Antenna issues

[blueangel-eric]

Hey guys....

Some VERY helpful info you have provided!

I've also been in touch with one of the engineers @ Larsen. I tested the resistance between the mounts and the body of the vehicle; I got about 38 Ohms, and he says I should be getting under 1 Ohm. In other words, there is no ground plane. His suggestion (shy of drilling 6 holes in the roof) is to fender mount them. Larsen makes a high freq NMO mount that is identical to the regular NMO mounts, but the wiring is completely enclosed. He suggests that if/when I move everything to the fender that I replace the cable assemblies/mounts with these enclosed mounts.

Thoughts?

what about the rust or corrosion? wouldn't that make resistance too?

 

[yorkphotog]

According to the guy I've been speaking to at Larsen, the rust under the mounts is no big deal. He suggests I remount all of the antennas to the fender of the truck using NMO high frequency mounts. The design of the HF mounts is what's different -- the wiring is completely enclosed, so exposure to weather is no big deal. The 38 Ohm resistance basically says there is currently zip for a ground plane. Opinions?