Re: SSTC & "Tesla rifle"

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

Original poster: "Scott Hanson" <huil888-at-surfside-dot-net> 

D.C Cox wrote:

"We are currently up to 9.5 feet on a 5.5 KVA SSTC".
Was this SSTC designed & built by Resonance Research Corporation? Where
would one look for photos or technical details?

Can you provide additional details about the AP national press release on
the "Tesla rifle"? Where and when was this published? Does an operating
example exist? Was this "Tesla rifle" designed and built by Resonance
Research Corp?

Both these projects sound interesting ........

Regards,
S. Hanson
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Friday, August 13, 2004 4:25 PM
Subject: Re: SSTC battle continues!


 > Original poster: "Dr. Resonance" <resonance-at-jvlnet-dot-com>
 >
 >
 > We are presently up to 290 cm ( 9.5 ft. ) on 5.5 kVA SSTC.  There was a
 > national press release on our "Tesla rifle" through the Associated Press a
 > few weeks ago.  We are working with Pete Bitar's Extreme Alternate Defense
 > Systems on this project.  With solid state technology it's easy to break
the
 > old rule for classic TCs of 1 kVA input per foot of spark output.
 >
 > Our second project is a Kinetic Resonance Energy Weapon (KREW for short)
 > that hopefully will be ready for a demo at our Open House on Sept. 4th.
 >
 > Dr. Resonance
 >
 > Resonance Research Corporation
 > E11870 Shadylane Rd.
 > Baraboo   WI   53913
 >  >
 >  > Yes, it can be a battle just getting a SSTC to work and stay working
for
 >  > more than 10 seconds. All those problems multiply as the coil gets
bigger
 >  > and more powerful.
 >  >
 >  > But knowledge of practical EE matters like layout, shielding and
grounding
 >  > can help you a lot. These are far more important than they were in
 > spark-gap
 >  > coiling- it takes a lot less interference to destabilise a
self-resonant
 >  > controller than to burn out an NST :(
 >  >
 >  > In practice, it's probably a good idea to build your SSTC controller,
and
 >  > plan the wires that connect it to power supplies, H-bridge, ground etc,
 > with
 >  > the same attention to shielding and grounding as a computer CPU box or
a
 >  > high-sensitivity radio receiver. Radio techniques are quite
appropriate,
 > as
 >  > the idea in a driver is to let the power supply and feedback signal
into
 > the
 >  > box, and let the gate drive out, while keeping all other
 > conducted/radiated
 >  > interference out.
 >  >
 >  > Possibly the worst offender is ground loops that include your SSTC
driver
 >  > circuit board. These can pick up magnetic field from the
primary/secondary
 >  > coils as well as the large dI/dt caused by an arc to ground.
 >  >
 >  > Another bad source of interference is the dV/dt caused by an arc to
 > ground-
 >  > as the toroid capacitance is suddenly discharged to ground, it pulls
the
 >  > local RF ground up to a remarkably high voltage. This effect is
discussed
 > in
 >  > textbooks on commercial lightning protection. It can cause
electrostatic
 >  > coupling of hash into your control circuits, and even cause the RF
 > "ground"
 >  > to arc over to your control circuits which are hooked to a different
(AC
 >  > line) ground.
 >  >
 >  >
 >  > Steve C.
 >  >
 >  > best SSTC spark so far: 185cm
 >  >
 >  > Death toll: 9 small IGBTs, 2 fast recovery diodes, 4 MOSFETs, 6
UCC3732x
 >  > driver chips, a pile of 555/74HCxx/LM339/2N3904/etc, a heap of fuses,
and
 >  > one 240V 40W filament bulb burnt out by ground strike current.
 >  >
 >