2m/70cm Copper Pipe J-Pole Antenna Construction Spacer

prusaprinters

These 3d printed spacers make building this dual band copper pipe jpole much easier as explained in the youtube video for this project:  The dual JPole itself is amazingly broad band, easy to tune and has a nice low angle radiation pattern on both the 2 meter and 440 MHz bands. Don't be misled by the picture above, that is BEFORE optimization using the free antenna modelling program MMANA-GAL_basic. If you wish to replicate the final optimized values, cut and paste the following code into the antenna definition edit tab of the software.Dual Band Copper Pipe J-Pole with Stub Element * 446.0 ***Wires*** 11 0.0, 0.0, 0.0, 0.0, 0.0, 0.513, 0.00635, -1 0.0, 0.0, 0.0, 0.0, 0.0, -0.044, 0.00635, -1 0.0, 0.0, -0.044, 0.0, 0.049, -0.044, 0.00635, -1 0.0, 0.049, -0.044, 0.0, 0.049, 0.0, 0.00635, -1 0.0, 0.049, 0.0, 0.0, 0.049, 0.469, 0.00635, -1 0.0, 0.0, 0.0, 0.0, 0.049, 0.0, 0.00635, -1 0.0, 0.0, 0.513, 0.0, 0.0, 0.773, 0.00635, -1 0.0, 0.0, 0.773, 0.0, 0.0, 0.983, 0.00635, -1 0.0, 0.0, 0.983, 0.0, -0.049, 0.983, 0.00635, -1 0.0, -0.049, 0.845, 0.0, -0.049, 0.983, 0.00635, -1 0.0, 0.0, 0.983, 0.0, 0.0, 1.374, 0.00635, -1 ***Source*** 1, 0 w6c, 0.0, 1.0 ***Load*** 0, 1 ***Segmentation*** 400, 40, 2.0, 2 ***G/H/M/R/AzEl/X*** 2, 7.0, 2, 50.0, 120, 60, 0.0This process involves soldering copper pipes together so be prepared for some serious investments in both equipment and safe practicing to get it right. I hope you agree that the end result is worth the effort. 73 and I hope you have as much fun with this as we have, Sandy KB3EOF