A while ago I continued the 3BMOX overhaul. As you can see on the photo I mounted everything according the user manual. Some bolts/nuts were missing and had to make new ones. So far it was not too difficult. Resonance on the 20m a bit on the high side, resonable on 15m but very bad on 10m. I really doubted I did mount something wrong. But measured everything and it everything was mounted exactly the way it should.
Here some measurements:
My opinion about this antenna is that it is build well except the clamps material that isolates the elements from the boom. I'm not shure what material is used but I think it is POM. From what I heard is that white POM is not UV resistant, the black variation is. This material is also called Delrin, although I think that is a brand name. Personally I stick with Stauff clamps (PP material) when building antennas. The 20m moxon itself is a bit flimsy. I really am not shure what windforce this antenna can have... but that would be another story.
The 10m SWR is a bit suspicious. All the antennas I ever build had good SWR also near to the ground, only the resonance would shift after raising the antenna. However, this is a multiband antenna with sleeve fed dipoles on 15m and 10m. It could be working different from what I am used to.
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Thanks for your comment. Bedankt voor je reactie. 73, Bas