[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: 6ga wire vs 1/4 tubing for 900W coil primary?

Original poster: "Mike" <mike.marcum@xxxxxxxxxxxx>

I was thinking of doing something similar with 420-strand 38 awg litz ($20 per 50ft off ebay), only have it a solenoid with a fixed top and movable bottom to stretch/compress the coil with a gear motor to vary the L while it was running. Only thing I gotta figure out is how to keep a space between turns so it doesn't short out when it's compressing, unfortunately it's unserved, but still saved $50 per pound off new wire.

Mike
----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Friday, July 29, 2005 8:46 PM
Subject: Re: 6ga wire vs 1/4 tubing for 900W coil primary?


Original poster: Terry Fritz <vardin@xxxxxxxxxxxxxxxxxxxxxxx>

Hi,

Since the wire is flexible, one might be able to make a variometer. If the last turn or so was reversed and wound in the opposite direction, perhaps you could have a way to wrap more or less of it in the main direction to vary the inductance.

Perhaps the outer opposing turns could be wound on a circular part that could be rotated to wind or unwind the wire.

Or, extra wire could be spooled up and unwound off a small off-axis spool as needed.

Just a thought,

Cheers,

        Terry


At 04:42 PM 7/29/2005, you wrote:
In a message dated 7/29/05 6:13:27 P.M. Eastern Daylight Time, tesla@xxxxxxxxxx writes:
One problem is tuning. With copper tubing you can just hook to it
anywhere with a fuse clip to tune the primary. But insulated wire
requires you to cut a lot of tap points in the insulation or just get
it right the first time.

Cheers,

         Terry


Hi,
Remember, any time you change anything about the coil including adjusting the topload height, moving the coil and/or stuff in the room near it, you will have to do some retuning. Murphy's law gaurantees that the new tuning point will lie just under the insulation you haven't cut off YET. ;^))

Matt D.