Re: Big Triode Tubes

To: tesla-at-pupman-dot-com
Subject: Re: Big Triode Tubes
From: Dan Gowin <gowin-at-epic-1.nwscc.sea06.navy.mil>
Date: Mon, 09 Sep 1996 08:41:56 -0500
Tesla List wrote:
> 
> > Subject: Re: Big Triode Tubes
> > Subject: Re: Big Triode Tubes
> 
> >From huffman-at-fnal.govFri Sep  6 22:12:13 1996
> Date: Fri, 6 Sep 1996 09:13:16 -0500
> From: huffman <huffman-at-fnal.gov>
> To: tesla-at-pupman-dot-com
> Subject: Re: Big Triode Tubes
> 
> Just a thought here. Since the neon output power is limited, the filament
> might not get up to speed due to the low cold resistance. On the other hand
> it would seem to be an automatic mechanism for slow starting, like a variac
> would due.
> Dave Huffman
> ----------
> > From: Tesla List <tesla-at-poodle.pupman-dot-com>
> > To: Tesla-list-subscribers-at-poodle.pupman-dot-com
> > Subject: Re: Big Triode Tubes
> > Date: Friday, September 06, 1996 4:25 AM
> >
> > >From MALCOLM-at-directorate.wnp.ac.nzThu Sep  5 22:26:04 1996
> > Date: Fri, 6 Sep 1996 14:09:46 +1200
> > From: Malcolm Watts <MALCOLM-at-directorate.wnp.ac.nz>
> > To: tesla-at-pupman-dot-com
> > Subject: Re: Big Triode Tubes
> >
> > Just a thought if anyone considers rewinding a neon for a bottle
> > power supply...
> >
> > > >   How about an ARC welder! I'm being sarcastic, the tube I'm
> > > >looking at is 7.5 V at 100 Amps on the filament. I'll probably use
> > > >a balanced neon for the plate, but I'll need to experiment and find
> > > >what filament currents will work. I already recognize that if the
> > > >current is to low, it will take forever to heat the tube.
> > > >
> > > Dan,
> > >     How about a "blown" neon for the filament supply? 7.5V -at- 65A
> > > is 12 turns of #4 on 1 half of my dead jefferson 15kV 60mA neon.
> > > Winding the other side with the same number of turns will give you
> > > 7.5V -at- 130A. You could also put half as many turns on each side and
> > > then put them in series to put the center tap to ground.
> >
> > You could pop a heater winding on one leg and a suitable HT winding
> > on the other for an all-inclusive compact supply. The insulation
> > should certainly be there.
> >     I wonder about the wisdom of using the shunted core for a
> > filament supply though. Seems to me that voltage regulation will be
> > rather poor.
> >
> > Malcolm

All,
	Whenever the tube gets in I'll post my results.

Big Red HV Caps. Burn Baby Burn.
D. Gowin