[TowerTalk] Another Cushcraft shorty-forty question

[Jim Thomson]

Date: Thu, 06 Aug 2015 20:02:29 -0400
From: RMorris <robrk at nidhog.net>
To: George Dubovsky <n4ua.va at gmail.com>, kz8e at wt.net, towertalk
<towertalk at contesting.com>, Tim Jellison <kl7wv at kl7wv.com>
Subject: Re: [TowerTalk] Another Cushcraft shorty-forty question

Some folks have change their shorty(s) into Moxons getting away from loading wires and weak tips. Check K3LR.com for links.

##  another option is to toss the 68 turns of 12 ga magnet wire used to wind the oem coils..and replace with
3/16 inch Al tubing coils.   8 ohms  vs .8 ohm.    http://www.qsl.net/ve6wz/CC_coil.html  If cu is used, it drops down to .5 ohm. 

##  Ken at W3JK, uses  .25 inch solid AL for his 40m coils..then just uses AL standoffs at each end of the coil...
similar to what F-12 used on there yagis.    The .25 inch al solid coils are stuffed into the .25 inch hole at the end of the
al standoff....and protrude a bit out the other side.  Then just tig or heliarc wled em.   Solid connection, zero ohms. 
3/16 solid AL could also be used. 

##  I used .375 silver plated CU tubing to replace the LL rods on my F12  340N.   .07 ohm per coil.  

##  IMO, the oem 12 ga magnet wire that CC used on solid fiberglass has way too much loss for the loading 
application. 

Jim   VE7RF