so ive been doing a lot of portable VHF operating lately, mostly 2m and 70cm, usually just driving up to a local hilltop and running simplex or hitting a few linked repeaters. right now i have a diamond X50 on a pole strapped to a fence post or whatever i can find and its fine but i keep thinking about whether a yagi would actually be worth it for what im doing.

the thing is i dont really have a single direction i care about — its more like i want to cover a wide area around me, so an omni makes sense in theory. but ive had situations where some guy is like 40 miles out and barely making it through and i think well if i had even a 5 element yagi pointed at him itd be a done deal. then again id have to rotate it manually which gets annoying.

anyone done both and have an opinion? is there a middle ground or am i just overthinking this. also curious whether a colinear longer than the X50 would actually give me noticably more than what i have or if im already pretty close to the point of diminishing returns on gain with an omni

honest answer — it really depends on what you mean by 'covering the area.' if youre mostly doing local ragchews on repeaters then the X50 or anything similar is probably fine and a yagi is overkill. but if you get into any kind of weak signal work or even just trying to chase gridsquares from a hilltop the yagi wins every time, no contest. the difference between 0dBd omni gain and even a modest 7 element on 2m is not subtle, especially when things start getting marginal.

i do portable ops sometimes with a 9 element M2 on a camera tripod and just point it by hand — its not as annoying as it sounds once you get used to it. you figure out pretty quick where the signals are coming from and most of the time youre not rotating it every two minutes. the tradeoff for that gain is absolutely worth it IMO if youre doing any kind of distance work.

for pure repeater coverage though, honestly just get a longer collinear. the X50 is decent but something like a GP-9 or the diamond X300 gives you a bit more and youll probably notice it on marginal paths. just make sure your coax is halfway decent or you'll give back whatever you gained

i ran into the exact same question last summer and ended up just bringing both. sounds like overkill but its really not — the collinear stays on the pole for general use and the yagi comes out when someone is being difficult. takes maybe 2 minutes to swap. the yagi i use is a homemade 5el for 2m, nothing fancy, built off one of the free online calculators and it works great.

the diminishing returns thing on omnis is real though. going from a rubber duck to a half wave is huge. going from a half wave to a 5/8 is noticeable. going from a 5/8 to a longer collinear is... ehh. you get a bit but youre also starting to compress the radiation pattern vertically which can bite you on uneven terrain