Question about Connex 4600 Base CB Radio

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Background noise I have an unusual amount of background noise. I can't seem to get rid of it without setting my squelch so high that I can't receive anyone more than 5 feet from me or turnning my rf gain down to the same point. I realize that some noise is normal but this gets so bad I can't hear anyone talking, even when they are real close to me.

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  • ray cobb Feb 06, 2009

    at a stop or slow speeds little background noise. speed up to driving speed background noise increases to where i can't hear anybody. after driving a mile or two background noise starts to break up then goes to normal. i have checked all connections on ant. coax &power cables all clean&tight.

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Buy an inline filter, the alternator on your vehicle interferes with the sound. that is all you need. you can find them at any good cb shop.

Posted on Nov 22, 2009

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I'm not an expert but I am a daily operator. First check your ground connection, just because the radio turns on doesn't mean the ground is good enough. If this unit is mobile there are several things you can do to reduce the noise. First you need to find out if the noise is coming in thruogh the antena or the power supply; turn on your radio and vehicle, unhook the antena. If the noise goes away or is reduced you know that it is RF noise. this is interference from some outside source, powerlines, TV, just about any thing that uses electricity or electronics can cause noise. relocating the antena may help. Check you antena connections. Check your SWR. This is only a few of the things you can check.

Posted on May 10, 2008

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Turn the squelch control clockwise just enough to cut the background noise, this should work well for local communication.

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From my experience, Galaxy radio's have a much quieter receive, as were the cobra 29 seems to be a bit more loud, with more background noise.

The cobra 29 still has one of the best receives out there. There may be louder static, but it picks up amazingly.

If this radio had a clarifier it would be easy to tell if the receive was off. You could just tune it as you are receiving, and if it got better as you tuned it off center you would know. Otherwise you would have to open the radio, and adjust the receive by ear, which is something where you may do more harm then good.

The proper way to align the radio requires the use of a watt meter and volt meter, which are easy to come by, but as well you will need an oscilloscope, which is a more expensive piece of equipment to own.

If the unit is new, then it's under warranty. Contact galaxy, see what they say. Their tech support is pretty good.

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If the unit seems to be receiving on freq, (no muffled or distorted receive) and it is working well besides having a less sensitive receive, then I would say it's just that radio.

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Key up and say, "Break one nine for a radio check" and a trucker will come back and tell you its working. If you hear him okay, then your radio is working fine.

Some days, background noise is heavier and lighter then others.

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Reception has little to do with grounding. The ground plan is for transmitting. As long as the coax is connected and is in good standing, it should receive fine regardless of grounding.

There are a few reasons you may have bad reception.
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  2. Squelch is too high. It should only be turned up enough to cut out the background noise.
  3. Poor antenna. If the antenna is cheap, and not made well, this could be the problem.
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Recieving problems


turn the RF gain all the way up and leave it there. Also turn the squelch down until you hear white noise, then turn it up just until it goes away.

RF gain is how sensitive your receive is. The higher it is, the more range you have. There really is no need to turn it down ever, unless you are trying to not hear some one out in the distance. Normal operation, RF gain should be all the way up.

Now squelch is used to quiet non signal noise. Like white noise or interference noise, Or other radios with a really weak signal that you can't hear completely any way.

You just want it so it just quiets the fuzz noise. Depending on background interference and the amount of radio traffic, the may have to be adjusted to silence the noise you don't want to hear. When a strong audio signal is received, it will break the squelch, the higher the squelch is set, the stronger the signal needs to be to break it, otherwise it will silence it.

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Hi,

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Audio IN (from Mic)
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To determine which is which on the radio side:
a. the Audio IN (from Mic) would read a high resistance to ground (chassis) of CB radio;
b. the Speaker when connected to the ground would activate the receive speaker. To verify, power up the radio, squelch all the way down, when shorted to ground, speaker will produce background noise/sound;
c. when PTT (TX) is shorted to the ground, the rig will transmit and the red TX indicator will light up;
d. Ground. when tested with an Ohmmeter to the chassis will read 0 ohms.

Hope this be of some help/idea. Pls post back how things turn up or should you need additional information.

Good luck and kind regards.

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