10-160M End-Fed HF and CB Antenna

Yes. Please see the manual for rope use here https://alphaantenna.com/manuals/JPole_Sr_v2.9_by_Alpha_Antenna.pdf

You may need one mainly if you are experiencing common mode current, especially after you have placed ferrite beads on the devices power cord that is experiencing common mode current. Note - Sometimes resolution is made by simply moving the devices power cord to a different circuit. If, for example, you still hear your own transmission coming from a pair of speakers then we recommend reading the following article: "The Need (or not) for Antenna Baluns or Chokes": https://alphaantenna.com/community/hints-and-kinks/news/the-need-for-antenna-baluns-ensuring-efficient-signal-transmission/

To enhance NVIS, mount the element lower than 8 feet in a horizontal configuration. For better DX, mount the element in the clear and sloped into the direction you want to launch your signal. For example, with one end at 6 feet and the other at 30 feet (Note that higher typically results in more DX). Again, the slope helps determine the angle and direction that your signal is launched.

Previous design: In July 2023 Alpha Antenna changed what was their 5:1 UnUn with a single element as the radiator and one element as the counterpoise.

Current design: The result of this change is an end fed fan dipole arrangement fed to a modified 5 to 1 UnUn.

What changed?: While monitoring with both RigExert and AIM analyzers, physical changes were made in real-time to the inductor with the new configuration of the two wire elements attached. Those analyzers simultaneously monitored all of the bands, while physical changes were made to the inductor. We stopped making changes once the best values were presented. During this process, we found that the shorter leg of the two wire elements also had to be modified to present excellent results. The value of the new UnUn has not been tested, nor do we care to test it, we simply enjoy the results of a finely tuned system.

Comments: To construct the UNUN, specialized tools were built on our 3-D printers. Without these tools, construction of the new UnUn in a production environment was nearly impossible. Fortunately, we use Fusion 360, which made designing the tools possible.

The JPole (Jr & Sr) are derived from a fan dipole’s design, which simply enables RF to select the element(s) with the path of least resistance for the resonance required to provide acceptable SWRs. The second shorter element is an active element that that is attached to the longer element in a zip cord configuration. This enables the end fed JPole antenna to have access to 3 electrical lengths of wire. These lengths are: 1) The shortest element, 2) the longest element, 3) and an even longer combined length of 1 and 2. Then an inductor matches the impedance at the point where your 50-ohm coax attaches to the match. Operationally, the JPole Sr is designed with the optimum lengths of elements, and the 34-foot JPole Jr was designed for those who do not have the room to deploy a 60-foot JPole Sr antenna.