VTTC Article Dual 811a

["Steve Rosenthal" <sdrosen-at-cwia-dot-com> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

For those who are interested in the article from the 1963 "Science
Experimenter" on the Dual 811a VTTC,
I have uploaded the first three pages to:
http://www-dot-netdrive-dot-com/~sdrosen

sdr



----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Wednesday, July 19, 2000 7:45 PM
Subject: Re: First VTTC light, and a few questions


> Original poster: "Grayson B Dietrich" <electrofire-at-juno-dot-com>
>
> Thanks! I was really puzzled at this (as was, apparently, everyone else
> ;-) I suspected that it might have something to do with RF, as so many
> wierd phenomena do...
>
>
> Grayson Dietrich
> http://www.electrophile.8m-dot-com
>
>
> On Wed, 19 Jul 2000 11:56:23 -0600 "Tesla list" <tesla-at-pupman-dot-com>
> writes:
> > Original poster: Parpp807-at-aol-dot-com
> >
> > In a message dated 7/19/00 9:17:28 AM Central Daylight Time,
> > tesla-at-pupman-dot-com
> > writes:
> >
> > <<  Filament Voltage: 6.6VAC (the meter reads a rising voltage as i
> > increase
> >  > the variac controlling plate voltage...  ...when the coil was
> > ill-behaved
> >  > it would increase to as much as 10V, now it only reaches
> > 7V...what is
> >  > happening?) >>
> >
> > Grayson,
> >
> > I solved that problem by bypassing to ground each leg of the
> > filament leads
> > with 0.02 - 0.05 uF capacitors. Place the caps right at the tube
> > socket(s).
> > You're getting RF into
> > the filament wiring.
> >
> > Cheers,
> > Ralph Zekelman
> >
> >
> >
> >
> >
>
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