Re: 811A first light

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Area31 Research Facility by way of Terry Fritz <twftesla-at-qwest-dot-net>" <rwstephens-at-hurontario-dot-net>

Ed,
 
You have a good idea there.  Please keep the list posted.
 
Robert W. Stephens
>
> ----- Original Message ----- 
> From: <mailto:tesla-at-pupman-dot-com>Tesla list 
> To: <mailto:tesla-at-pupman-dot-com>tesla-at-pupman-dot-com 
> Sent: Thursday, July 12, 2001 19:49
> Subject: Re: 811A first light
>
> Original poster: "Ed Phillips by way of Terry Fritz
> <<mailto:twftesla-at-qwest-dot-net>twftesla-at-qwest-dot-net>"
> <<mailto:evp-at-pacbell-dot-net>evp-at-pacbell-dot-net>
>
> Tesla list wrote:
> > 
> > Original poster: "Area31 Research Facility by way of Terry Fritz
> <<mailto:twftesla-at-qwest-dot-net>twftesla-at-qwest-dot-net>"
> <<mailto:rwstephens-at-hurontario-dot-net>rwstephens-at-hurontario-dot-net>
> > 
> > Unfortunately I never saw any of the previous postings on this thread.
> > 
> > Although I see Brent was careful (thanx Brent) to preface this carefully as
> > 'Hooooeeeey!', I wish to point out that as the inventor of the Coronatron I
> > reserve the intellectual property copyright on this name and immediate
> family
> > of descendant derivatives.  I will not consider releasing it until it has
> made
> > me at least ten cents profit.
> > 
> > As for the 4-1000.... I fully recognize that employing whatever
> components that
> > one can lay their hands on in the Tesla coil hobby is the rule, however I
> have
> > this to say. I get 22" out of a single 833A (without tube damage).  I would
> > expect 28" or better from a 3-1000 (an experiment I've never tried).  From
> a
> > 4-1000 I would expect possibly 24" but more likely grief, a melted screen
> grid
> > and thusly a ruined tube.  Tetrodes are ill suited to this application,
> which
> > would explain why industry doesn't use them in self-driven industrial
> > oscillators.  There is no shortage of entirely adequate large transmitting
> > triodes available for this application.
> > 
> > Dr. John, sell that new brand 4-1000 and socket to an amateur who needs
> it for
> > his big homebrew linear (ebay hint hint) and use the money to buy a valve
> with
> > one less 'ode.  If you have a TV station plate xfmer it sounds like a
> tube even
> > beefier than a something-1000 is in order. Try to find an external anode
> > glass-metal 3-2500 or newer ceramic-metal 3CX2500 with flying filament
> leads.
> > I had one until recently when, since I'm not doing any coiling anymore,
> it got
> > traded for a vintage TV set to an amateur who wanted it to melt ice off his
> > antenna.   I have an Eimac 3CX10,000D which I'd trade for the right,
> round CRT
> > vintage TV set, ....if you want to get really creative.
> > 
> > If you are an amateur that wants to melt ice off his antenna quickly, I
> also
> > have a Eimac 4CX15,000D with socket and filament transformer available.
> > 
> > Robert W. Stephens
>
> While not ALL power tetrodes are suitable for power oscillators, all
> ARE suitable for the power amplifier use for which they were attended. 
> A master oscillator power amplifier (MOPA) configuration using a lower
> power tube for the oscillator should work just fine, and allow
> independent adjustment of frequency, power primary tuning, and
> coupling.  Should be much simpler than trying to couple a power
> oscillator to a resonant and nonlinear load!  I intend to try it (albeit
> on a much smaller scale) when I get around to cleaning up my workshop so
> I have room to play.  (That's been a project for a couple of years, so
> don't expect immediate progress.)
>
> Ed
>