Cecil Moore wrote:
Jim Kelley wrote:
VF = 0.04 is incredible.

A little knowledge and logic will make it clear.
My 75m Texas Bugcatcher coil is self resonant
at 8.2 MHz which by definition makes it 90 degrees
long. 90 degrees at 8.2 MHz in free space is 30 feet.

The coil is actually 6.5 inches long, i.e. 0.542 feet.

0.542/30 = 0.018 which is the VF of the Texas
Bugcatcher coil at its self-resonant frequency.

The Texas Bugcatcher coil is 4 tpi. The coil with
the VF = 0.04 is 10 tpi. It all makes sense.

Epicycles made a lot of sense, too. So, about that coil. I'm good in
the call book.

ac6xg

Jim Kelley wrote:
So, about that coil. I'm good in the call book.

That coil is being used on a bugstick on top of my
pickup. Just wrap 40 turns on a 4 inch diameter piece
of PCV and start alleviating your ignorance.
--
73, Cecil, IEEE, OOTC, http://www.w5dxp.com

Cecil Moore wrote:
Jim Kelley wrote:
So, about that coil. I'm good in the call book.

That coil is being used on a bugstick on top of my
pickup. Just wrap 40 turns on a 4 inch diameter piece
of PCV and start alleviating your ignorance.

If you are right then I would no longer be ignorant, and you would still
be boorish and asinine.

You seem reluctant to have your coil tested. I promise to return it to
you immediately after I make the measurements.

If I make the coil and the results turn out not to support your
contention, you would contend that the coil was made incorrectly. It's
better that you supply the coil - along with your claims about it. I'm
ready to be amazed, Cecil.

ac6xg

On Wed, 03 Jun 2009 16:28:06 -0700, Jim Kelley
wrote:

I'm ready to be amazed, Cecil.

Hi Jim,

Then you are due a picture of his stigmata of the microphone wound:
"Hertz, forgive them for they know not what mode they operate."

73's
Richard Clark, KB7QHC

Jim Kelley wrote:
If I make the coil and the results turn out not to support your
contention, you would contend that the coil was made incorrectly.

Nope, I won't do that. Any large air-core loading coil will
do. All it has to satisfy is the Corum test on page 4:

5ND^2/WL 1

I'll send you an EXCEL file that makes that test.
--
73, Cecil, IEEE, OOTC, http://www.w5dxp.com