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As Marconi said, I have had to adjust the lengths to get the real world results spot on. It may be noted, however, that the wide banded nature of the antenna will produce great results for anyone using MoxGen without sweeping it with an analyzer.

I have built 4 of the Moxons - two wire and two tubing. In every case the MoxGen measurements produce a slightly long driven element that set resonance lower than I wanted. I simply shortened the driven element in each case to bring it up to where I operated. The value of Moxgen is the same as with all antenna calculators, it gets you started very closely to where you need to be. I have never built any antenna using any software that did not need to be fine tuned.
Not using the MoxGen tool can be a matter of too many guess work variables. There are numerous essential dimensions to be considered, not the least of them the end spacings between the two elements.

I never readjusted the length for the reflector. The antenna always worked well, and resonance followed the adjustments to the driven wire or tube lengths adjusting only the driven element.

One might do as has been suggesteed and put in a center frequency about 1 Mhz higher than desired and build it. Please note that the antenna parts will need to be adjustable in the event the antenna is still short of the mark. In other words, don't cut the wires or tubing in a permanent way before checking the antennas SWR and resonance.

<blockquote data-quote="HomerBB" data-source="post: 480855" data-attributes="member: 8569">As Marconi said, I have had to adjust the lengths to get the real world results spot on. It may be noted, however, that the wide banded nature of the antenna will produce great results for anyone using MoxGen without sweeping it with an analyzer.I have built 4 of the Moxons - two wire and two tubing. In every case the MoxGen measurements produce a slightly long driven element that set resonance lower than I wanted. I simply shortened the driven element in each case to bring it up to where I operated.&nbsp; The value of Moxgen is the same as with all antenna calculators, it gets you started very closely to where you need to be. I have never built any antenna using any software that did not need to be fine tuned. Not using the MoxGen tool can be a matter of too many guess work variables. There are numerous essential dimensions to be considered, not the least of them the end spacings between the two elements. I never readjusted the length for the reflector. The antenna always worked well, and resonance followed the adjustments to the driven wire or tube lengths adjusting only the driven element. One might do as has been suggesteed and put in a center frequency about 1 Mhz higher than desired and build it. Please note that the antenna parts will need to be adjustable in the event the antenna is still short of the mark. In other words, don&#039;t cut the wires or tubing in a permanent way before checking the antennas SWR and resonance.</blockquote>

[QUOTE="HomerBB, post: 480855, member: 8569"] As Marconi said, I have had to adjust the lengths to get the real world results spot on. It may be noted, however, that the wide banded nature of the antenna will produce great results for anyone using MoxGen without sweeping it with an analyzer. I have built 4 of the Moxons - two wire and two tubing. In every case the MoxGen measurements produce a slightly long driven element that set resonance lower than I wanted. I simply shortened the driven element in each case to bring it up to where I operated. The value of Moxgen is the same as with all antenna calculators, it gets you started very closely to where you need to be. I have never built any antenna using any software that did not need to be fine tuned. Not using the MoxGen tool can be a matter of too many guess work variables. There are numerous essential dimensions to be considered, not the least of them the end spacings between the two elements. I never readjusted the length for the reflector. The antenna always worked well, and resonance followed the adjustments to the driven wire or tube lengths adjusting only the driven element. One might do as has been suggesteed and put in a center frequency about 1 Mhz higher than desired and build it. Please note that the antenna parts will need to be adjustable in the event the antenna is still short of the mark. In other words, don't cut the wires or tubing in a permanent way before checking the antennas SWR and resonance. [/QUOTE]

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