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Re: Dump the RSG!


From: 	John H. Couture[SMTP:couturejh-at-worldnet.att-dot-net]
Sent: 	Thursday, November 06, 1997 6:20 PM
To: 	Tesla List
Subject: 	Re: Dump the RSG!

At 08:45 PM 11/6/97 +0000, you wrote:
>
>From: 	Jim Lux[SMTP:jimlux-at-earthlink-dot-net]
>Sent: 	Thursday, November 06, 1997 10:15 AM
>To: 	Tesla List
>Subject: 	Re: Dump the RSG!
>
>
>
>> 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
>
>Possibly an Ignitron or other mercury vapor switch tube? Ignitrons are
>fired by a voltage pulse to a trigger electrode. There is a bipolar Hg
>vapor tube that is fired by a magnetic field on the Hg vapor causing it to
>ionize, etc...

-----------------------------------------------------------------------

  Jim -

  We have replaced an RSG with a Jennings vacuum interrupter and it is
giving superior performance. They are tricky to adjust but once adjusted
require no further attention. There are no moving parts so there is no
maintenance. These are standard electric utility switches and are sometimes
available at surplus stores. Most people do not know what they are so they
are sometimes a real bargin. A typical unit is only 2 1/2 " diam x 6 " long
and cost $200 and up new. The rating is 34 KV, 10000 amps (momentary rating). 

  They will give you a dampened sine wave instead of a continuous sine wave
like solid state devices. A dampened sine wave gives a higher voltage for
the same energy and number of cycles compared to a continuous wave. They are
an ideal replacement for an RSG. However, more experimenting for Tesla coil
use is required.

  John Couture