Original poster: robert & june heidlebaugh <rheidlebaugh-at-desertgate-dot-com>
The perception of red plates is misleading. When a metal plate glows the
power is not at max levels, When a grey graphite plate starts to glow you
are at about twice the rated power level. I have run graphite plate tubes
way beyond rated levels with special oil cooling to prevent the glass from
melting well beyond the distruction point of metal plate tubes. So the rule
of leting 833a metal plate tubes glow is correct because when a graphite
plate reaches the glow point you are well beyond melt dowm power.
Robert H
--
> From: "Tesla list" <tesla-at-pupman-dot-com>
> Date: Wed, 24 Dec 2003 09:59:15 -0700
> To: tesla-at-pupman-dot-com
> Subject: Re: new single 833A VTTC
> Resent-From: tesla-at-pupman-dot-com
> Resent-Date: Wed, 24 Dec 2003 10:52:45 -0700
>
> Original poster: "Jim Mitchell" <electrontube-at-sbcglobal-dot-net>
>
> Running a tube with a metal plate such as the 833A I belive it is OK to run
> with a cherry red/orange plate, if it starts showing light orange/ yellow,
> you are bound to do dammage. You could try tuning it down on your variac
> right below the threshold of plate redness and see if your performance is
> hurt.
>
> Regards - Jim Mitchell
> ----- Original Message -----
> From: "Tesla list" <tesla-at-pupman-dot-com>
> To: <tesla-at-pupman-dot-com>
> Sent: Wednesday, December 24, 2003 12:45 AM
> Subject: Re: new single 833A VTTC
>
>
>> Original poster: "Steven Ward" <srward16-at-hotmail-dot-com>
>>
>> Hmm, okay, this means i have more work to do... i do not wish to accept
>> needing staccato to achieve a spark length that other coils have done
>> without the staccato. Tomorrow i will disable the staccato and work from
>> there. Also, i know its hard to explain with words, but how red is
>> 'acceptable redness' ? I have been letting the plate of my tube just
>> noticably get a pinkish glow to it in the center of the plate. At 30bps
> it
>> becomes much more noticable, but perhaps im over estimating the level of
>> redness. I would like to have this coil running at 22" with no staccato
>> and perhaps 24" with staccato... that to me would be an accomplishment for
>> what ive done so far with my VTTC work ;)
>>
>> Also, do your notes mention the parameters of your setup? mainly the tank
>> cap as well as the level shifter capacitor? Im using 2nf and 2uf
>> respectively. Oh, and how long could you run at 22" and
>> non-staccato? Just so i have something to go by. Im sure i could push it
>> for about 2 seconds before full redness sets in, but i have a feeling you
>> were able to run it for awhile at that power.
>>
>> Steve
>>
>>
>>> Steve,
>>>
>>> Nice results. I'm reading my old notes from 2/20/98. At that time
>>> I installed a level shifted MOT onto my large VTTC while using a
>>> single 833A tube. This arrangement gave 22" sparks without
>>> staccato, and the tube ran with acceptable redness. The coil
>>> drew 15A at 120 volts.
>>>
>>> Just previous to my work, Rob Stevens of Canada built a magnifier
>>> VTTC using a single 833A and level shifted MOT. His setup also
>>> drew 15A at 120 volts, and gave the same 22" spark length. It
>>> was not a staccato coil.
>>>
>>> Holiday Cheers,
>>> John
>>
>> _
>>
>>
>
>