Original poster: Ed Phillips <evp@xxxxxxxxxxx>
Original poster: "Jeff Behary" <jeff_behary@xxxxxxxxxxx>
Hello All,
I've developed a special adjustable capacitor for tuning Tesla Coils.
I've tested and used it for 2 years, and was going to patent the
idea but honestly can't afford to. So here it goes, an adjustable
capacitor rated from .001 mfd to 1 mfd in .001 mfd increments...it
can tune any Tesla Coil exactly and can be easily built by all by
off-the-shelf materials. Best of all there are no moving
parts...its all done mathematically - and using simple math no less!
http://www.electrotherapymuseum.com/2006/FloorModelPancake/AdjCap.htm
Jeff Behary, c/o
The Turn Of The Century Electrotherapy Museum
http://www.electrotherapymuseum.com";
The same general "binary" design, sometimes using special
switches and sometimes how, has been in use for a very long
time. I have a bunch of power factor correction capacitors fof WW2
airborne radios which operated from 400~ power. They go from 1 ufd
to 21 ufd in 1 ufd steps.
I just connect to them with toggle switches and find them very useful.
I'm pretty sure a lot of precision resistor boxes do the same thing,
adding in series rather than in parallel.