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  #31  
Old 11-12-2008, 11:35 AM
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Quote:
Originally Posted by nakman View Post
Also I went to HRO and asked for a 2m only antenna, but they said you can't really get one, pretty much everything off the shelf is dual band these days.
I went through a similar process almost 2 years ago. Details here.

Long story short: I ended up with a 2m only antenna, the Larsen NMO 150-B. The good news is that it's inexpensive. The even better news is that it works great!

I have the Yaesu 7800 as well, but I only use the 2m. I mainly wanted the separation functionality so I could mount the faceplace in a tight space up front and the rest of the radio in the back. Otherwise, I would have bought the Yaesu 2800, which is a great radio that is 2m only.

I did a quick Google search. The Larsen is still available. Here's one place that has it for $30.

HRO sells the Larsen NMO-150CHW, a 2M half wave antenna, for $36.50. This is similar to the 150B in a shorter length (1/2 wave vs. 5/8). My antenna is at the top of page 4.

Here's a link to the Larsen catalog section with their 2M antennas.

Hamcity.com sells a Comet with the fold-over for $40: link.
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  #32  
Old 11-12-2008, 11:44 AM
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Here's the link to Larsen's multiband antennas, if you want to go with a dual-band antenna.
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  #33  
Old 11-12-2008, 12:18 PM
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Thanks for the insights. A few things I'm pulling out of your suggestions:

- Two antennas is a good idea. A "stubby" for the trails, and a tall (1/2 wave) antenna for traveling and local stuff. I assume you have quick disconnects to make it easy to jump back and forth?

- A single band, 2M antenna performs better than a dual-band? I'm mainly interested in the 7800 for the separation feature as well (as opposed to the dual-band), but at the same time it seems counter-intuitive to limit yourself to 2M use only when you could have both.

- No advantage to hood mount over rear bumper mount? I don't know enough about ground planes to know if the hood could act as a ground plane (to some degree) even though the antenna is out on a fender.

Since I'm talking about opposite ends of the rig, trial and error becomes less attractive since I'd have to rerun all the cable. But maybe I'm just splitting hairs here ...
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  #34  
Old 11-12-2008, 12:57 PM
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If you mount it on the rear bumper, will most of the length of the antenna have a parallel metal surface nearby (the back of the truck)? If so, this is not your best location. It will work better mounted on your fender where the fender/hood will act as a ground plane.

As for 2 meter vs. dual band, I'll quote Seldom Seen:

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Originally Posted by Seldom Seen View Post
Not to muddy things up too much, but here is a 3rd option. If the shorty performs well on 2 & 70, skip the longer dual band all together and get an ant optimized for 2meter for backcountry use. Something like a 5/8 wave Larson MNO150. Dual band antennas are always going to be a compromise so having a dedicated 2meter for out in the bush, where you may need to reach way out and touch some one, might come in handy.
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  #35  
Old 11-12-2008, 02:37 PM
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Quote:
Originally Posted by Jacket View Post
I assume you have quick disconnects to make it easy to jump back and forth?

-...
i run nmo mounts on mine. it's screw mount, but a wide thread so it unthreads/threads on real quick. i swap my antenna and radio rig to rig. i just have coax/ant mount and wiring harness for the radio that are permanent on the rigs.
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  #36  
Old 11-12-2008, 03:32 PM
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I'd also point out that after having my antenna mounted on the edge of the hood for 1.5 years, the bend in the coax was so tight that it ultimately crimped the cable and stopped working. It turns out on an 80 (that is what this thread's about, right? ) there can be a much gentler curve to the coax when mounted in the rear hatch. So be mindful of your routing, and what kind of stresses the really skinny portion of the coax is going to see over time.
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  #37  
Old 11-13-2008, 08:36 AM
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Quote:
Originally Posted by Hulk View Post
If you mount it on the rear bumper, will most of the length of the antenna have a parallel metal surface nearby (the back of the truck)? If so, this is not your best location. It will work better mounted on your fender where the fender/hood will act as a ground plane.
I wondered about this too. Since its a pickup, I've got a lower profile than a wagon, but it's still probably 18-24" or so up from the bumper to the top of the bed. So for a 36"+ antenna, maybe I'd be fine, but a stubby would probably have some issues. Maybe I wouldn't need a stubby...

By the by - KDFQQ as of last week
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  #38  
Old 11-13-2008, 09:25 AM
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By the by - KDFQQ as of last week
Congratulations!


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  #39  
Old 11-13-2008, 09:36 AM
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Congratulations!


Very Cool Matt! If you want to play with my VX-7 for a while your welcome to it! I'm not using it very often.
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  #40  
Old 11-14-2008, 09:54 AM
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Does anyone know what Bruce is talking about here:

Quote:
Originally Posted by Bruce Miller
I hate to see any antenna mounted to the swing out tire thing or the rear bumper where the antenna is behind the truck. That's like transmitting inside a tunnel.
But in the attachment, I see a rear bumper mount.
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