Could I again extol the virtues of 2 stacked HB9CV aerials for 2m ssb/cw on mountain tops. One aerial gives about 6dBd gain, Two stacked, at the correct stacking distance, gives a total of 9dBd. A power splitter is of course needed. I use RG213 feeder and N plugs up to the power splitter then RG58 and N plugs between the splitter and the feed points. The aerials deliver gain by squeezing the vertical illumination onto the horizon whilst leaving the azimuth unaffected.
The advantages over a long Yagi are:
Low wind profile
Low inertia and bending moment on the mast
Valuable gain
Wide horizontal beam width, so less fussy beam heading.
Is more easily elevated higher than a long Yagi
Rucksack portable
Regards
David
G0EVV