uses that group to release his SBSpectrum software. There is always
a really interesting discussion going on about just this sort of
question there... Join, introduce yourself, and ask if anyone knows
what such and such is, he or someone will have the answer in short
Thanks and 73's,
For equipment, and software setups and reviews see:
For MixW support see;
For Dopplergram information see:
For MM-SSTV see:
On Sun, 2015-12-13 at 20:32 -0800, KD7JYK DM09 wrote:
> On a whim I spun the dial and I hear several OTHR signals from about
> 6900-7000 at 0420Z. I'm also hearing what sounds like a cricket chirp on
> 6870 and 6880 and a couple other places around there. There is also
> continuous STANAG on 6910, with another "cricket" on 6920 and more STANAG on
> 6980 which is usually confused with OTHR and can run up to hours as a time.
> A radio issue prevents me from tuning in better than 10 KHz increments, so
> the readings aren't exact, but good enough for what I'm describing.
> Can someone listen to these "crickets" and tell me what you think. I've
> never heard this before. Oddly, it sounds nearly identical to a wireless
> keyboard on 27.145 MHz, but I can assure you, there is no such device
> anywhere near where I am at this time.
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