Re: Diathermy

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Ed Phillips by way of Terry Fritz <twftesla-at-qwest-dot-net>" <evp-at-pacbell-dot-net>

Tesla list wrote:
 >
 > Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" 
<BillEaver-at-aol-dot-com>
 >
 > As the Tesla coil that could be built from a Diathermy Machine...
 > Please contact me off list if you have a Diathermy for sale.
 > My Father wants to buy one.
 > Denis KC6TRW

	I assume this refers to a tube type unit.  A small TC can also be
powered up from a spark-type diathermy unit such as used to be for sale
dirt cheap at swap meets.  Basic ingredients are a high-voltage
transformer, energy storage capacitor, some kind of a tank coil and an
impressive spark gap (usually multiple gaps in series) on the panel.  I
have one here which has a 3500 volt transformer and an 0.004 mfd
capacitor.  Tunes to about 2 MHz with the internal coil. I've been
intending for years to build a coil using it as a base, but like a lot
of other projects haven't gotten around to it. Harry Goldman has quite a
collection of the gadgets, but don't think he ever modified one either.

	Unfortunately, someone must have decided these things are
"collectibles" and the last time I saw one (Rose Bowl swap meet) the guy
wanted $350 for one in lousy shape without a case.  Someone must have
bought it, as it was gone when I walked by his table later.

Ed