Question about Cobra FRS 70 (2 Channels) 2-Way Radio

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Information for Cobra Clearcall Model No. FRS 70

The radios will not transmit when the call button is pushed or the PTT button. Both radios have been turned on. Both radios are on the same channel. I also tried switching channels.

Posted by Anonymous on

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Posted on Jan 02, 2017

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Neto
  • 123 Answers

SOURCE: Cobra Li 6000-2 WX VP GMRS/FRS Two-Way Radio

This radios has a Reference Xtal, dropping the radio, could cause that the xtal goes out of frequency, this means tha the radios has a frequency error and the range of opearatin seems to be reduced or even null. With out knowlegement and equipmente, there is nothing that you can do.

Posted on Nov 22, 2006

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SOURCE: Need Cobra FRS 70 user manual

Try cobra.com - they may have a pdf.

Posted on Jan 04, 2009

  • 50 Answers

SOURCE: Cobra LI7200

Please don't touch any internal adjustments. It is like a 10 digit combination lock that is set to open. If you start changing the numbers, you will never get it open.
I think the problem is with your tone coded squelch (CTCSS). Your radio channel is like a telephone party line. If your CTCSS is not on, everytime you turn your radio on you will hear anyone on that channel that is close enough to hear.
If you are trying to use these radios for serious communications, that will drive you nuts to hear everybody else talking but not about what you need to hear. To try to mitigate this problem, CTCSS was created. There are 38 different codes. If you for example set your unit to operate on code 11 and your other unit is set to operate on code 12, you could not hear each other.
Now let's add a third unit set to not use CTCSS at all. Neither one of you will be able to hear this third unit but he can hear both of you. Now you set the second unit to code 11 like the first unit. Now you will be able to hear each other. The third unit will still be able to hear both of you but since he is not transmitting code 11, you still can't hear him.
If you are hearing some traffic, it is because they have their CTCSS set to the same code that you are set to. Look in you operators manual for CTCSS Privacy Codes. Set your radios accordingly and I think you will be in business. Let me know if this doesn't take care of you problem.

Posted on May 29, 2009

  • 14 Answers

SOURCE: Constant RX mode on cobra microtalk PR3850WX

Sounds like the radio was subjected to electrostatic discharge. If you have your manual, and it describes a way to do a "master reset" on the radio, follow the instructions. This usually involves pushing down on one key while turning the radio on. Otherwise you have to find a licensed dealer for factory service, as there is no way to repair the radio yourself. The use of surface mount technology still confuses many Techs unless they have been to a company's two or three week seminars.

Posted on Jul 24, 2009

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If you have not done these steps,

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You didn't include the model number of the radios, but I suspect you're referring to Family Radio Service (FRS) / General Mobile Radio Service (GMRS) two way hand held radios. The FRS /GMRS types are limited to just 1/2 watt. Base GMRS type radios are limited to 5 watts. FRS is limited to Ch 1 - 14. Ch 15 - 22 are GMRS only, and require an FCC license to transmit. You can read more about FRS on Wikipedia.

Many FRS / GMRS two way radios claim incredible distances on the packaging. I've seen some that claim 15+ miles. Given the low power (.5 watt) that they are limited to transmitting, claims such as those would be under the most optimal of conditions. I can assure you that you or I would never encounter those conditions unless we were in some sort of radio laboratory / testing space designed to obtain these crazy distances. In other words, even in optimum "real world" conditions; these radio should only be expected to work when separated up to only several "unobstructed line of sight" miles (such as across open water of a lake, along a beach, etc. The range of these same radios will be reduced significantly when operated indoors, outside between buildings, where blocked by rocks, trees, metal, etc. The only reason you may have reduced range could be due to a power level selector switch that has been set to reduce the output power of the radio. Other than that, I think you'll find a couple of miles is about all you're gong to get.

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4 Answers

Muting the sound


Hi,

The sound produced by a Motorola radio when the mike is keyed refers to the "Transmitting Call Tone" which is another feature other than the "Interference Eliminator" or the "Roger Beep" feature.

On most Motorola GMRS/FRS TalkAbout radios, setting the "Call Tone" to 0 disables the feature. This is done with the radio ON by pressing on the "Menu" button 3 times which will result in the display showing the current Call Tone setting (flashing) and the letters CA; pressing on the <- or +> buttons will change selection (you will also hear the different Tones), select 0 (it may be up to 5 or 10 depending on the version). Press on the "Menu" or "PTT" button to set, save and exit.

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.

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