Re: In vs. Out [small magnefier ]
Sent: Tuesday, July 22, 1997 5:20 PM
To: Tesla List
Subject: Re: In vs. Out [small magnefier ]
Thanks for the data -- we'll roll up our sleeves and do some experiments!!
> From: Tesla List <tesla-at-pupman-dot-com>
> To: 'Tesla List' <tesla-at-poodle.pupman-dot-com>
> Subject: FW: In vs. Out [small magnefier ]
> Date: Tuesday,July 22,1997 11:07 AM
> From: richard hull[SMTP:rhull-at-richmond.infi-dot-net]
> Sent: Monday, July 21, 1997 1:47 PM
> To: Tesla List
> Subject: Re: In vs. Out [small magnefier ]
> At 03:20 AM 7/21/97 -0500, you wrote:
> >From: DR.RESONANCE[SMTP:DR.RESONANCE-at-next-wave-dot-net]
> >Sent: Sunday, July 20, 1997 6:21 PM
> >To: Tesla List
> >Subject: Re: In vs. Out
> >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
> >mind an 12 dia. sec coil closewound with #6 AWG and a 20 in. dia.
> >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
> >insulated wire -- closewound. Perhaps a 24 x 5 toroid on top of
> >and a small toroid of 1 inch dia. copper tubing atop the driver sec.
> >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
> Dr. R
> Any vacuum tube used in a magnifier situation would have to be used as a
> true switch and not as a classic oscillator with feedback. This leaves
> vacuum tubes at a great disadvantage as they can handle the volts, but
> the amps. (for larger systems.)
> John Freau's notes on his use of the tubes are well taken. There is a
> of dielectric heating and other losses associated with oscillating tube
> In the book "Pulse Generators" 1948, a whole chapter is devoted to hard
> vacuum tube pulse circuits. The 304TL is held in high regard in this
> discussion. The real advantage of such tubes is they can be controlled
> easily for longer on times than H2 Thyratrons and might supply a very
> distinct edge in very small magnifier systems.
> I have not physically investigated hard vacuum tubes in magnifier
> Richard Hull, TCBOR