HFU HF Underground

Loggings => Utility => Topic started by: AlanC on July 16, 2017, 2124 UTC

Title: Air Horn and Buzzer both poorly...
Post by: AlanC on July 16, 2017, 2124 UTC
The 'Air-Horn' on 4020 is not radiating it's normal signal; there is plenty of carrier but the modulation is a weak 'prrrr-prrrr-prrrr' instead of the normal strident tone. Sounds 50Hz-ish.

Coincidentally the buzzer on 4625 is almost completely off air- it was very weak earlier and now it's almost completely gone, no carrier just a bit of sidebands. I'm struggling to believe its just bad propagation, I've never heard it that bad before and everything else seems normal.

Title: Re: Air Horn and Buzzer both poorly...
Post by: MDK2 on July 17, 2017, 1640 UTC
Interesting. Where's your QTH?
Title: Re: Air Horn and Buzzer both poorly...
Post by: sat_dxer on July 17, 2017, 2021 UTC
4625kHz heard buzzing away from 2015z 17 Jul 17 on the Twente WebSDR...
Title: Re: Air Horn and Buzzer both poorly...
Post by: AlanC on July 20, 2017, 1042 UTC
Sheffield, UK but I was listening on the Twente webSDR.