Servo Magazine Issue worth buying and/or reading plus back to work on the telescoping yagi

Finally got around to working on the telescoping yagi that I think the spreadsheet I had was on the computer(s) in the mobile office Ford F150 that was stolen in Utah. I think I wrapped up the min and max specifications with the different telescopic antennas I have related to the min and max boom specifications.  I also decided to make an adjustable "U" matching network element or "hairpin" and need to buy two nylon 10-24 1/2" thumb screws.  I think that will take care of everything other than the modification of the antennas where I need to drill out a little larger for 6-32 or equivalent wood/sheet metal screws as well as the reflector antenna trimming down about 3/8" I'm thinking... though might not be critical since a receive antenna only.  Then again, I want to maintain the director, driven and reflector element ratios for optimal performance in the the ~440MHz range max Hz with a calculated new ~110MHz min Hz.


I've been working on recreating the spreadsheet and will post... though looks like I can't upload unless I create into and image that can be renamed.  I'll look into that next.

Here is the Servo Magazine worth reading into regarding radio/audio direction finding.  I was going to crop out the wideband spiral conical antenna for ISM WiFi with ground plane and impedance matching piece... though figured I'd show. 









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