Re: Redesigning/tuning a coil

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

Original poster: "Dr. Resonance" <resonance-at-jvlnet-dot-com> 


This would work, but now you have another inductor you have to insulate from
ground due to the HV on it.  This takes up unnecessary space.  Also, the
off-axis can not be mounted under the coil as the magnetic field from the
pri might interact with it.

It's best to use the scrap wire routine to determine the correct number of
turns before you build your final primary.

If you already have a nice primary, even copper tubing, you can still solder
some 12 AWG onto the end of the outermost turn and then use the cardboard to
support it out into the air beyond the dia. edge of the oscillator base.
Just use some 2" clear shipping tape (not duct tape) to tape the cardboard
into place.  It's rough but the electrons don't really care.

Add another 6-8 turns and then check your resonance point.

Dr. Resonance

Resonance Research Corporation
E11870 Shadylane Rd.
Baraboo   WI   53913
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Sunday, April 18, 2004 10:23 AM
Subject: Re: Redesigning/tuning a coil


 > Original poster: pepperman-at-SoftHome-dot-net
 >
 > Just another thought about my limited primary--if having a high
 > enough primary inductance is the reason for wanting the coil to
 > tune at 10-15 turns, what about just adding an off-axis inductor?
 > Would this do the same thing?  If I did it, what would be the
 > minimum acceptable wire/tubing diameter?  Since I very well may
 > not be able to get more of the 1/4" copper fast enough, I'll probably
 > need to try something else.
 >
 > Michael Johnson
 >
 >
 >