[TowerTalk] 40 meter beam

[Jim Thomson]

Date: Sat, 26 Sep 2020 21:10:47 -0400
From: <john at kk9a.com>
To: <towertalk at 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