Re: Swordlike RF Envelope (Oscilloscope)

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

Original poster: "by way of Terry Fritz <teslalist-at-qwest-dot-net>" <dhmccauley-at-spacecatlighting-dot-com>


Although SSTC's also have the "sword-like" arcs, they aren't as straight as
the ones produced by a VTTC, although some individuals are trying to
duplicate this on their SSTCs.
I agree that Richie and James SSTC's do produce somewhat straight arcs, they
aren't the typical "sword-like" streamers produced by VTTCs.  I've seen
Richie's SSTCs in action (video)
and unless he did something different very recently, it still the typical
SSTC type output.  SSTC streamers, although straight and narrow, still have
considerable jagged-ness to them centered about
the straight and narrow part of the streamer.  VTTC streamers are similar,
but that ripple jagged-ness is much much less and during a good run won't
even be noticeable.

The Captain



 > >Just wanted to post the RF envelope from my dual 833A VTTC during
extremely
 > >straight swordlike operations.
 >
 > I just saw Richie Burnett and James Riggs demonstrating SSTCs at the UK
 > Teslathon. Both produced very nice sword sparks. They were running at
50pps
 > but if they had been staccato'd to a lower rate the results would probably
 > have been very similar to the pics that Steve Ward and Cap'n Corona have
 > shown us.
 >
 > Both of these coils used a full-bridge of 15A MOSFETs running off 240V
 > half-rectified line. Resonant frequency around 400kHz. The peak power was
 > over 3kW which is similar to a dual 833A VTTC. Although they were
 > oscillator-based SSTCs they used a VCO circuit that makes the frequency
 > change in sympathy with the DC link voltage. I think there are more
details
 > of this design on http://www.richieburnett.co.uk/
 >
 > I got a couple of decent photographs of the sparks. My website will be
down
 > for a while but pictures (either mine or someone else's) will hopefully
 > appear somewhere sooner or later.
 >
 > Steve C.
 >
 >
 >
 >
 >
 >
 >
 >