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Old 11-02-2012, 01:09 AM   #826
williaty
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Originally Posted by ThirteenFlights View Post
Ah, good to know. I'll be scratching that off the list then
This thread is great though, I've learned a lot. Thanks for all the info
The other half of that is that if everyone in your group is doing it, it might work because at least you'd all be polarized the same, but I'm pretty sure the interaction between the car and antenna is still going to basically ruin everything.
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Old 11-02-2012, 03:43 PM   #827
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Alrighty, another question. I ordered the Larsen NMO-27B, and I've got some cheap Cobra radio in the car already.
How do I go about tuning the antenna? I don't really understand what to do there.
Also, if I upgrade the radio later, is it going to mess up the tune? (Pretty sure the answer to that is yes, so if it is I may upgrade the radio now and then tune.)
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Old 11-02-2012, 04:43 PM   #828
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1) You'll need an SWR meter to adjust the antenna. You can get them at Radio Shack in most places. Truck stops usually have them. Otherwise, order one from a ham store like Universal Radio. You need one that covers CB/28MHz/11m (all the same thing).

2) There's descriptions online of how to use the SWR meter to cut the antenna down to the correct length. Quite a bit has to come off the 27B, but TAKE IT SLOW. Once you've cut it off, you can't add it back. Also, they're serious when they say you have to make the measurement well away from any metal objects. Talking hundreds of feet.

3) Radio upgrade will not change antenna tuning. What will change antenna tuning is any small change in where you place it on the roof or any change at all with what you have on the roof.
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Old 11-24-2012, 10:54 PM   #829
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Quote:
Originally Posted by ThirteenFlights
Alrighty, another question. I ordered the Larsen NMO-27B, and I've got some cheap Cobra radio in the car already.
How do I go about tuning the antenna? I don't really understand what to do there.
Also, if I upgrade the radio later, is it going to mess up the tune? (Pretty sure the answer to that is yes, so if it is I may upgrade the radio now and then tune.)
High end radios have tuning capabilities. Amplifiers and whole bunch of crap. Most important hands down written in stone is have power from battery and have a perfect ground if not multiple.
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Old 12-05-2012, 01:42 PM   #830
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So I got a couple of different mounts to try out different set ups and see what works for me and looks the best. Here's the one I set up the other day against popular demand on my roof rack...






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Old 12-05-2012, 02:37 PM   #831
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I like it! Looks solid & the red fits in with the theme of the red/black.

Great Job!
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Old 12-05-2012, 03:27 PM   #832
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Quote:
Originally Posted by hoffmanEstates View Post
High end radios have tuning capabilities. Amplifiers and whole bunch of crap. Most important hands down written in stone is have power from battery and have a perfect ground if not multiple.
As far as the RF output section is concerned, a CB is a CB is a CB, regardless of how cheap or expensive it is. They all have the same federally-regulated 4W output and no output-side adjustments. Power amplifiers are a legal no-no.
Now ham gear, that's a totally different story.
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Old 12-05-2012, 04:12 PM   #833
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Originally Posted by HoboBob View Post
So I got a couple of different mounts to try out different set ups and see what works for me and looks the best. Here's the one I set up the other day against popular demand on my roof rack...
Yep, that's a craptastic way to mount an antenna.
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Old 12-28-2012, 04:45 PM   #834
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Just got a Wilson 1000 with magnetic mount and it works great. Really clear and awesome range.
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Old 12-28-2012, 08:25 PM   #835
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Originally Posted by 08OBS View Post
Just got a Wilson 1000 with magnetic mount and it works great. Really clear and awesome range.
Excellent antenna - congrats. I have one myself & have made contacts all over the world with it on sideband. I ended up cutting off the little pigtail and soldering on a straight pl-259, though.
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Old 02-08-2013, 06:20 PM   #836
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williaty Is there a big downside to using a through the roof PL-259 mount? Only reason I ask is all of my antennas are SO-239. And if there is is it better to install an NMO mount and use an NMO-PL-259 adapter or just go with the PL-259 mount and save yourself the losses in the adapter?

(I think I may have my SO-239 and PL-259 reversed but what ever you get the idea)
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Old 02-08-2013, 06:27 PM   #837
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Ty... you need to start your own website. For example,



Your welcome.
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Old 02-08-2013, 06:35 PM   #838
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Originally Posted by flimflamman View Post
Ty... you need to start your own website. For example,



Your welcome.
The domain isn't taken he should get on that. I bet Danica Patrick and Go Daddy would sell it to him for a dollar or what ever it is they do.
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Old 02-08-2013, 07:08 PM   #839
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Originally Posted by Spanktracula View Post
williaty Is there a big downside to using a through the roof PL-259 mount? Only reason I ask is all of my antennas are SO-239. And if there is is it better to install an NMO mount and use an NMO-PL-259 adapter or just go with the PL-259 mount and save yourself the losses in the adapter?

(I think I may have my SO-239 and PL-259 reversed but what ever you get the idea)
Yeah, you probably have it backwards, but weirder things happen in antenna land.

I wouldn't call it a downside to that setup so much as a overwhelming upside to using an NMO mount. With the setup you have now, you're going to be very limited in terms of what different kinds of antennas are available for it. If you have what you need and you're sure you'll never need anything else, that's not a big deal. However, there's a HUGE selection of many hundreds of different antennas available for an NMO mount. Using an NMO mount now for your CB antenna means in the future it could become a GPS antenna, cell booster antenna, ham antenna, etc.




