Question about Icom M302 VHF Radio

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Some reception produces a crackle noise and stronger ones not. This is not a squelch issue. It is a different noise, like a short in the antenna or something.

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Check the antenna PL259 connector. It sounds like the ground (shield of the coax) is not attached properly. I would recommend replacing it with a solder type connector and solder the shield to the outer ring of the connector and the center conductor to the tip of the connector. If the problem still exists, I would recommend trying a different antenna.

Posted on Jun 14, 2010

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1 Answer

Yaesu ft-857 squelch problem


Your RF gain control needs to be turned all the way up to be able to receive signals and if you are on one of the HF bands like 40 meters or any HF band the squelch control needs to be all the way off! You do not use squelch on HF! When on VHF or UHF then you would rotate the squelch control just to the point that the background noise stops and go no further. Higher squelch settings will only block weak signals and your radio will be deaf! Squelch control rotated just to the point the background noise stops! NO SQUELCH ON HF. Turn the squelch all the way off on HF!

Feb 01, 2017 | Yaesu Radio Communications

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How can i stop the squelch ive tryed turning the sqcuelch doesnt help


Plug the AC adapter into the back of the scanner and into a wall electrical outlet. Screw the antenna into the receptacle on the back of the scanner (extend the antenna to full length for best reception).

  • 2 Set the squelch level to allow signals to be heard by turning the squelch knob counterclockwise. Rotate the volume knob clockwise until you hear static. Slowly turn the squelch knob clockwise until the static noise disappears.
  • 3 Start programming frequencies into the scanner by pressing the "Manual" button.
  • 4 Press the up arrow or down arrow key until the channel you wish to program is visible on the display.
  • 5 Use the numbers on the keypad to enter the frequency for the local transmitter you wish to receive.
  • 6 Press the "E" key to complete the process of entering the frequency.
  • 7 Repeat steps 3 through 6 for each additional frequency you wish to monitor.
  • 8 Press the "Scan" key to start the scanning process. The scanner stops on a channel when it detects a signal strong enough to hear over the squelch setting. Two seconds after the signal stops, the scanning process resumes.
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    I get static so bad that I can't squelch it down enough to get rid of the noise. Traveling out on the highway it usually works ok. But when I enter a town the static gets badusually around power lines. How...


    You could install a filter in the line between the antenna and the transciever. I reccommend a high-pass or band-pass filter set for the 27 MHz band to remove any interference at different frequencies. Also, some older TVs can cause interference to CB radios if they are close. If this doesn't work, the radio may be poorly sheilded or your area may have implemented the broadband power line initiative (BPL). This produces a strong buzz of noise that obliterates all weak to moderate radio signals between 2 and 80 MHz (CB being at 27 MHz).

    May 21, 2010 | Cobra 19 DX IV CB Radio

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    My cb radio has good reception but only for a short distance, why ?


    Make sure your squelch is not on, keep it all the way to the left and the RF Gain must be all the way to the right...

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    Excessive static equally on all chanels on cb


    You should always connect the CB directly to the battery as the accessory socket is full of noise. You also should choose a better antenna as these small glass mounts cannot hear signals well and magnify local noise. AM (CBs) radios naturally pick up noise as it is the nature of AM signals. Use your squelch to lesson this but too much can knock out you reception.

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    Reception is very poor. Grounding issues? Please


    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.
    1. Turn the RF GAIN all the way up. This is your receive sensitivity.
    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.
    4. Not enough of the antenna above the vehicle. It needs to be at least 60% of the antenna above the vehicle.
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    Samson CR77 receiver and AF1 transmitter. The CR77 receiver swaps antennas during reception even at close range and there is an audible 'pop' when it swaps.


    There are two receivers and are used as "diversity" reception. That is, the strongest signal receiver output is used. As you move around, due to cancellation and reflections it is common for the diversity system to swap receivers. This is normal... HOWEVER there should not be a poplwhen it does this. You might experiment with the squelch level to improve performance. There is a possibilty there is a defect in your unit and repair would be beyond the capabilty and equipment you would have to troubleshoot the problem.

    ONE thing is make sure the audio levels are turn up so the level is "not down in the noise" or in other words you have a good signal-to-noise ratio.

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    I have the exact same problem with the exact same stereo. I started by removing the in-line AM/FM/VHF Separator and connecting the antenna directly to the stereo. The static/popping/fade-out continued. Today I swapped to a new antenna, but it did not help. I swapped back to the original antenna and for a brief while, I had good reception. The I went to coil the excess antenna cable and the static/popping/fade-out resumed. I have narrowed it down to either the antenna connector coming out of the back of the stereo or an internal circuit. Either way, it does not look like a do-it-yourself fix.

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    Cobra 29ltd


    You have antenna or Coax Problems...

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    Pro 97 not working


    This is just a guess but sounds like your antenna connection (inside the unit) has broken. If you use the antenna as a handle it will eventually break. Radio Shack will repair it for a flat fee of $40 (that was the price the last time I checked) plus shipping. Or if you are really good at soldering and have good eye sight, you can repair it your self.
    Your local radioshack should be able to send it in for repair.

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