[Prev][Next][Index][Thread]

Re: spiral secondary ?



Hi ...

I had the luck to be in Ames IA at the university the other day
and with a few hours to kill went to check their library. There
way back in the dusty archives I found contiguous issues of
the Electrical Review  back into the late 1800's. In a 1898
issue there was Mr. T. showing off a completely spiral coil.
The primary was a turn or two around the outside of a five
foot circular form - looked like a table top. The secondary
was wound inward almost to the center. Sparks were flying
furiously off a third coil about 2 feet wide and one foot long,
close wound, which was hooked to the center of the secondary.

The article was about making arbitrarily high voltages to transmit
power through a weakly conducting medium - the ionosphere.

LR

>
>Just a strange thought that floated through my mind the other day -
>would a flat (or angled) spiral *secondary* be practical ? I'm sure
>the change in inductance per turn would have some effect - maybe good,
>maybe bad?