If it will be of any help I seem to remember measuring all 4 of mine and
got an average value of ~13.8 uH.
Gedas, W8BYA EN70JT
Gallery at http://w8bya.com
Light travels faster than sound....
This is why some people appear bright until you hear them speak.
On 9/27/2020 3:57 PM, Jim Thomson wrote:
Date: Sat, 26 Sep 2020 21:10:47 -0400
From: <john@kk9a.com>
To: <towertalk@contesting.com>
Subject: Re: [TowerTalk] 40 meter beam
<I believe Cushcraft uses 68 turns of 12 AWG wire. There are much more
<efficient loading coil designs that are also more durable.
<John KK9A
## https://www.qsl.net/ve6wz/CC_coil.html Just about anything is better
than 68 turns of 12 gauge magnet wire..with turns butted tight..
The latest version of the coil software by k6sti is called 3.95
http://ham-radio.com/k6sti/ scroll to bottom of left side of page.
Coil Inductance and Q Calculator 3.95
.75 inch OD aluminum tubing, like 3003 is very easy to work with.
Mcmaster carr sells it, and other sizes.
Jim VE7RF
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