Re: Variable Coil Tuning


Does the bottom terminal have to be a toroid? What about
a metal plate that extends a couple of inches past the
edge of the secondary?...


> I ran some numbers today on how varying the distance between two top
> terminals would affect secondary tuning.  By varying the distance 12
> I got a frequency tuning range of 11.5% !!  I am now thinking that having
> dual terminals and having some motor deal that will vary the distance
> remotely is a very good way to accomplish the remote tuning function