New VHF Yagi Antenna insulator

Expands the capabilities of the previous model

Primarily created for the 12 element 2 meter OWA antenna from G0KSC - .stl files are generated for this version of the antenna

Description of the main design features

• the width of the mounting insulator is the same as the width of the boom, therefore there will be no electrical elongation of the element due to the shortening factor in the plastic
• the lateral extension guarantees the perpendicularity of the element to the boom even when using one mounting screw
• the mounting screw fulfills two functions - the attachment of the insulator and the mechanical clamping of the element, for which a distance gap of 1/10 the diameter of the element is used
• the mounting screw should have an Allen head inside the boom so that it does not deform the boom when pulled
• the isolation distance between the element and the boom, and between the element and the mounting screw is given by the IsolationDistance parameter
• a fixed distance (IsolationDistance) between the mounting screw and the element allows you to drill holes in the boom according to the dimensional design of the antenna - after mounting the element, all elements will shift and the design will be preserved
• the inner hole for attaching the element contains lamellas for a better distribution of forces
• descriptions of the diameter of the screw and boom facilitate orientation
• the BoomProfile parameter allows you to choose between a circular and a square boom profile
• the MoutScrewNut parameter enables the use of screw nuts to be turned off - in this case, a conical hole will be created for screwing directly into the plastic
• the design includes spacers for attaching a second support boom, always with one screw. Which is used for long antennas that bend under their own weight
• the design includes two types of mounting elements for the boom to mast, depending on whether it is a single antenna boom or a double boom with a support

Recommendations for printing

• lateral orientation on the pad prevents breakage during tightening
• necessary use of supports
• use PETG material due to its UV resistance and flexibility
• set the outer perimeters of the print to the value 4
• infill value >30%

Have fun!