Quote:
Originally Posted by flimflamman View Post
Ty... you need to start your own website. For example,



Your welcome.
That's pretty funny.


Wait... you're saying NASIOC isn't mine?








(I kid, I kid!)
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Old 02-08-2013, 10:34 PM   #840
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I thought you might get a chuckle out of that.
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Old 02-08-2013, 11:08 PM   #841
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I probably should have clarified I was talking in terms of ham radio stuff. I like my MFJ ruff rider antenna and I'm unlikely to change it unless there's a huge advantage of some type. So nmo/so-239 performance wise are about the same?
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Old 02-08-2013, 11:57 PM   #842
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Yeah the connection doesn't make much difference, just what's available to fit it.
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Old 02-26-2013, 12:25 AM   #843
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Hey guys, long time no see. So I'm taking my first amateur radio exam in a few weeks (wish me luck) so I'm real new to all of it. I know a bunch of you guys are hams so I got a few questions that you guys might can help me with.
  • First of all, what's a good meter to get into? I understand 2 meter is pretty popular, is that a good one to learn on/play with?
  • And how should I set up a mobile in the car? I'll probably go NMO with the antenna mount, should I drill it or just put it in a bracket? (Is ground plane and all that as important on ham as it is with cb?)
  • If I do go 2 meter, what's a good first radio? My budget is pretty tight right now, and I've heard pretty good things about Yaesu, any thoughts?
If there's anything I've completely overlooked/misunderstood please feel free to call me stupid I'm new to all this so I've got a lot to learn.
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Old 02-26-2013, 12:33 AM   #844
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Originally Posted by ThirteenFlights View Post
[*]First of all, what's a good meter to get into? I understand 2 meter is pretty popular, is that a good one to learn on/play with?
2m will probably be the most active band that your Tech license will allow you to use. 70cm is also pretty active in most metro areas. Conveniently, most radios are 2m/70cm combos

Quote:
[*]And how should I set up a mobile in the car? I'll probably go NMO with the antenna mount, should I drill it or just put it in a bracket? (Is ground plane and all that as important on ham as it is with cb?)
Drill a hole for NMO, bracket mounts suck.

Quote:
[*]If I do go 2 meter, what's a good first radio? My budget is pretty tight right now, and I've heard pretty good things about Yaesu, any thoughts?
For a first radio, don't skimp on the budget. One of the most important things for a first radio is that it does everything you might need it to do and it does them easily. My suggestion would be to get the Kenwood TM-V71A as it does pretty much everything you might want as a new ham and, more importantly, it's the easiest radio to learn and understand I've ever played with. It's a little more money, but I really feel it's enough of a nice radio and easy enough to use that it'll be worth the extra month or two of savings to get it compared to a entry level model from Yaesu or Icom.


Wiring and antenna install are key. There's a lot of good info in this thread about how to do both correctly.
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Old 02-26-2013, 12:51 AM   #845
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Thanks for the info! I may ask you a few more questions as I try and learn more.
Also I forgot to ask, for the CB (I've had it set up for a while, thanks for all that info as well) but I've heard conflicting info on the length of the coax cable. Does it effect anything? I've heard that certain heights are supposed to have a corresponding length of coax, and I've also heard the shorter the better. Is any of that true, or just trucker engineering?

Thanks again, you're awesome

Last edited by ThirteenFlights; 02-26-2013 at 12:57 AM.
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Old 02-26-2013, 01:15 AM   #846
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If everything about the install is good, the antenna is properly sited and happy, and nothing is weird, then the length of the coax doesn't matter at all except for the general rule that longer coax is less desirable because there's always some signal loss in any coax since reality is a bitch. So, on good installs, shorter is better but in a car-sized install, it really doesn't make enough difference to get wound up about.

However, if there's something wrong with the install and things are going weird, then the length of the coax matters a LOT. However, in almost every case, even if you fiddle with the length of the coax to get the meter to look happy, there's so much loss in the system that the performance just sucks. It may not suck quite as bad as if the coax were a few feet longer or shorter, but it sure as hell sucks compared to a good install.
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Old 02-26-2013, 11:45 AM   #847
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Quote:
Originally Posted by flimflamman View Post
Ty... you need to start your own website. For example,



Your welcome.
Looks like its time for a new decal flim...

ThirteenFlights... thanks for asking those questions, i've been thinking about those things myself.
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Old 02-26-2013, 01:54 PM   #848
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Originally Posted by ThirteenFlights View Post
So I'm taking my first amateur radio exam in a few weeks (wish me luck)
Best of luck to you!
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Old 02-26-2013, 02:24 PM   #849
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Originally Posted by 409Industries View Post
Looks like its time for a new decal flim...
Ha ha... yeah it did not like sticking to the freshly painted light-bar. Funny that is was the "dirt" part that came undone so fast.

I do have a spare but I'm not going to put it on the bar.

People... the only way to have fun is to get it dirty...



Back OT

I've had my NMO mount in the roof for a few years and its holding up well so far. Its been through a few winters in the rust-belt. I probably need to get a new hat for it soon.

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Old 02-26-2013, 02:26 PM   #850
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Ha ha... yeah it did not like sticking to the freshly painted light-bar. Funny that is was the "dirt" part that came undone so fast.
It's better this way
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