Re: In vs. Out [small magnefier ]
Sent: Monday, July 21, 1997 1:07 PM
Subject: Re: In vs. Out [small magnefier ]
In a message dated 97-07-21 10:14:54 EDT, you write:
<< > Hi Rich:
> Was wondering if anyone in your group ever tried to drive a small
> with a high power vacuum tube setup? I have an 803 with matching 3,000
> volt, 1.2 ampere power supply and matching filiment xmfr. I thought in
> might be fun trying to drive a small magnifier/resonator setup. I have in
> mind an 12 dia. sec coil closewound with #6 AWG and a 20 in. dia. primary
> of 30-60 turns with tuning taps. This sec. coil to be about 24 inches
> long. Resonator coil would be a 24 inch long winding of #14 AWG 3 kv PVC
> insulated wire -- closewound. Perhaps a 24 x 5 toroid on top of resonator
> and a small toroid of 1 inch dia. copper tubing atop the driver sec. coil.
> I'm not looking for spark-excited performance but thought a nice 36-48
> discharge would be a good starting point.
> Comments or suggestions from you or John Freau most welcome.
> DC at DR.RESONANCE-at-next-wave-dot-net
I almost forgot to mention my early tube magnifier work that I did
four years ago. This was a larger system which gave 26" + sparks,
and drew 7200 + VA. I called the coil a "Tube-Mag".
More primary turns may have helped its efficiency?
Pri. 14 turns of 8281 coax cable
sec. #14 magnet wire on a poly form 17" dia x 16" high
k = .5
Resonator, #20 magnet wire on a 10 1/2" dia x 16" high form
Toroid, 4" x 17" aluminum ducting with sharp point for spark emissions
Tubes, Four 833A transmitting tubes
Powered by a 5kVA, 7200 volt pole transformer