Re: On the fly tuning of a TC

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

Original poster: "by way of Terry Fritz <twftesla-at-uswest-dot-net>" <FutureT-at-aol-dot-com>


Jason,

A good way to tune the primary is to build a metal roller that contacts
the primary copper tubing.  THen you make the whole primary so that
it can rotate around the center when driven by a gear motor.  As the
primary rotates to a new position, the roller will roll along the primary
copper tubing, and the tuning will change gradually.   As you can
see, the roller always contacts the tubing with this method, so there
will be no showers of sparks as the tuning changes.  The roller 
has to be build as an arm
mechanism that can move in or out as it follows the primary spiral.
The arm could be something like the arm on a record player (phonograph).

John Freau