Jim Kelley, AC6XG wrote:
"I think Farqaday stilll provides the best explanation."

Yes. Faraday showed d-c had nothing to do with wireless. It was the a-c
motivating wireless electrical coupling.

An Englishman, Faraday, constructed a transformer in 1831. He used two
isolateed coils of wire wound on the same spool. He connected a
galvanometer across one coil. He noticed a brief deflection of the
galvanometer each time he connected or disconnected a battery to the
second coil.

Joseph Henry, a professor at Albany Academy in New York was
independently making the same observations at the same time as Faraday.
When Henry got news of Faraday`s discoveries, he made no effort to claim
credit for his own work but often referred to Faraday`s discovery.

It was the change in the magnetic field which induced electricity
without a direct connection, not the value of the steady magnetic field
itself.

Same with antennas. A battery connected to an antenna sends no signal. A
varying field is required to produce a signal in an antenna.

Best regards, Richard Harrison, KB5WZI

On Wed, 28 Sep 2005 11:16:05 -0500, (Richard
Harrison) wrote:

Same with antennas. A battery connected to an antenna sends no signal. A
varying field is required to produce a signal in an antenna.

Hi Richard,

As much as the practical consequence is supported by this statement,
it is not literally true.

The battery (which requires no attachment, but neither does it suffer
one) does send a signal. It happens to be a static polar field. Any
charge within the vicinity (and arguably that is out to the edge of
the cosmos) will perceive its presence, OR its absence. Hence it
contains at least binary information. If we know the polarity of the
charge, then it contains at least quadratic information.

Within the dynamics and scope of life, there are many static charge
signals that hinge upon these 2 bits of information. Now, given I
used the terms dynamic and static in the same breath....

73's
Richard Clark, KB7QHC

Joseph Henry, a professor at Albany Academy in New York was
independently making the same observations at the same time as Faraday.
When Henry got news of Faraday`s discoveries, he made no effort to claim
credit for his own work but often referred to Faraday`s discovery.

It was the change in the magnetic field which induced electricity
without a direct connection, not the value of the steady magnetic field
itself.

Slight correction: it is the change in the magnetic flux that gives
induced EMF. You can get an induced current from a constant
magnetic field if the circuit loop moves in or out of the field,
changing the flux throught the loop.

Tor
N4OGW