Bob,
WARNING: DO NOT USE 16 GAUGE FOR THE TOP HAT WIRES.
The top of the pole is very thin and will not support such heavy wire.
The top hat wires carry very little current and all you need is very thin wire
(i.e., 26 AWG works perfectly well and that is what Spiderbeam uses in their
vertical kits).
You may use THE WIREMAN “CQ-534” or “PolyStealth-26” for this.
If you absolutely must, then you may also use “PolyStealth-22” but DO NOT USE
ANYTHING THICKER!
On my private web site you will find instructions (with lengths meters and ft.)
for building an Inv.-L similar to what you are trying to do. The single wire
slopes down.
If you add a second wire, the length will need to be shortened slightly.
You’ll have to use trial and error to find the correct length, but the wires
are so long, they can be accessed from the ground without lowering the pole.
See: https://www.dj0ip.de/vertical-antennas/160m-inv-l-on-12m-pole/
BTW, I am the founder of Spiderbeam-US (2008) and have been the Tech Support
Manager at Spiderbeam in Germany for the past 10 years.
73 - Rick, DJ0IP
(Nr. Frankfurt, Germany)
May the Sunspots be with Us!
-----Original Message-----
From: Topband <topband-bounces+rick=dj0ip.de@contesting.com> On Behalf Of
Chortek, Robert L.
Sent: 10 April 2021 22:16
To: TopBand List <topband@contesting.com>
Subject: Topband: 43’ 80 Meter Vertical
Hoping to get some guidance from the antenna gurus here.
I’ve just built a 43’ vertical (14 GA THHN) supported by a Spiderbeam pole.
It’s base loaded and my RigExpert shows total loss, not counting Rrad, of 33
Ohms. It’s roughly 33 efficient.
Can someone tell me if I added two top hat wires 16 GA THHN sloping at 45
degrees “about” how long they would need to be to resonate at 3.545 MHZ.
I want to get “in the ballpark” before I start trimming.
Any help would be appreciated!!!!!
73 e DX,
Bob/AA6VB
Robert L. Chortek
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