The CX-333 is two sections - about twice the height - and about twice the price. It's your preference.
I find the two section or more antennas encounter weather problems. The taller you go you certainly get more gain overall but the beam becomes much more narrow like a tight searchlight. The smaller GP-3 is manageable to mount at just under six feet. It has a broader beam to manage filling coverage holes due to terrain. It's at a price point good for average users.
The CX-333 is a mighty antenna but it costs as much as a basic mobile rig. If you want penetrating gain you could also try a Arrow 4 element Yagi and a rotor. It has a fairly tight nose and it is very effective and directional. An omni wastes power radiating eveywhere instead of concentrating on your target. I just had a ?700 mile QSO with my 4 element mounted indoors!?
The reason that all these models are offered is that everyone has different personal goals and preferences. I suggested the GP-3 as a good basic antenna for a beginner and not for a all guns drawn contester.
Respectfully offered.... ? Karl ?N2KZ
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On Oct 31, 2023, at 5:30 PM, Chris Smart <ve3rwj@...> wrote:
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Actually, I think the right Comet vhf/uhf vertical is the CX-333.
Decent amount of gain and a nice pattern on 2M, 1.25M, and 70CM, and it can handle 100 W on all three.
Perfect for the ARRL VHF contest FM-only category.
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