Monday, March 02, 2009

The Great WebSDR Tour - Part 4 (40m)

We conclude The Great WebSDR Tour with some stuff found on 40 meters.

7033.3 (listed 7037.9)
I probably should have switched to LSB before getting a frequency on this one. It's TA2BBS-4, node #4 of a packet/Pactor mailbox and bulletin board system. The transmitter is in Ankara, Turkey.

7034.0 (see above, listed freq is much higher)
This is also packet, but I couldn't get an ID

This is the infamous 40 meter SLHFB cluster that European hams have been serenaded by for decades now. Like 80m and the others, it's a cluster of propagation beacons (?) used by the Russian Navy. They bang away in CW, with single-letter IDs spaced 100 Hz that are consistent from cluster to cluster. That's why you'll remember some of these from 80.

Here's what I have so far:

7038.7 "D" Sevastopol 01/30/09 0650
7038.8 "P" Kaliningrad 01/30/09 0659
7038.9 "S" Severomorsk 01/30/09 0650
7039.0 "C" Moscow 01/30/09 0650
7039.1 "A" Astrakhan? 02/03/09 2050

(Again, thanks to Ary Boender.)

Quite the racket when these are all coming in at once, with different letters fading up and down at different rates.

Indicated center frequency of what sounds like a loud teleprinting idler. May be an image, I don't know. It's REALLY loud, and it appears (much weaker) the same distance from the other side of the IQ mixer center frequency. Appears to be 75/200 and sounds like some military and diplo stuff but I have no way of knowing if I'm right. Fades in and out with the night time skip. ?????????????

Happy SDR'ing!