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Re: [TCML] quasi Yagi Re: Couple questions on coiling



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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