Re: [TCML] Suggestions for a mini-TC?

[Ed Phillips <evp@xxxxxxxxxxx>]

Hi Jason,

I would consider using a 1.5 (7.5-9") or 2 (10 -12") form so that you can
get more turns on it with #30 and maintain the 5 or 6:1 aspect ration
suggested for small coils. Someone jump in here if I'm off, but usually we
like to see closer to 1000 turns to get the secondary inductance up. 

I forget who but someone made a tiny coil but the wire diameter went down
proportionally. I won't want to work with human hair sized wire... 
What are you going to power with this? I'm not sure a shoe box and in the
office is too good of idea for an "in the office toy"...for a ground plane
you could use a counterpoise which should fit a desktop.

Lastly, as you said, 1kv is hard to start an arc and a microwave oven
transformer is definitely a deadly toy if one gets bit(on the order of 2+kv,
~2kw) certainly enough to kill you.

Perhaps a 9kv 30ma old style neon transformer or an OBIT...anyone got one? I
like Steve's idea too.

Regards and Play Safe,
Jim Mora"

	I made a little coil with an approximately 1-1/2" diameter by 6" long secondary, wound with #36 wire as I recall.  I did it just to see if I could get a decent winding and by luck I did.  Works out to about 600 kHz resonant frequency with a 4" diameter toroid and puts out about 4 to 5 inch streamers when excited with a 2.8 kV, 20 ma transformer running about 50 watts input.  Pictures of it somewhere in hotstreamer.

Ed


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