Hi Tom,
I assume you are actually talking about a UV-6 and not a UV-B6 or UV-6R. They are all 3 quite different radios.
problem. However if I hook up a Baofeng UV-6 and ask chirp to do a download via ttyUSB0 under Ubuntu 14.04 I get "Radio did not respond" error. Nothing else shows in the log even if I use debug level and verbose settings.
Nearly 4 years ago, Baofeng made a significant change to the UV-5R withe the release of BFB291 firmware and at the same time changed the "magic" string that initiates the cloning process. CHIRP was written to send the original "magic", then if there was no response from a pre-BFB291 radio, then the "magic" for the newer radio would be sent. Finally if there was no response from a new radio either, then the cloning process would end with "no response from the radio.
This worked for a long time. The only change that has been made is to now sent the new "magic" first since it is the more likely of the 2 radios.
The UV-6 is another radio that has 2 "magic" strings depending on the age of the radio. Unfortunately, Baofeng made some other slight changes to the handshaking done as part of process to initiate the clone process, of it it doesn't recognize the 1st magic, it ignores the 2nd magic that is sent to it (even if it is the correct magic.
I don't know if putting the new "magic" first in this case would cure the problem without breaking the cloning process for the "original" UV-6 or not.
Jim KC9HI