Greetings,
I recall reading of someone building a coil with a second tank circuit, that is a second primary with resonant cap.. Supposedly, it improved the Q of the overall circuit, however, it reduced the output of the secondary significantly. As I would suspect.
All the best,
Mike
On Nov 4, 2014, at 7:17 PM, dave pierson <dave_p@xxxxxxxxxxx> wrote:
>
> ...
>>> I don't know of anyone building a stack as you described.
>>> Unless you want to see a lot of FCC trucks in your neighborhood, I
>>> don't think you want your coil to be a good RF radiator.
>
> ...
>>>> Has there ever been a coil built with 3 primary coils ie a large one on
>>>> bottom not connected to anything the normal in middle in circuit and a
>>>> smaller one on top. Like a vertical yagi with driver element
>>>> reflector? If there's any hams in this group they will know I mean I
>>>> hope.
>
> I've never heard of such, which means little.
> My understanding of Yagi principles is that
> the various elements 'need' to be separated
> by sizable fractions of a wavelength:
> 0.1 or so?
>
> This would be a bit if a challenge at typical
> Tesla Coil frequencies...
>
> best
> dwp
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