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Oil filled Secondary Coil


From: 	richard hull[SMTP:rhull-at-richmond.infi-dot-net]
Sent: 	Wednesday, September 24, 1997 6:23 PM
To: 	Tesla List
Subject: 	Re: Oil filled Secondary Coil

At 08:53 AM 9/24/97 -0500, you wrote:
>
>From: 	gweaver[SMTP:gweaver-at-earthlink-dot-net]
>Sent: 	Wednesday, September 24, 1997 12:30 AM
>To: 	Tesla-at-pupman-dot-com
>Subject: 	Oil filled Secondary Coil
>
>I have an idea but before I build it I thought I would ask if anyone has
>tried this or if anyone thinks its worth trying.
>
>It seem that all Tesla Coils have a power limit.  For example if you powered
>a 3" secondary coil with 10,000. watts it would be too much power.  A
>reasonable power rating for a 3" coil would be about 500 to 700 watts.  A 4"
>coil could be powered up to about 1500  to 2000 watts.  And so on.
>
>If a coil is powered to its limit.  The limit being the point where it can
>not produce longer output spark because it is over powered and has reached
>it limit. Problems like racing sparks the length of the secondary coil would
>limit the TC output.
>
>If a secondary coils is placed in high voltage oil to stop secondary coil
>arcs and sparks.  Could the power of the TC then be expected to increase
>beyond its limit?
>
>My goal here is to find out if a TC output can be increased by changing
>coupling between the primary and secondary coil without over coupling the
>system at the point where it overcoupled before and without increasing the
>power.
>
>My ideas is to put a 4" secondary coil inside of a 6" PVC pipe.  Put end
>caps on both ends of the 6" pipe.  The secondary coil wire can be attached
>to a screw terminal on each end cap.
>
>Gary Weaver
>
>
>
>Gary,

Over 5 such coils were made in our Richmond group in the early 90's.  They
are very nice but not worth the effort at all.  This was our finding.  Chuck
Cook of Missouri has built one and others as well.  All work OK but there is
the problem of the outer tube, and at some point the dielectric surface
conduction problem will occur unless very large separation between resonator
and oil tank walls take place.  It is my feeling that surface conduction on
the surface of the wires would occur anyway, ultimately, wire to wire in
really bad circumstances.

Air is still one of the best insulators if field control is exercised.


Richard Hull, TCBOR