Tico

WSBR383, I found some issues with my antenna and fixed them with the help of Dr. Ed. I am now at 1.1 VSWR. I did try the Nagoya mount you mentioned; however, the radials are very flimsy and unbalanced. With a little wind, they bounce, which affects the effectiveness of the ground plane.

I am using a nanoVNA and a Surecom SW-102. Over the weekend, I dismantled the entire system. I am currently waiting for some parts. I will verify the readings using an Agilent Spectrum Analyzer. My antenna was mounted on a metal pole, whereas yours appears to be on a PVC pole. This difference "might" affect resonance at the base of the antenna as well. I will conduct further tests. Thank you for sharing the information.

I have Ed's Antenna for GMRS (+5db) and I am very happy with it as well, however I have 1.6 VSWR at Repeater input frequency (467.xxx). I am using 25' of LMR-400. What mount are you using for the Comet SB-790A? how far is each antenna? Also, I would like to know the loss in the switch if you have already measure it.

WSBR383, The Comet CA-2X4SR with a base for a ground plane seems like it would be perfect for your situation, as it requires only one feed line and one antenna for HAM and GMRS.

Someone mention about this issue when one radio is using wide band and the other narrow band check it out and let us know.

Regular GMRS applications, Simplex car-to-car and Duplex car-to-RPT. I agree with the antenna part, but based on real-world tests, there isn't much you can do to improve propagation from a car antena in 460 MHz (being very close to the ground). If anyone has conducted tests with different results, please let us know.

Considering a Wouxun GMRS radio, is there a noticeable difference in real-world car range between the 20W and 50W models?

For future readers like me: Everything explained here is indeed very accurate. Antenna manufacturers often do not provide proper data sheets or certifications to back up their claims. Some numbers, like dB, are sometimes altered for marketing purposes. An easy way to understand dB is through a water analogy: High dB is like a water pipe with a pressure nozzle - it reaches a longer distance but with less flow. Low dB is like a water pipe without a nozzle - it delivers a lot of water, but at a closer distance.