We seek to understand and document all radio transmissions, legal and otherwise, as part of the radio listening hobby. We do not encourage any radio operations contrary to regulations. Always consult with the appropriate authorities if you have questions concerning what is permissable in your locale.

Author Topic: Selective fading on longwave  (Read 1125 times)

Offline ChrisSmolinski

  • Administrator
  • Marconi Class DXer
  • *****
  • Posts: 30368
  • Westminster, MD USA
    • View Profile
    • Black Cat Systems
Selective fading on longwave
« on: December 10, 2016, 1300 UTC »
An interesting screenshot of 309 kHz Reedy Point, DE, a local pest, briefly undergoing selective fading, and eventually fading out for a few seconds.  This might explain how a DX station can pop up suddenly and produce a few decodes. For example Lauzon, QC on the same frequency.

Chris Smolinski
Westminster, MD
eQSLs appreciated! csmolinski@blackcatsystems.com
netSDR / AFE822x / AirSpy HF+ / KiwiSDR / 900 ft Horz skyloop / 500 ft NE beverage / 250 ft V Beam / 58 ft T2FD / 120 ft T2FD / 400 ft south beverage / 43m, 20m, 10m  dipoles / Crossed Parallel Loop / Discone in a tree

Offline Looking-Glass

  • DX Legend
  • ******
  • Posts: 1110
  • Condobolin, NSW, Australia
  • "Old fashioned DXer, no offshore computer rxing!"
    • View Profile
Re: Selective fading on longwave
« Reply #1 on: December 15, 2016, 0949 UTC »
I have experienced this with Chatham Island "CI" for 3,077kms on 322KHz, listened for nearly 40 minutes then out of the noise it came for about 15 seconds and then gone despite other New Zealand beacons coming in more or less continuous.  No two nights are ever the same on the NDB band...
Condobolin, NSW.

Grid Square:  QF37ub

Yaesu FT-1000D, Yaesu FT-2000D, ICOM IC-736 HF/50MHz, ICOM IC R75 & Tecsun S-2000 to 450 feet of wire, 27MHz 1/2 wave CB antenna converted to 21MHz & a multi band vertical of dubious reliability.


HFUnderground T-Shirt
HFUnderground Garden Flag
by MitchellTimeDesigns