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Old 12-09-2010, 11:03 PM   #526
parenbizvegasa
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My scanner is in my PDA.
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Old 12-10-2010, 11:23 AM   #527
ejspejsp
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Default Unwanted radio noise question?

My radio in my Impreza makes a lot of humming noise. I have replaced the radio and still get the interference. Is there any filter or any reason why I might be getting this noise?
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Old 12-10-2010, 01:46 PM   #528
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It's probably a grounding problem. Did you run a ground wire from the radio straight back to the negative terminal of the battery?
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Old 12-10-2010, 04:26 PM   #529
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Quote:
Originally Posted by ejspejsp View Post
My radio in my Impreza makes a lot of humming noise. I have replaced the radio and still get the interference. Is there any filter or any reason why I might be getting this noise?
Make sure your Coax isn't routed near your fuel pump. I accidentally did that, and it would cause an air raid type sound to come over the radio. Drove me nuts for about a week until I realized what was going on.

LOL.
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Old 12-10-2010, 05:10 PM   #530
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Quote:
Originally Posted by ttoversteer View Post
Make sure your Coax isn't routed near your fuel pump. I accidentally did that, and it would cause an air raid type sound to come over the radio. Drove me nuts for about a week until I realized what was going on.

LOL.
I had the same problem and ended up giving up and returning the whole thing and scrapping the idea of having a CB in my car... I am interested to re visit installing one and doing it "right"
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Old 12-10-2010, 05:43 PM   #531
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PS... would it be better to run the antena wire up the a pillar, across the roof and down the c pillar and into the trunk.... I had it go down the center console under the carpet and up the middle of the back seat and was getting a ton of buzz...
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Old 12-19-2010, 12:42 AM   #532
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Quote:
Originally Posted by williaty View Post
FWIW, the Realistic 10m is illegal for use in the Citizen's Band. FCC has been sending out very expensive letters to people about that kind of thing lately.
If you limit your TX power to 5W, how would they ever know/care?

Also, anyone have good mounting ideas for a Rigrunner power distribution unit (http://www.westmountainradio.com/pro...s_id=rr_4004_c) and, perhaps, Kenwood TM-D710A in an '07 Impreza 2.5i?
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Old 12-19-2010, 12:46 AM   #533
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Quote:
Originally Posted by starkruzr View Post
If you limit your TX power to 5W, how would they ever know/care?
Generally, because the Realistic stuff is so poorly made that it doesn't meet the technical requirements for type certification into the Citizens' Band. That shows up every time you make a transmission. Not to mention that you wouldn't buy a Realistic unit if you really intended to stick to the legal limit and legal frequencies. It'd be a waste of money.
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Old 12-19-2010, 12:53 AM   #534
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Quote:
Originally Posted by williaty View Post
Generally, because the Realistic stuff is so poorly made that it doesn't meet the technical requirements for type certification into the Citizens' Band. That shows up every time you make a transmission. Not to mention that you wouldn't buy a Realistic unit if you really intended to stick to the legal limit and legal frequencies. It'd be a waste of money.
I keep wondering why Ham gear that runs on 12 and 10m doesn't include 11 just for the hell of it. Minimal additional circuitry. Add a built-in TX power limiter to keep your emissions within CB restrictions. Result: Ham with an unusually clean TX profile on CB (which he/she can use anyway). What's the problem? If any CBer wants to "cheat" they could do so with a linear amplifier and still come in under the cost of a good Ham mobile set.
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Old 12-19-2010, 01:01 AM   #535
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It's how the stuff is Type Certified. Each radio service has a different set of technical documents that define exactly what the radio must and must not do. That's why you don't get combo CB and FRS radios, for instance. The Amateur Radio Service has another layer of complexity. The commercial groups that use radio bandwidth constantly try to get the government to ban the ARS from portions of spectrum and allow them to use it for commercial purposes. There's been a decades-long fight to keep spectrum for ARS and to expand it into the new frontier of GHz frequencies. For reasons that defy understanding, a compromise was reached back in the day where nothing certified for ARS is allowed to participate in any other service and nothing certified for any other service is allowed to participate in ARS. Even commercial gear who's specs greatly exceed the requirements for ARS isn't allowed to be type certified for the ARS due to this stupid rule. This same issue is why you can't do anything business related, like use the radio to tell your boss you're going to be late for work, with any of the ARS radios.

The only thing I can think of is that the commercial lobbyists though that if companies had to make ARS-only radios, they'd decide not to do it because it wasn't a big enough market and the ARS would disappear and then they could grab the spectrum. Turned out waaaay different
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Old 12-19-2010, 01:06 AM   #536
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I have a $30 Cobra Radio from Walmart..but I spent the money on a Wilson 1000 Mag mount antenna. Usually I mount it on the trunk and get a tuned SWR of around 1.2-1.3 (with a 10' extension on the Coax) and can pick up from a good range. If I want to be obnoxious, I put it on the roof and the range I can pick up from is just ridiculous.

Antenna and SWR meter > Radio ANY day of the week.
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Old 12-19-2010, 01:12 AM   #537
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Quote:
Originally Posted by vision.dynamix View Post
Antenna and SWR meter > Radio ANY day of the week.
Troof.

