This video details some basics on Hexbeam wire elements. If you want to build this Hexbeam - Video Playlist - • Building the MM0OPX li... Hexbeam Files - drive.google.c... K4KIO Website - www.hex-beam.com/
Thanks so much for this Colin. I have nearly completed mine as per your instructions, and it is looking great. Last thing to do is make the wires, however on your spreadsheet the lengths seem to be different to the recalculated lengths on your sheets in the video. Are the lengths on the spreadsheet your final lengths for the 1mm stainless steel wire?
Very smart spot👌. So the short story is I made the adjustments and remade all the wires. They were roughly 5% out. After doinf this they were slightly too short. The sizes you see in the video are these. I then adjusted circa 2% and added these sizes to the spreadsheet. There are interactions between the wires so the theory doesn't exactly match the practice. Subtract the final video sizes to the spreadsheet sizes and it should be circa 2%. Yes 1mm stainless wire. Please email me some pics when complete 👍
@@MM0OPXFieldRadio Thanks for the quick reply. So, for example on 10m you have 2633mm as your final value for the driven elements (in the paper in your vid), so at 2% longer that would be about 2686mm but in the spreadsheet you have 2817mm. It’s just I have made the 10m elements to the spreadsheet now and the total length is far too long for the suggested spreader arm length and is resonant at something like 26 Mhz (very rough test). Just wondering if those numbers in the spreadsheet are a bit out, or perhaps it is something I have mucked up my end. And yes, I will certainly send you some picks when I am done, this has been a really good build so far.
I'm now doubting myself Matt. The spreadsheet lengths do seem long. The final sizes on the video is what im running. Its not perfect but close enough and not worth charging. I will look at this tonight and change the spreadsheet if need be. There should only be the 1-2% difference. I do apologise if any if you have cut wrong lengths. Remember to check SWR with the beam in the air. Ground has a big effect.
Thanks Collin,I m trying an hexbeam using pvc coated wire of 1 square mm of section.12m and 17m bands show roe>2 , and it increases with power.Do you have any tip for this?Regards
Not a whole lot but its kinda subjective too. I did see more front/back with the Moxon but the Hex still had 20+ db. For practicality/stability the Hex wins too.