Re: ferrite mini coil

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

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

I like this idea..Thanks John..    
Mike 



>
> I would not expect the ferrite core to help much when placed in the 
> secondary winding but in the Tesla Coil Construction Guide I show a tuning 
> coil that uses a ferrite core. Using a small TC that was carefully tuned I 
> could turn the sparks on and off by merely moving the core in the tuning 
> coil only a fraction of an inch. It was obvious that the ferrite core could 
> easily vary the full tuning range of the primary coil. 
>
> John Couture