Ron Baker, Pluralitas! wrote:

"Ron Baker, Pluralitas!" wrote in message
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"msg" wrote in message
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Seeking opinions on an old, commonly heard signal (AM) on HF, of some
considerable power, with a very memorable sound.

This will be a bit difficult to describe and I wonder if some folks


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Also found a signal at 8488 kHz that I think is
a mil-std-188-110 signal. Switch to AM mode. That
sounded more like what I remember from the
60's.

But mil-std-188-110 didn't exist in the 60's. Maybe there
were similar signals at that time.


I have recently located a friend from those days and the same town
who may also shed some light on this question. Also I do remember
lots of interference from medical equipment at the local hospital,
especially diathermy machines, which may possibly be the source
since the signals were _very_ strong, broadband, and at many
frequencies.

Regards,

Michael