A 108" tall steel pipe planted on top of a disc of metal 108" in radius stuck way up in the air would allow you to talk nearly worldwide on the 4W dead key the CB allows. People in the ARS have an award for talking the most thousand miles away on a mW!

All the antenna on your car is trying to do is to become as close as possible to that monster.
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Old 12-19-2010, 11:36 AM   #538
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williaty, that is the first cogent explanation of the situation I've ever heard/read. Thanks for that.

So it boils down to "stupid politics." Disappointing.

The one part here I don't get is that we are still allowed to repurpoae old public service radios (for example) for the ARS band

(And oRigrunnerI am still looking for a place to mount my Rigrunner.)
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Old 12-19-2010, 12:24 PM   #539
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Well, we, as licensed ARS users, are supposed to know how to stay out of trouble. That's one of the very special things about the ARS. So long as we follow the technical requirements, we're allowed to modify or make just about any toy to use that we want to. However, a commercial company can't do the same for a product they're intending to sell. So we get more leeway than a big company like Icom or Kenwood.
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Old 12-19-2010, 04:09 PM   #540
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Years ago, ham radio gear either covered the 11m band directly or could easily be modified to do so from 10m. Because of the widespread practice of people illegally using this gear for high-powered transmission on CB, the FCC ruled that 10m-capable ham equipment made after a certain date (I do not recall the cutoff) would no longer be able to be so modified.
And yes, type acceptance is different for the different radio services, so even if it is technically possible to modify or program a radio from one service to work on another (i.e. an amateur portable on FRS/GMRS) you aren't supposed to do so. Hams are given some latitude as far as repurposing commercial gear for amateur service, but it doesn't work the other way around.
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Old 12-21-2010, 03:10 PM   #541
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Finally got the CB installed.. have yet to tune the antenna though.
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Old 12-23-2010, 06:18 PM   #542
Zakath
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lmao. got stuck in traffic today for the first time. hilarious.. the cb has to be the best purchase for my car yet. going to get the antenna tuned next week
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Old 01-01-2011, 04:22 PM   #543
LS6 Tommy
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I'm glad I saw this posting. I've been trying to figure out if there's a reasonable way to install my Connex 4300-400 in my '11 WRX 4 door. It was so much easier when cars had consoles thatdidn't meet the bottom of the dash...

Tommy
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Old 01-22-2011, 11:23 PM   #544
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bump im interested
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Old 01-23-2011, 07:46 AM   #545
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Sweet thread, need more pictures... I installed my Yaesu 8800 a while back with a Larsen 2/70B antenna. Next to the 8800 is my Alpine ipod controller. Now I'm trying to figure out how swap out the 8800 for my new Kenwood D710. The 710 has a much larger head unit.

I need to do something about that metal bracket...
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Old 02-21-2011, 12:37 PM   #546
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im new to caravans and driving to meets, can anyone give me some advice as far as radio's and communicating with other members of the caravan? ive read Unibomber's manifesto, and there isnt a whole lot of information as far as which radio's are best.

as of right now, i own a couple Motorola 2 way radios with multiple channels capable of up to 1-2 miles i believe. are these popular with caravans? or do lots of people have CB radios?
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Old 02-21-2011, 02:16 PM   #547
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The single most common, and worst performing, radios for car convoys are the FRS 2-way radios you just mentioned. The next most common, and also next up the performance ladder, is the traditional CB radio. The least common, and best performing, is the amateur radio service (ham) radio.
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Old 02-21-2011, 09:50 PM   #548
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Quote:
Originally Posted by williaty View Post
The single most common, and worst performing, radios for car convoys are the FRS 2-way radios you just mentioned. The next most common, and also next up the performance ladder, is the traditional CB radio. The least common, and best performing, is the amateur radio service (ham) radio.
hmm so a CB radio would be better because you can use it outside of a caravan too right? like for personal use on the highway or something? although highly unlikely in my case, are there any small low profile antenna that are well functioning? ive heard the bigger the antenna, the better?
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Old 02-21-2011, 09:53 PM   #549
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CB radio is better because the technology in it works better for 2-way communication. Generally, that's also paired with better speakers and mics. Overall, it's just much easier to hear and be heard and the other people you're listening to are easier to understand. Yes, you can also use it to talk with other random people on the highway and get updates about things like road conditions and the location of the police. There's no such thing as a small antenna for CB that works worth a damn. The smaller the antenna is, the worse it's going to work.
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Old 02-21-2011, 11:05 PM   #550
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Quote:
Originally Posted by williaty
CB radio is better because the technology in it works better for 2-way communication. Generally, that's also paired with better speakers and mics. Overall, it's just much easier to hear and be heard and the other people you're listening to are easier to understand. Yes, you can also use it to talk with other random people on the highway and get updates about things like road conditions and the location of the police. There's no such thing as a small antenna for CB that works worth a damn. The smaller the antenna is, the worse it's going to work.
Ugh, yea that's what I was afraid of. I'm not a fan of a huge antenna winging from my car. Is there any alternative? Or just deal w it or use 2 ways? Can you explain how a HAM radio would differ from a CB?
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