Re: In vs. Out [small magnefier ]

To: "'Tesla List'" <tesla-at-poodle.pupman-dot-com>
Subject: Re: In vs. Out [small magnefier ]
From: Tesla List <tesla-at-stic-dot-net>
Date: Wed, 23 Jul 1997 12:17:03 -0500
Approved: tesla-at-stic-dot-net

From: 	DR.RESONANCE[SMTP:DR.RESONANCE-at-next-wave-dot-net]
Sent: 	Tuesday, July 22, 1997 5:20 PM
To: 	Tesla List
Subject: 	Re: In vs. Out [small magnefier ]

Hi Rich:

Thanks for the data -- we'll roll up our sleeves and do some experiments!!

DR.RESONANCE-at-next-wave-dot-net


----------
> 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
magnifier
> >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
inch
> >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
true
> vacuum tubes at a great disadvantage as they can handle the volts, but
not
> the amps. (for larger systems.)  
> 
> John Freau's notes on his use of the tubes are well taken.  There is a
lot
> of dielectric heating and other losses associated with oscillating tube
systems.
> 
> 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
systems.
> 
> Richard Hull, TCBOR
> 
>