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Author: JamesJames Date: Jan 4, 2008 14:08
I plan to install a 2 meter radio in my 1980 CJ5 Jeep (softtop). My plan
is to construct a mount that will attach to my rear tire mount. Because
this will be a custom mount, I can have the base of the antenna even with
the top of the spare tire, or I can elevate it some for greater height. I
use this Jeep only in mountain areas. Here are some of my questions:
1. What is the "best" 2 meter antenna type for me (I don't need a dual
bander. I will only use 2 meters). I know that a 5/8 whip will have
the best gain, but I have seen some comments that a 1/4 wave may work better
in the mountains, because of the angles involved. Yet, I know that a 1/4
wave needs a good ground plane, which a softop probably will not do very
well. It would seem that with a 1/4 wave, I would want the base of the
antenna at or near the top of the Jeep. I am also aware of a colinear
antenna, but that would be quite tall for me !!
2. Is it best to have the antenna element fully above the top of the top of
the Jeep ?
3. If I use a spring to offer some protection for the whip, doesn't the
spring add to the length of the antenna, and I would have to tune the whip
for resonance ?
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Author: JamesJames Date: Jan 5, 2008 06:18
Thanks for all the great replies here guys !! Very good points made by all
!!
73 de Jim K4PYT
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Date: Jan 5, 2008 06:30
If you haven't committed to one design yet, you might look around for
or fabricate a tail light mount. Basically, the ones I;ve seen unbolt
the tail light, and are a stainless steel plate that has the same hole
patern as the bolts that secure the light. on top is a flap that is
bent forward drilled for the antenna mount. Advantages are, you don't
have to mess with it to change tires, it doesn't move to open the
tailgate (no extra coax to be stuffed somewhere), and if you put it on
the driver's side, it is very unlikely to be in you field of view on a
regular basis. As for sepcific antennas, I'd go for an inexpensive one
as long as reasonable.
Scott
N2WMD
On Fri, 4 Jan 2008 17:08:10 -0500, "James" nospamfdn.com>
wrote:
>I plan to install a 2 meter radio in my 1980 CJ5 Jeep (softtop). My plan
>is to construct a mount that will attach to my rear tire mount. Because
>this will be a custom mount, I can have the base...
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Author: PeterDPeterD Date: Jan 5, 2008 06:48
On Fri, 4 Jan 2008 17:08:10 -0500, "James" nospamfdn.com>
wrote:
>I plan to install a 2 meter radio in my 1980 CJ5 Jeep (softtop). My plan
>is to construct a mount that will attach to my rear tire mount. Because
>this will be a custom mount, I can have the base of the antenna even with
>the top of the spare tire, or I can elevate it some for greater height. I
>use this Jeep only in mountain areas. Here are some of my questions:
>
>1. What is the "best" 2 meter antenna type for me (I don't need a dual
>bander. I will only use 2 meters).
Whatever one you want...
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Author: JamesJames Date: Jan 5, 2008 08:51
Is this your usual wise-ass contribution to usergroups, PeterD ??
James
-------------------------------------
You are a Ham, you should know all about antennas.
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Author: PeterDPeterD Date: Jan 5, 2008 11:22
On Sat, 5 Jan 2008 11:51:20 -0500, "James" nospamfdn.com>
wrote:
>Is this your usual wise-ass contribution to usergroups, PeterD ??
>
>James
>-------------------------------------
>You are a Ham, you should know all about antennas.
>
>
Yes, it is...
Any ham who goes to the Jeep group for a 2M antenna advice is not
doing very well at all... And, if you actually read my post I did give
him some advice that was significant, and as to my parting comment, I
stand by it... Except in your case, please delete the since you
clearly don't have a clue...
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