Question about Cobra 22 CHANNEL 2-WAY RADIOS

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Long range mode

Cobra #PR4700WX I have lost manuel and cant turn off the long range mode for fishing was all right but for hunting there is to much static .Both these radios are set in this mode .
Cobra #PR3500DX I have the same proplem with 1 radio, the one that is working properley has the power saving flashing and the transmission message icon off when not in use. The other three the transmission signal is on at all times and the power saving is off . Can you help. Bob In Waterloo On

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  • Pounderbilly Nov 08, 2007

    I did download the manuals and I was reffered to the light /max range button. I held it for 2 beeps and then pressed it again, but the static is still there. Changing channels did not work. Landscape didnt effect the units last year ,I have noticed that if my fingers are on the antenna that the static dissapers and the powersaver starts flashing. Sorry to bother you but I would like to solve this problem of the 3 units Bob

  • Pounderbilly Dec 12, 2007

    Thank you Benimur you solved my problem



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We bought a cobra hl-200p its says 2mile range but it doest mit the standard range for about 50 feet we can no longer transmit and when we set to max range we only hear loud static can you help us on this problem? tnx we only have 2days warranty

Posted on Jan 14, 2008

  • tops14 Jan 14, 2008

    my fault sir its says its a 6 mile range when we try to max it we only hear a loud satic.. what should we do??tnx in advance


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For the Cobra PR4700WX:
The user's manual is available here
To turn on/off the long range mode - (If you are referring to low & high power); Press and hold the Hi•Low/Enter button for two seconds.
Alternately, if you are referring to the Light/Max Range (receive sensitivity), 3 options:
1. To briefly turn off auto squelch - Press the Light/Max Range button for less than five seconds. If you hear two beeps, you have turned the maximum range extender on.
2. To turn maximum range extender on - Press and hold the Light/Max Range button for at least five seconds until you hear
two beeps which indicates the maximum range extender is on.
3. To turn maximum range extender off - Press and release the Light/Max Range button or change channels.
Probable reason that "fishing was all right but for hunting there is to much static" is becasue these radios operate on line of sight principle. Anything that obstructs the linear view would reduce signal strength/range. There is not that much obstruction when fishing compared to that when hunting in the woods or rough uneven terrain.
Please note that when using Channels 1 through 7 and 15 through 22 on high power, the Hi icon will be visible on the display. When using those channels on low power and on Channels 8 through 14, the Low icon will be visible on the display.

For the Cobra PR3500DX:
The user's manual is available here.
The transmission message icon off when not in use - this icon will only display if the radio is receiving something or if your are pressing the PTT button.
The other three the transmission signal is on at all times - indicates that either you are transmitting (unlikely) or the radio is in constant receive mode (most likely). I would venture a guess that the Auto Squelch is switched "OFF" or Maximum Range is switched "ON"

Both the 4700 & 3500 has Power Saver and it is a built-in feature. Your radios have this unique circuit designed that extend battery life. If there are no transmissions for 10 seconds, the radio will automatically switch to Battery Save mode and the Power Saver icon will flash in the display. This will not affect the radio’s ability to receive incoming transmissions.

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

Good luck and kind regards.

Posted on Nov 07, 2007

  • Louie  Role
    Louie Role Nov 08, 2007

    light /max range button - in reality is the squelch setting. Setting it to max range reduces the squelch making the radio more receptive even to weak signals. The idea is to reduce the restriction on the sensitivity and in doing so allows any weak signal to come in including static. Touoching the antenna would be introducing capacitance effect with your body and the incoming signal is partially reduced/b;pcked (perhaps including even the static).

    Working on the premise that nothing is wrong with the unit and settings only required, try setting the Max Range to OFF; verify that VOX is also OFF.

    On the other hand, if something is wrong with the unit, setting the Max Range to OFF should not make any difference and you will still be getting static. Since you have noticed that static disappears if your fingers are on the antenna, we can consider exploring the possibility of a hardware fault. Initially we can focus on the antenna and its mounting. Most professional 2-way radios have some sort of bayonet/BNC type of connector. Normally, radios of the FRS & GMRS (inlcuding Motorolas, the Cobra models that you have & others of the sort) type uses a fixed soldered antenna covered by a thick rubber skin to serve as an antenna. You have to remove the rear casing of the radio to expose the internal printed circuit board. Locate the topend where your antenna goes into. Determine if there are any loose or disconnected solder joints, reheat with a low wattage soldering iron.

    Alternately, if all else still works within certain tolerance, try using the CTCSS Privacy Code Numbers on all your radio. Engaging/enabling CTCSS filter will not only reduce but eliminate any reception that does not have the same CTCSS code (hopefully including static/noise).

    Should the initial positing as well as this one fail to correct your problems, perhaps it may be to your advantage to seek the services of an on-site repair person since further diagnosis would require a hands-on to the unit, electronic circuitry & component familiarity as well as use of a DVM. Pls take into consideration likewise that at times, the repair option may not be that economically reasonable compared to just purchasing replacement units.

    And please, it is no bother and that's why we're here. As an angler myself, I do understand your need to have the radios repaired.

    Tight lines.



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Facts about Cb radio.

a Cb(Citizens Band) radio usually only broadcast on frequencies 26.965 to 27.405 megahertz. It is for mostly short range use 3 to 20 miles range. It comes with legal power of 4 watts. Ranges average about 5 miles. Don't expect big results off this little low-power Am transmitter. A basic 40 channel radio, Microphone, and "Magnet Mount" antenna plus 12 volt Dc 5A power supply will suffice. Place the Magnet mount on a metal file cabinet inside your house. hook up the Radio Shack 12 volt 3-5 Amp power supply to your 40 channel radio, Say Uniden pro510xl or Cobra 19 plus mini compact about $39 for these types. A $20 Radio Shack magnet mount. Turn on radio an talk. If you live in the city near lots of friends who have one too. You can talk on a private channel like Ch#40 and talk all night. The waves get quieter at night and extend farther into the Ionesphere;conditions are favorable 8pm to 12am. You should talk loudly within 5-7 miles easy. I like friends nearby; who live within 3 miles of me. Don't expect Long Distance with these radios. Unless you buy a big 1000 Watt Rf Linear an Tower 100 ft. with big Antennas costing $10,000. But remember the FCC will knock on your door and may give you 5 years $10,000 fines for anything of Linear amps 1000Watts. Just stick with basic tune and adjust,power mics(Cobra sells best). Talk with friends about fishing,hunting,gardens,tools,cars,women etc. Have Fun!!!

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Hello horndog78,

Your radio may be locked. You can confirm this by looking for a icon of a padlock on the screen.

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Best Regards,
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Hi again,

It would seem that you posted twice. As responded to in your other post, the manual is here.


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