jimlux wrote:
> Bill Aycock wrote:
>
>> Andy--
>> The Tesla coil is really two coils, with the primary usually wound as a flat
>> spiral as a disk at the base of the other, which is a vertical tower. I
>> think that what you are calling a "Fan" is the primary.
>> Bill-W4BSG
>>
First time I ever saw one using the "pancake coil" as part of the
transformer. All I have seen just use a larger coil form with fewer
turns for the primary. Most also used a few hundred watts into the
primary in the neighborhood of 100 KHz. I've seen a lot of them using
811s but no few using a pair of 4-400s.
>>
>
> Bill is right. That's a flat spiral or inverted cone primary, and the 4
> "blades" are the supports for the turns. Cardboard on a quick and dirty,
> some nicer insulating material for others (I use HDPE cutting boards).
> _______________________________________________
>
Clear plexiglas tube makes a really nice looking solenoid coil form.
73 Roger (K8RI)
>
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>
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