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

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,	0.0

This 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