RE: 18" sparks at 2KVA, 833a higher voltages

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Jim Mora" <jmora@xxxxxxxxxxx>

Hi Cameron,

John's site (futuret) has pictures of a (3) 833a VTTC sparking wildly
powered by a 7500volt Pole pig. Tip: Bert Hickman told me there is a way to
"ping" the tubes with a 10KV adj HV supply to increase their voltage
tolerance.

Jim Mora

-----Original Message-----
From: Tesla list [mailto:tesla@xxxxxxxxxx]
Sent: Friday, February 09, 2007 7:58 PM
To: tesla@xxxxxxxxxx
Subject: RE: 18" sparks at 2KVA

Original poster: "Cameron B. Prince" <cplists@xxxxxxxxxxxxxxxxx>

Hi Brett,

Glad to hear about the success with your VTTC. The photos and video clips
are very impressive, especially for a first run.

If you like the non-staccato mode, I would recommend the 833C. It can
basically run non-staccato in a VTTC all day long and not even show a hint
of plate glow. I recently picked up one on eBay and began playing with it.
It's significantly more robust than the 833A.

I finally got my staccato board repaired earlier this week. That and the
replacement MOT's (one of mine was toasted due to primary shorting to
chassis) have my v8 coil back up and running. I hope to get everything tuned
back in and start seeing those 3' arcs again soon.

I also borrowed a 7,200V PT from David Rieben with plans to build another,
larger VTTC. I hope to try to compare a VTTC driven by a doubler with a
non-doubled supply. I also want to see what an 833A will really take
voltage-wise in a VTTC as I may try a doubler on the PT as well.

Keep us posted on your progress.

Thanks,
Cameron


 > -----Original Message-----
 > From: Tesla list [mailto:tesla@xxxxxxxxxx]
 > Sent: Thursday, February 08, 2007 10:37 PM
 > To: tesla@xxxxxxxxxx
 > Subject: 18" sparks at 2KVA
 >
 > Original poster: Brett Miller <brmtesla2@xxxxxxxxx>
 >
 > Tube Coilers...
 >
 > As of today (February 8, 07) I am getting consistant
 > 18" sparks (a little longer to a grounded target) with
 > 2kva input to the plate transformer.
 >
 > Specs are the same, but I have moved the feedback coil
 > back up to the top of the former (a la Cameron
 > Prince's vttc).  This has seemed to result in a
 > decrease in wallplug input on two seperate occations.
 > The plate is still running a medium orange, which
 > turns to bright orange as the voltage approaches 140
 > on the variac.
 >
 > My latest run (a couple minutes ago) resulted in 18"
 > sparks with 16a 130v input for 2080va fluctuating at
 > times to 17A -- 2210va.
 >
 > ---
 >
 > I was wanting to hold out on running the coil until I
 > got the staccato board together, but I can't do it.  I
 > love the look and sound of the 60hz doubler operation.
 >   For anyone in doubt, building a vttc is definately
 > worth it, aesthetically it is a completely different
 > animal than a disruptive coil.  And if you are a
 > self-taught amateur like myself, you will learn quite
 > a bit in the endeavor.
 >
 > -Brett
 >
 >
 >
 >
__________________________________________________________________________
 > __________
 > Bored stiff? Loosen up...
 > Download and play hundreds of games for free on Yahoo! Games.
 > http://games.yahoo.com/games/front