wrote:


http://www.lazygranch.com/sound/shortwave/2750khz.ogg
SF Bay area approx 9GMT 3/22/2008
2750Khz AM 9.5kHz filter

Hmm, your original post never arrived at Supernews.

Interesting; sounds like some sort of channel
calibration/equalization/training. What were your
receiver settings (mode, filter widths, processing)?

When I first began listening, my impression was of
out-of-band interference from a paging transmitter
or trunking public service repeater slowed _way_ down.

Michael