
Simple Dipole Centerpiece for Single/Dual band radio Antenna
thingiverse
EDIT 1 27/09/19: Added Two Band Centerpiece. Planning to use both 2m and 70cm bands makes this useful. Also added grooves to secure the cable with zipties. Using holes at the back to screw a Pipe Clamp to fix it to a pole made out of 3/4" pvc pipe. The elements are 3/8" aluminium rods, meant to fit tight on the holes. If too loose, glue it; if too tight, sand it, but should fit nice and tight right out of the print bed. ------------------------------------------------------------------- After having a horrible idea about a dipole centerpiece, came up with this much simpler design that works great. 50 minutes of printing, 5 minutes of assembly, ready to go. My last try was this huge and horrible triangle shaped thing: https://www.thingiverse.com/thing:2992947 DON'T WASTE YOUR TIME! Tested about 1 meter above ground with 10m of rgc58 cable, gave me excellent results, 1.2SWR at 147MHz. Dipole antenna box (center piece) for 2m band (or whatever you want). Designed it to use 8mm rods initially but could only find 3/8" rods in my local store, so modified the files to use 3/8" rods for the elements. Very tight, need to sand a little bit to fit. For connecting elements to cable drilled a hole and passed cables through, then pulled rods until cables were secure. Use your imagination to find a better way to connect elements. Used metal tube clamp to attach antenna to pole, used 3/4 inch PVC pipe as pole. Amateur design, novice to ham radio and antennas, so maybe something is off, be gentle. Suggestions are welcome. Materials needed ---------------------- 2x 3/8" aluminium/copper/stainless steel rods/tubes between 49 and 51 cm long each (for 2m band, tune it at your taste) 50ohm Coax Cable (mine is rgc58) 3/4 pvc pipes 3/4 tube metal clamp Solder, soldering iron, pliers, tape, and all that diy stuff...
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