Re: Alterations worth doing?

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: Ed Phillips <evp-at-pacbell-dot-net> 

Tom,

You can always add an "off-axis" auxiliary coil in series with your
primary.
Contrary to intuition, adding additional inductance not coupled to the
secondary does not significantly reduce the overall "efficiency" of your
coil.

--Steve Y"

	Correct, but adding additional inductance requires closer spacing of
the secondary and the "real primary".  I've used a roller coil out of an
old transmitter, with a pulley on the shaft and nylon cord for remote
control.  The "fine tuning"  showed up only for low power inputs where
streamer formation was pretty sparse.  As the power goes up and the
streamers form tighter coupling is needed and the resonant frequency
lowered.

Ed