Showing posts with label wolf. Show all posts
Showing posts with label wolf. Show all posts

11 Sept 2009

500kHz WOLF - transatlantic?

This evening, I'm going to have a go at listening out for one of the USA stations on 500kHz who will be testing with WOLF (very weak signal mode) overnight. Not sure what my chances will be but it's worth a go. WE2XGR/2 (Burlington CT, USA) will be on 508.5kHz for about 4 hours from 2230z.

UPDATE: Sadly no copy. I left the rig and software running all night but clearly my system did not have enough sensitivity.

10 Sept 2009

WOLF weak signal mode success

After a frustrating evening of not decoding a WOLF signal, I was told how to calibrate my PC's sound card. Then I retried decoding M0BMU's signal and met with immediate success:

2009-09-10 21:15:29 >WOLF10 -r 8100.257 -f 1000 -t 1 -w 0.0000
t: 24 f:-0.339 a:-1.5 dp: 85.6 ci: 7 cj:272 M0BMU IO91VR 2W -

It seems this mode is more critical than WSPR but offers the prospect of decoding even weaker signals on the LF bands. The calibration is easily done using the 198kHz Radio 2 signal and takes only a couple of seconds.