On Sun, 17 May 2015 14:31:41 -0400, Retired wrote
in

On 5/17/15 2:10 PM, wrote:
What happened when a taxi's CB could
be heard on my powerless home stereo
speaker (ca 1975)

The speakers were not shielded enough to prevent the taxi's radio
transmissions being picked up. The speaker's "voice coil" acts similar
to a crystal radio, and rectifys the RF signal into audio.

When I had a CB base station at home in the late 70's, my neighbors
would sometimes hear me transmitting ;-)

Common problem with RF energy.

Would wrapping aluminum foil around the speaker help? Is it worth a
try?
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