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7/8 wave 2 meter mobile

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Old 01-07-2010, 07:01 PM
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Default 7/8 wave 2 meter mobile


who makes it and what is it, a 7/8 wave antenna for 2m (and 440?) I suspect its a 5/8 wave over 1/4 wave. I have been told this would be a better mobile antenna than a 5/8.


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Old 01-07-2010, 09:32 PM
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towerdog, if you mean the 7/8wave shuntfed whips that look like an old smc oscar foldover cb antenna i cant remember who made them, i have seen them with different brandnames on the same antenna,
they are a 7/8wave single element antenna,
i tried a ham buddies 7/8wave that he raved about against my identical looking but shorter 5/8wave and got more flutter on my mobile signal with the 7/8wave,

if you mean a 5/8wave over 1/4wave colinear thats a different ballgame, the radiation angle can be manipulated by the designer to give a lower or higher radiation angle and higher gain than a single element antenna at the expense of vertical beamwidth, the result may or may not suite your mobile needs
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Old 01-08-2010, 04:37 AM
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Not sure about 7/8 but Hustler makes what I believe is a colinear 5/8 (two 5/8's put together one of top of the other) Any Hustler dealer should have them. Ham Radio Outlet sells them.

The 3/8 x 24 threaded is model # CG-144

Trunk Lid Mount is # CGT-144

I've used one in the past. Work well. Best if you can locate in the free and clear.

Good luck

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Old 01-08-2010, 04:48 AM
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MFJ Enterprises Inc.

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Old 01-08-2010, 07:08 AM
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Quote:
Originally Posted by IMD262 View Post
thats it! what I was looking for, thanks. I beleve flutter can be caused by the whip whipping around too much in the wind, I heard you might have radiation pattern issues from insufficient ground plane from a 7/8 also but I will read up on it, and check the reviews out.

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Not sure about 7/8 but Hustler makes what I believe is a colinear 5/8 (two 5/8's put together one of top of the other) Any Hustler dealer should have them. Ham Radio Outlet sells them.

The 3/8 x 24 threaded is model # CG-144

Trunk Lid Mount is # CGT-144

I've used one in the past. Work well. Best if you can locate in the free and clear.

Good luck
thats model, CG-144 is a 5/8 over a 1/4. I cant find a colinear for mobile but did find this stacked 5/8 colinear for base application. Base Model G7-144 with 7dB gain. If that 7dB is true, thats more than some directional antenna, pretty cool, I might try to build such a thing. Is co-linear the same as co-phased?

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Old 01-08-2010, 07:39 AM
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Keep in mind, the more gain, the 'flatter' the radiation pattern gets....it gets narrow as a razor. On flat, open ground or slight elevation advantage, this can be great. In varied terrain with rolling hills and buildings, this can actually hurt you vs a much higher angle of radiation on a no or low gain antenna.

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Old 01-08-2010, 08:02 AM
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I and two friends both tried the Hustler 144 and never got performance as good as the base loaded 5/8 in test after test. Mine is relegated to the storage room.

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Old 01-08-2010, 01:20 PM
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Quote:
Originally Posted by SR385 View Post
Keep in mind, the more gain, the 'flatter' the radiation pattern gets....it gets narrow as a razor. On flat, open ground or slight elevation advantage, this can be great. In varied terrain with rolling hills and buildings, this can actually hurt you vs a much higher angle of radiation on a no or low gain antenna.

EXACTLY! Gain is not everything. I used to run a Diamond SG-2000HD antenna which is also a 7/8 wave. It was great for simplex mobile-mobile but was almost always beaten by a simple 1/2 or even 1/4 wave antenna when working repeaters high on the hilltops from the valley floor. I later switched to a Comet CA-2X4SR because of that and also the need for wider bandwidth. For somewhere on the great plains a 7/8 wave antenna is great. As for the "picket fencing" , or flutter, I actually had less with the 7/8 wave antenna then any other type.
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