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Original poster: "davep by way of Terry Fritz <twftesla-at-qwest-dot-net>" <davep-at-quik-dot-com>
> I have 4 old AM tube radios. The stations come in fine during the day but
> just after the sun sets and just before it rises the radio stations drift
Nought to do with 'induction variation'.
Basic propagation variation as the ionosphere
settles down for the night. cf any text on propagation.
for a verification, find a synthesized am/bcb radio
(car radio may be easiest....). Fading will be the same,
allowing for the differnce in the sensitivity of the
And there is a Whole Gropup of people who monitor
ELF/VLF (RF in the audio region. They hang out
on different mail lists.)
Middle of the geomagnetic storm. BBC via SW just fine,
with no retuning on the LC tuned receiver.
Official NASA Aurora alert for tonight (Thu) & tomorrow.