Date: Thu, 7 Nov 2019 12:50:54 -0800
From: Elliott Lawrence <wa6tla@icloud.com>
To: towertalk@contesting.com
Subject: [TowerTalk] JK301 30M Dipole
<I have a12 year old Force12 30M linearly loaded dipole. It works fine when
the local sea air doesn?t cause the loading wire connections to corrode making
the antenna unusable. I?m tried of needing to repair the antenna every few
years!
<Im considering a JK301 that uses loading coils and should be much more
reliable. If someone has any experience with this antenna, I would appreciate
any comments. The JK Antenna website doesn?t show any access to the assembly
manual that I would like <to see before any purchase. I have made a request
for the manual from JK Antenna but so far no response.
<Thanks es 73,
<Elliott WA6TLA
## How long is the F12 30m dipole....tip to tip ? How far out are
the oem F12 insulators in each ele half ?
## another option is to toss all the LL wires, and wind hb
coils.... strapped across the oem F12 insulators in each leg. Summitt
racing and also Mc master carr sell AL tubing, 3003 alloy, in rolls.
Everything from 15-50 ft rolls. Any diam from .1875 up to .625
.1875 od would be ample.
## Then use a single Dacron truss for each ele half. Inboard ends of
each dacron truss can terminate on the mast.
## still another option is a hb full sized rotary dipole. Aprx 46-47
ft long. I already designed FS 30m eles using DXEs..... yagi
mechanical. 1.75 inch OD down to .375 OD tips. Good for > 100
mph..... and .5 inch ice + 40 mph.
## 30m band is only 50 khz wide... that alone simplifies the ant.
Then just a helical haipin across the feedpoint..... + CM choke.
Jim VE7RF
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