Re: how to tune a medium sized coil

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

Original poster: "Barton B. Anderson by way of Terry Fritz <twftesla-at-qwest-dot-net>" <tesla123-at-pacbell-dot-net>

Hi Shaun,

If you have the generator and scope, I'd suggest hooking up the resonator
(sec and top
load) and find the frequency. Then calc the primary tap position to the
measured frequency
and start there. You will most likely need to fine tune the primary tap.
During the tap
tuning process, keep an eye on the secondary for flashovers, primary to
secondary arcing,
etc... If necessary, you can raise the secondary up to rid the system of
these occurances.
I personally like to tune at 1/2 power, then fine tune at full power if
necessary.

--
Barton B. Anderson
http://www.classictesla-dot-com

Tesla list wrote:

> Original poster: "Shaun Epp by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<scepp-at-mts-dot-net>
>
> Hello you'll,
>
> I need your help again
>
> I'm nearly complete my TC running a 12Kv at 60mA tranny.  I have a variac
> too and I was wonder if it would be safe to tune with power through the
> variac (run low at first), or
> do I need pre-tune first with a oscilloscope and signal generator?
>
> I've read that I need to check the secondary with top load frequency and
> then the primary tank cct and tune it to match.  I guess adjusting coupling
> would be easier with test equipment but this all sound like a tedious
> process.
>
> What experiences have the readers had on this, Any input guys??
>
> Shaun Epp,   slowly building a tesla coil.