I have 2 Boafeng UV-82 radios. I programmed the frequencies using Chirp. When I try to access the repeaters in channel mode I cannot connect. When I switch to frequency mode and turn off the duplex offset, I can access the repeater. In channel mode I cannot talk to the other handheld. In frequency mode, I can talk to the other handheld. I made sure the T-CTCS frequency for the tone is set according to the repeater data. Any thoughts on how to fix the problem?
It sounds like you may have the offset (either direction or distance) configured incorrectly. I would suggest you try to locate your state's repeater council's web site to see what the official frequency, tone, and off-set are.
Though there are standard offsets for repeaters on UHF and VHF, they can be configured by the trustee of the repeater, so if you can't connect then you might need to double check your info.
73 de N5JLC
In short the unit is defective, despite rather called UV-82 or UV-82L the unit is defective. I have purchased and configured many Baofeng UV-82 units including the GT-3TP. of the 19+ UV-82 units I have programmed, I too have encountered that same problem a couple times. If you are using the chirp software and are copying and pasting the memory frequencies from a working unit in Channel mode, and still not able to transmit in channel mode then You know it's NOT a user programming error. I have successfully copied and pasted my fleet Memory Range before and after recognizing a brand new purchased defective units. again you have a defective unit, stop wrecking your brain re-programming that unit over and over thinking you missed a step, configured incorrectly or done something wrong. :-)
This just happened to me with a new UV-82HP purchased from Btech through Amazon. Btech support will send you a youtube link (https://youtu.be/CrG0El1KkIM) with a demonstration on how to program. Follow it exactly (assuming you have an HP). When Btech became a problem, I took it to Amazon support linked in the Help side menu choice. I'd avoid CHirp for the time being. The FT-2900 issue (rendering radios inoperative) and my UV-82's blowup scare me.