[Lowfer] 185 overnight

Thu, 20 Mar 2003 17:51:51 -0600

I was using #12 THHN insulated copper for my inductors. I achieved a maximum
change in inductance of .584uh by using two turns of #12 and two Steward
(Digi P/N 240-2081-ND) ferrite beads being movable inside the two wire
turns.

Mike>WE0H

www.we0h.us/lf

-----Original Message-----
From: [email protected]
[mailto:[email protected]]
On Behalf Of Bill Ashlock
Sent: Thursday, March 20, 2003 2:04 AM
To: [email protected]
Subject: RE: [Lowfer] 185 overnight

Mike R,

>Hey Bill, can you help out Eric???

Why? You're doing pretty well, so far. I like to explain it along the lines
of the loop being a low impedance antenna that is not so sensitive to lossy
stray capacity from surrounding items. The proximity of the trees and the
ground look electrically like a capacitor in series with a resistance
connected to ground and this resistance eats precious power.

BTW Mike, I just installed a variable series inductor in place of the 100pf
variable capacitor to do the tuning for the test loop. I think this was your
idea, originally? I'm anxious to see what happens tomorrow morning when the
sun hits the final box. It's 24 deg right now. The variable inductor is 4T
of #14 wound on a 1/4" slug-tuned coil form.

Bill