I am not familiar with MMANA but this is quite easy to model using EZNEC. There is no need to model your exact tubing diameters, certainly there must be a dipole example that you can alter. I doubt t
You might consider these as a two band fan dipole fed at a common point. If the tip of the 30m was 24 to 30" from the 40m that reduces the interaction, but modeling is still advised. Make a mast/ante
I've recently made something similar. From parts of an old KLM 4 element 20m monoband yagi with half an element missing and no need for a monoband antenna I refurbished 3 of the very tatty elements a
Initially, nothing but 40/30 will be on the mast. At a later date I plan to add some UHF yagis but the booms will be at right angles to the 40/30. I expect little to no interaction with those. I will
4NEC2 is free :-( Several hundred segments, built in optimiser Martin, HS0ZED I will try EZNEC but am limited to 20 segments. Perhaps 10 segments per dipole will be enough for the case of two separat
To check for interaction, you can model the dipoles as single wires fed in the middle and let it auto segment. I am guessing 5' apart on the mast will be fine. John KK9A Initially, nothing but 40/30