Question about Uniden PRO510XL 40-Channels Base CB Radio

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Can hear everyone but they can't here me

Is this an antenna problem the antenna is touching the tire carrier. I had no problems when the antenna was on the roof, but that was a magnet antenna, this one is a whip.

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First you need to check your swr it should be a max of 3 to 3 or the unit will shut down the amplifier. if the antana is touching any metal it will thow the swr off if it is running paralell to metal on the vehical will also thow the swr off your bes bet is get it as hi as you can and as far from the body and assories of the vehical as you can.

Posted on Feb 22, 2009

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Hooking up new antenna on jeep spare tire carrier, with a stud mount. drilled tire carrier, installed antenna, turn on radio and nothing. discovered post on stud mount can't touch tire carrier. I then...


CB radios are AM radios operating in the 27Mhz band and are prone to noise even in home installation (though admittedly not as much). A signal on the meter that causes the indicator to move up to as much as 1/4 of the scale is actually pretty good for a mobile installation with the engine running. There are ways to minimize the noise, but none will eliminate it. Here are suggestions - in no particular order:

1) A well grounded antenna. Since you've got metal to metal contact with yours it shouldn't be a problem - the magnetic mounts are more prone to interference and noise that yours.

2) Locate the antenna on a large, flat, horizontal, metal surface. Mobile installs are always a compromise - but the more of these you can incorporate, the better the reception & transmission will be. There will still be noise - but when you receive better signals the "S/N" or "signal to noise ratio" increases - making the sound less noisy.

3) Tune the antenna for lowest SWR (standing wave ratio). You'll need an SWR meter to do this. Be sure to get one that will tune HF antennas - or at least one that works in the 27Mhz band. This is another method of improving the S/N ratio mentioned above. An untuned antenna can cause a transmitter to fail - so this is a must for any transmitter's antenna.

4) Obtain the power directly from the battery. Not the accessory terminal or battery terminal under the dash - but to the battery posts themselves. This is the cleanest (power-wise) source in the vehicle.

5) Install filter on the power lines feeding the radio. A rising and falling (with engine RPM) whine sound is usually alternator noise, and a popping sound is ignition noise. The whine sound can be helped by install a capacitor and the ignition noise by using an inductor or coil. So, if you have both noises, you'll need both filters.

6) Install resistor spark plugs and wires. Years ago, we had to get these as an aftermarket item. I don't know if those supplied by auto manufacturers are resistor types or not - so it may be worthwhile to check it out.

Some vehicles benefit greatly from one or more of these solutions, others - not so much. Some vehicles have noisy subsystems unrelated to ignition or alternator. Some tank mounted fuel pumps can be brutally loud and difficult to silence (check with radio on, and turn the key to run - the fuel pump usually runs for a few seconds - listen for static while the pump runs before starting). The vehicles that will probably have good luck are those that you see used as police, taxi and ambulance vehicles due to the radios and electronics in them.

I hope this helps and good luck! Please rate my reply - thank you.

Mar 04, 2011 | Midland 1001Z 40-Channels Base CB Radio

1 Answer

Well when I call i cant hear the other person talk or even hear the call tone


The antenna for receiving the call is damaged inside your phone,Either that antenna might be a problem or there may be other circuitry issues inside the phone.Changing the antenna costs you Rs.300 or $5.

Dec 11, 2010 | LG Rumor Touch

1 Answer

Signal goes in my area


It happens to everyone, there are always going to be certain dead spots with every phone carrier no matter what, nothing you can do there unless you call the cell phone carrier and have them install an antenna in your area which I know wont happen just for one customer.

Good luck.

Jun 11, 2010 | Motorola Mobility MOTORAZR2 V9 Cellular...

1 Answer

I can't get the swr value close to 1 it's over 3 what am i mising


Several things are working against you.
1 Antenna location= Needs to be in CENTER of car or truck, and high. no grounded metal can be next to the element (the hot/positve part of the antenna)

2 the only way to really ground the antenna is by having a flat metal ground plane under the antenna. DC grounding does NOT do this, that is a misunderstanding.

3 make sure you use a tunable antenna. I have found the wilson's to be very easy to tune and performe very well, for a base loaded antenna.

4 in short a wilson or k40 magnet mount placed on the very top of the roof in the center will have a perfect ground plane. Then shorten or lengthen the steel whip to ajust your SWR's. You will get the best results this way. This is the ONLY way to achevie good performace.

5 I will say this the absoulte best antenna is the 102"steel whip, if you got the clearnce and dont mind it hitting tree limbs put it on a big magnet mount with a spring at the base and youll have a perfect antenna. But the wilson is shorter and easier to tune.

May 15, 2010 | Cobra 29 LTD CB Radio

1 Answer

Can't pick any body up


If you do not hear static DO NOT ATTEMPT TO TALK !!!! Check that the RF gain, RF power is turned up and the squelch is turned down. You may have a problem with your antenna or coax. Make sure the antenna is wired to the radio. Start at the rear of the radio working all way to tip of your antenna, make sure all connections are tight, and that the positive and grounded side of the coax and antenna are not touching one another. the connector that connects the coax to the antenna has a positive center and grounded outside, make sure the grounged outside is not touching the positve element of the antenna. If all this checks out make sure you have matched the antenna to your vechile by checking and ajusting the SWR's. Make sure you have the antenna installed on a flat ground plane ideally the top and cener of the roof. Make sure no metal of the car is close to the driven element of the antenna.

May 11, 2010 | Cobra 29 LTD CB Radio

1 Answer

Hi I have been using the E52 for the past one month. While initially everything about the phone was perfect recently almost everyone has been complaining that they ae unable to hear clearly on the phone....


apparently there is soem problem in the device design , tht the antenna is set on the lower side of the phone , next tiem u have a problem with the voice , u are unable to hear properly , try to hold the phone from the top side , not lower side , and see if ur problem is sloved

Oct 26, 2009 | Nokia E52 Smartphone

1 Answer

Can recieve but not transmit


The mic wires are soldered incorrectly. Get another cobra mic for that radio or have a qualified radio tech correct the wiring.

Apr 15, 2009 | Cobra 29 LTD CB Radio

2 Answers

Rear bearing


rear axle bearings I assume? Pull the diff cover, rotate the carrier so you can remove the pin from the center of the 4 spyder gears, push the axle in slightly, and remove large c clip from the carrier area. The axle will pull right out! These vehicles are hard on axle bearings. Look them all over.

Good Luck!

Apr 02, 2009 | 1996 Jeep Grand Cherokee

2 Answers

Imate ultimate 6150 cannot search for network operator(No service


I just had exactly the same problem, I banged the back of the phone a couple of times on my palm.
I think since it fell the hardware antenna was not touching the connections.
Best of luck
Regards

Dec 25, 2008 | i-mate JAM Pocket PC

1 Answer

On rx , i have a low carrier , sometimes cannot hear someone vs another radio


Depends on how it was modded? Were both the TX and RX broadbanded and tetuned?? Possibly poor work..

May 08, 2008 | Cobra 148 GTL 120-Channels Base CB Radio

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