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RE: Continuously variable primary

Original poster: Tim S <stm800@xxxxxxxxxxx>

. A far simpler approach would be to construct
two conventional flat primary coils, joined in the center with a short
length of flexible cable, and have a mechanism to vary the separation
between them. This will vary the mutual inductance, and consequently,
the net inductance of the two coils in series. The achievable
adjustment range is probably equivalent to a couple of turns, and that
should be sufficient for fine tuning. Rough tuning would be achieved by
tapping the upper and lower coils in the traditional sense, with power

Regards, Gary Lau

hi gary ,
i like this idea you presented.i find it intriguing.

would it be possible for you to draw a little sketch?

you could email me off list.

thanks  tim