[TowerTalk] Tesla's birthday

[Roger (K8RI)]

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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