We have 3 new radios set to channel one. They are not communicating with each other.

read your manual about PL-codes

Setting a Channel

Your radio has 22 channels. Channels 1-7 and 15-22 are 1 watt. Channels 8-14 are

0.5 watt. When the radio is on a 1 watt channel, displays. When the radio is on

a 0.5 watt channel, displays.

1. With the radio on, press . The current channel flashes.

2. Press or to set the channel.

3. Press to save the channel setting. You have a pretty straight forward Low wattage FM Walki/Talki

I would have them returned or replaced.

If you can not transmitt on one to the other

Channel

Channel

Perhaps it is time for a new radio set
Support Cobra Electronics Corporation

Pls swotch off qt & keep the same channel also keep all privacy codes to 0 , try ur set it will get connected to rest 3 , do not forget to keep privacy code 0

Your problem is vague. You could have one not transmitting or one not receiving, or one not doing both. Can you test these independently? Do either of them communicate with another radio?
What you really need is to put these radios on a service monitor and see what each is actually doing in terms of frequency signal generated, power output, deviation, sensitivity....
A radio repair shop should be able to check these out in five minutes

I believe you have a defective microphone in the bad one. Since you have a new warranty, I suggest that you use it and don't wait around.

had the same problem...took out nimh...replaced with triple A...works great!!
Thank you!!

To change channel & code press talk and monitor while turning radio on. Radio will speak current channel. Release both talk and monitor. Press talk to change to next channel or press monitor to keep current channel. Press monitor when desired channel is selected, radio will speak current code. Press talk to change to next code or press monitor to keep current code. Press talk to change code as desired then press monitor when done. Will speak channel and code selected. Set all units in same manner to communicate.

I have T5720s - both have the same settings (channel 1), both are charged, but they won't communicate. They beep when you push the "talk" button, but you don't hear anything on the second radio.

Any ideas?
Thanks!
John