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Re: Dump the RSG!
From: ghunter-at-mail.enterprise-dot-net[SMTP:ghunter-at-mail.enterprise-dot-net]
Sent: Thursday, November 06, 1997 4:51 PM
To: Tesla List
Subject: Re: Dump the RSG!
Randy,
I'm no engineer, but I have some grasp of tube fundamentals. In
answer to your question: Yes, +B can be supplied to the plate
through the primary tank circuit. This arrangement is familiar to
anyone who has ever studied vacuum tube oscillators or
transmitters. You are right in thinking that a properly tuned &
loaded primary circuit will present the correct impedance to the
tube--it will. The +B supply appears to be shorted directly to the
plate through the primary--true enough at DC, but it's RF impedance
that counts here, and the resonant tank circuit presents a much
higher impedance at the operating frequency. Ask an elderly ham
radio buff about "dipping" the transmitter plate current some time.
As for pulsed tube operation, I have an idea or two about that. Ever
heard of a super-regenerative oscillator? Next time!
Greg
To: "'Tesla List'" <tesla-at-poodle.pupman-dot-com>
Subject: Re: Dump the RSG!
Date: Wed, 5 Nov 1997 23:35:41 -0600
From: Tesla List <tesla-at-pupman-dot-com>
From: randy-at-gte-dot-net[SMTP:randy-at-gte-dot-net]
Sent: Thursday, November 06, 1997 1:36 AM
To: Tesla List
Subject: Re: Dump the RSG!
Tesla List wrote:
>
> From: David Huffman[SMTP:huffman-at-FNAL.GOV]
> Sent: Wednesday, November 05, 1997 8:39 AM
> To: Tesla List
> Subject: Re: Dump the RSG!
>
> What if the coronatron was run in pulsed mode? Has it been and does it look
> like a RSG at the same BPS? Isn't the whole idea here to quench at the first
> null to keep the energy in the secondary?
> Dave Huffman
I am very interested in the answer to this.
What I have been pondering lately, alot, is:
What if the B+ supply to the tube anode was fed
THRU THE PRIMARY, relying on the reactance of the
primary/secondary combo to present the proper impedance
to the tube, rather than a near-short-circuit.
OF course, there are alot of safety considerations.
Naturally, the load will vary greatly according to what
the arc "sees" at any given moment.
There are countless other considerations.
I would just like the consensus of the group as to
_whether_ this could work.
Again, I am talking in terms of pulsed operation, along
the lines of the original post. NOT a cw tube coil.
I know Richard Hull says that thermionic emission just won't
cut the mustard, but sometimes you DO have to dump a ton
(or tonne) of bricks on my head to make me think straight.
I am trying to find out if an acquaintance of mine from some
years ago is still around, he was/is a vacuum tube design engineer,
and I recall him telling me about designing a tube for use in
switching currents to a commercial induction furnace, for switching
the juice on and off, and I have to believe that would involve
huge emissions. And I dont mean fifty years ago; when I last saw
him, he was retired, but still designing freelance, due to popular
demand. (I am 37 years old)
Food for thought....
Randy