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Re: Got two more
> Original Poster: RWB355-at-aol-dot-com=20
>
> Hi All,
>
> Thanks for the multitude of answers to my last questions. Now, I got two =
> more.
> Here they are:
>
> 1.) Building poly caps: Would it be sensible (worthwhile) to add a thin l=
> ayer
> of paper (like Xerox paper only longer and wider) between each layer of p=
> oly
> and the next. The paper would really soak up oil und contribute to good
> insulation. The thickness of the paper shouldn=B4t reduce the total capac=
> itance
> too much. The additional thickness will improve flashover characteristic =
> (not
> much, tho).
>
> 2.) Do I really need to ground my secondary coil ? I haven=B4t gotten aro=
> und to
> finishing my new RF ground (4 pieces of 4 ft 35mm wide zinc coated T-iron
> rammed aprox. 3 ft apart into soft earth and interconnected with AWG 1) f=
> or my
> big tc. I=B4m runnning my small tc (3.4" secondary) the following way (fo=
> r the
> moment):
>
> There is no connection between primary and secondary (for obvious safety
> reasons).=20
> I simply run a well insulated wire from the bottom of my secondary to a s=
> trike
> rod (placed on insulated containers) and principally let the arcs fly fro=
> m the
> top of the secondary to the bottom (strike rod).
>
> Will this reduce my max spark length /any other problems, etc ?
An ungrounded secondary will run at a much higher frequency than it
should. It will likely flashover to your primary at the bottom end if
the primary is tuned to this higher frequency as there won't be a
voltage node at that end.
Malcolm
<snip>