Re: [TCML] Half Wave Coil

["DC Cox" <resonance@xxxxxxxxxxxx>]

On 3/15/08, Jim Mora <jmora@xxxxxxxxxxx> wrote:
>
> Hello All,
>
> I am thinking of building a halfwave resonator. The dimensions I am
> thinking
> about are 8.25" pvc .125"wall irrigation pipe 72" long former. I have a
> 14400 5KVA 240v potential transformer and a Maxwell .1uf 50kv cap (I have
> 2
> of these) and would wind with ~ 10 lbs of 22awg ~5000ft. I also have a 12"
> G10 x 8 arsg with a variable speed dc motor and controller with 1.5" .125
> W
> electrodes.
>
> There is a lot I don't know about these. Is it wound the same direction
> like
> a double long 1/4 wave the entire length? I seem to remember the primary
> is
> designed to resonate at 2x FR of the whole coil length. I would use a 12"
> wide solenoid with a foot or more of PVC overlapping on each side of
> center.
> There doesn't seem to be very many turns indicated so I suppose .5 Cu tube
> would be ok?... I can get this former in .125" wall as well, in fact I
> have
> 6 feet of it.
>
> I also seem to remember there is to be a gap under the primary... is this
> to
> tweak the coupling? What is the best gap for such a system? How does the
> efficiency of these compare to a regular coil? Since the arc strikes 180
> degrees out of phase and connects, one of this size and power would have a
> roaring arc, yes?
>
> I have decided to abandon the 12" 1/4 wave I was going to build in favor
> of
> a 22-24" if I can find a suitable former since I now have access to a very
> favorable steel building with tall roll up doors and a large concrete area
> to roll out into. The electricians I am working with can get me 16 AWG at
> cost in extended lengths. On these big coils is stranded PVC ok or is
> solid
> better?
>
> Thanks All,
> Jim Mora
>
>
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