Stop the tape! Stop the tape! [Rush Limbaugh show]
A whole bunch of clues here. Paul sez a group of Cuban stations were
being received with "wildly varying" signal levels. All Radio Reloj.
So why would we see jumping signal levels on only stations of a
particular network and not others on other networks. It looks very much
like some disturbance is being conveyed by the Reloj network 's
interconnect means. Believe that was decided to be telephone circuits.
Tends to rule out power-line instabilities
Theory: extreme noise of a very few cycles can easily propagate through
phone circuits. Can they get through audio circuitry of a transmitter
and modulate the RF?
In some cases of very wide-band audio circuitry, yes they can. Brute
force can make its way into some other audio chains.
Want to send this off so am ending this here before usual grammar checks
and spelling checks.
Charles
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Charles A & Leonor L Taylor
Greenville, North Carolina