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Re: [TCML] DIY Tank Capacitor - Plate configuration confusion
<SNIP><SNIP><SNIP>
Elated greetings to all from "Darkest Africa" :-)
I see that Brian has beaten me to it and forwarded Jeff Behary's
response to the list for which I am most grateful! I have appended a
copy of his response to the end of this post for any who might have
missed it!
Just a quick note on why I wanted to add (one or more) "floating"
plates into the capacitor when I could achieve the same by increasing
the thickness of the dialectric.......
With 2 plates; the dialectric material (of any thickness) between the
plates would need to take the full brunt of the applied voltage. In
the theoretical instance of a series stacked plate capacitor, I would
be able to use much thinner dialectric (in my case 3 layers of 0.5mil
polyethylene for a total of 1.5mils) between the plates because the
applied voltage would be SPLIT (almost equally) across the series
stacked plates. ie. Building a single capacitor stack to achieve the
same as connecting many in series with external wiring thus reducing
complexity and increasing overall reliability as a result of the
simplification. A more compact system with fewer external connections
should also have a very positive effect on the performance of the
capacitor bank as a whole.
My thanks to Brian for his initial comments and for pointing me in the
right direction! My thanks also to Gary for his input on this topic
and for pointing out that all dialectrics have a "Corona Inception
Voltage" regardless of their thickness! Very interesting indeed! My
thanks also to everyone else who took the time to comment and put
their viewpoints forward especially considering how new I am to the
list. My most grateful appreciation to you all!
Happy coiling!
Grant aka FreakyG
Randburg, South Africa
-------- Response from Jeff Behary of The Turn Of The Century
Electrotherapy Museum --------
From: Jeff Behary
To: Grant Visser ; BRIAN FOLEY
Sent: Wednesday, September 24, 2008 11:14 PM
Subject: RE: Tank Capacitor Problem - Brian sent me ;)
Grant,
I have time for as many interruptions as needed, even if it means in
the middle of replacing the entire plumbing system in our kitchen and
back yard ($5000 later, ouch, 1925 cast iron pipes suddenly gave
way...in a bad way!)
I have to dig up some references for you, ca. 1912 or so. Your method
not only was successful, it was even manufactured. I think one of the
tradenames was "Monolith", or something similar. (Or was that a T-Rex
song?)
<digging><digging><digging>
AH HA! Wow, Rochefort made it! That's wild. I didn't realise that
part - they manufactured (Octave Maximilien Rochefort and Alfred
Wydts) some neat Tesla and induction coils in Paris.
But we're talking series-parallel caps: Here you go!
http://www.electrotherapymuseum.com/Library/TouseyMedicalElectricity/Dynamic_Electricity/images/Page0236.jpg
I think this is what you mean.
The browsable page is here:
http://www.electrotherapymuseum.com/Library/TouseyMedicalElectricity/Dynamic_Electricity/pages/Page0236.htm
Check out this chapter/book in general. Its nice! I even think there
is one on Ebay now. Damn expensive though, but I remember once when
you couldn't get a copy for less than $300. Its the size of a large
phone book!
Good job. It does make sense. It does work. Convenient and
practical. I remembered that page from first seeing it over ...
geez...well, 12 years at least. If I could only remember something
useful, like taking out the trash on the correct night. At least I
remembered what book it was in.
You might try it with overhead transparencies. They might not be
perfect, but they're see-through, fairly cheap, and easy to work with.
You can forward this to the TCML list for anyone interested. I
unsubscribed a while back, and haven't paid any attention to things
lately.
Jeff Behary, c/o
The Turn Of The Century Electrotherapy Museum
http://www.electrotherapymuseum.com
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