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Re: Project Last Questions
Tesla List wrote:
>
> >From tesla-at-america-dot-comWed Sep 11 22:17:58 1996
> Date: Wed, 11 Sep 96 07:58 EDT
> From: Bob Schumann <tesla-at-america-dot-com>
> To: tesla-at-pupman-dot-com
> Subject: Project Last Questions
>
> Hello,
>
> I am finishing up my small coil project and
> have a few questions I hope can be answered. My small
> coil project operates using a 9kv-at-30ma power supply.
>
> Q: I found some heavy duty 4 conductor cable with a
> very heavy shielding. Using the 4 conductors as
> my switched mains (transformer and muffin fan),
> can the shield be used to carry my RF ground or
> would that be to close the the mains?
Don't tie the shield to the RF ground! Tie it to the 60 Hz AC ground.
Don't let it float...
>
> Q: I have been using thick stranded wire for all my
> connections (600V insulation), but I have some
> Belden cable (40000V insulation). The diameter of
> the first mentioned wire is greater than that of
> the Belden. Which wire is better for connections?
> For the tuning wire?
The 40,000 V wire is better for low current hookups between the HV
transformer, protection circuit, and to your sparkgap. Use heavy gauge
between your sparkgap, tank cap(s) and TC primary. If necessary, slip
the heavy gauge wire through 1/8" thick clear vinyl tubing (in the
plumbibg section of your local HW store) to provide additional
insulation.
>
> Q: My primary and secondary are on a round piece of
> plywood. Is it okay to drill holes through the
> wood for the center primary and secondary RF
> ground connetions or better just to run the wires
> under the primary form off the side of the wooden tier?
Drilling through the wood should be OK for the ground connection. The
inner primary line will have high voltage/high current - make sure you
have adequate clearance between the primary, the tap, and any other
conductive materials. Make sure you've sealed the wood base with
multiple coats of polyurethane varnish. If you DO decide to pass the
inner primary line through the wood base, insulate it where it passes
through with either vinyl of polyethylene tubing. Otherwise you may get
relatively long flashovers and splintering along the wood fibers...
>
> Thanks all in advance. I can't wait to get up and going
> because I have a friend photographer who wants to
> experiment with different shots, times, etc.
>
Good luck on getting to first light(!!) and Safe coilin' to ya!
-- Bert --
> Bob Schumann
>
> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
> % Time and knowledge are the interest %
> % and principal in the loan of life. %
> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
>
> Bob Schumann