TSSP: List Archives

From: "Barton B. Anderson"
Date: Sun, 10 Mar 2002 00:15:52 +0000
Subject: Re: [TSSP] short H/D

Terry -

The sonotube coil I sent you (the 1:1 sonotube) might be able to be used as is.
It would be a matter of using an exacto knife to slice into the spar varnish
(peels off easily), snipping the wire in predetermined points, making a 90 deg
bend up. Each wire with a 1/4" of protrusion should yield a 1/2" of spacing
between the two. The ends of the wire might be able to be sliced down the
center (it's somewhat large wire) to fit in resistor leads. The only real
advantage is that the rest of the coil is already set in place and held by the
coating.

Just a thought. May be easier to simply wind a new coil on a Home Depot bucket.
If you do, that carpet tape may still come in handy (if you know what I mean).

Take care,
Bart

"Terrell W. Fritz" wrote:

> Hi Paul,
>
> Sounds reasonable.
>
> I have 24 gauge wire and the taps can be those little clip jumpers they use
> in computers to set hard drives / mother boards and such.  I can easily get
> that stuff from DigiKey.  I have all sizes of surface mount resistors but
> they make them in all values.
>
> I would propose a fairly large coil to eliminate little defects and such.
> Perhaps a 12 inch Sonotube or a large plastic trash can or something.  The
> large cans tend to be a little cone section shaped with the base smaller
> than the top which may be a problem.  Sonotube has odd losses but they are
> stable for a short time frame.
>
> Don't mention flat coils to me :o))  I must have fallen down a spiral stair
> case or something as a child.  I am just not a flat coil guy.  Spinning
> those things drive me nuts and I have no talent for it...  Others will have
> to figure that out.
>
> How about a 12 inch diameter Sonotube wrapped to the length of your choice
> with #24 wire and taped say every inch. If you could give me a rough
> resistor value that would help too.  I think the taps should be evenly
> space since if they are not, someone may blame the current profile on non
> uniform taps messing with something.  I think I have the measurement
> instruments part covered but if there is a special technique you like let
> me know too.
>
> If you could give me an idea of good sizes, resistor values, and such I can
> work on this and get it going.
>
> Cheers,
>
>         Terry
>
> At 10:16 PM 3/9/2002 +0000, you wrote:
> >Hi Terry,
> >
> >I'm looking for unequivocal experimental evidence that the current
> >in a resonating coil can exceed the base current by quite a
> >noticeable amount in some geometries.  This would provide an
> >experimental answer to Antonio's question to me from the pupman
> >list today:
> >
> >> Can Les be greater than Ldc?
> snip....


Maintainer Paul Nicholson, paul@abelian.demon.co.uk.