Well I've had my V4 for a little less than a week but I'm pleasantly surprised by it's simplicity and performance.

The V4 is mounted to the left side of my FT-817 on an "L"  bracket with a short pigtail going from the base of the V4 to the front of 817 and from all the testing that I have done it performs quite well! It is not recommended that you mount the V4 directly to the 817's connector, it won't handle the motion of moving back and forth and could fatigue crack the BNC.

On 6 meters the S.W.R. is 1.2:1 on 50.125 and doesn't vary much on the low end of the band. On 10 meters the S.W.R. is 1.2:1 on 28.400 with little variation, and on 15 meters it was 1.3:1 on 21.400. 17 meters is 1.5:1, the counterpoise I am using is a spiral ground plane inside my backpack with a pigtail going from the 817 to a banana jack in the center of the counterpoise.

No tuner, no additional tuning! Not the best ground system,  however I worked 6 meters with a distance of 12 miles and 2 watts with the V4 and a quick change from my standard 55" whip to the V4 showed a noticeable gain on this band. You can hear the difference in performance when you add a ground which is essential, you can use the antenna without a ground but with my system it works well.

10 meters while pedestrian mobile I worked into the midwest with 2 watts, walking in hilly terrain. Band conditions? Perhaps, but the second base loaded 10 meter vertical did not perform well at all and switched back to the V4, they heard my CQ and had good reports.

I hope to add some photos (perhaps Carl can put the photos up) of the installation of the V4 on the side of the 817 to show how it was done.

After looking at my other options and the way this antenna performs and looks on the 817 I am glad to say that I would get another and am pleased that Chameleon came out with this design, no tuning, no hastle, looks good, you would think that it was made for the radio, what else is there?

Glenn, VA7VO