[chirp_users] Help! Mac v10.14.5

Jim Unroe rock.unroe at gmail.com
Sat Apr 6 20:54:15 PDT 2019

Hi Dan,

> The Baofang UV-5 radios are finicky, because the Tx and Rx "serial port" lines are shared wtih the audio (mic in and sp out) lines.

Unless I am misunderstanding what you are saying here, they are not
shared. Only the TX data, RX data and ground wires are in a 2-pin
Kenwood style programming cable. The speaker and microphone wires are
left out because they are not needed for cloning. The pinouts of the
2-pin Kenwood style speaker/mic plug can be seen here.


It would be great if they were shared. We could then buy cheap $3
programming cables and cut off the USB end to make cables for APRS and
other projects that need to have speaker and/or mic audio from the

> Therefore, it is essential that you tune the radio to an unused RF channel and trun the volume all the way up to 100%

I have Baofeng, BTech, Retevis, Kenwood, KDC etc. radios (various
models of most) that use the 2-pin Kenwood style programming cable. In
the 7 years I have been programming these radios with a computer, I
have never intentionally turned the volume up any higher than the
"click" it takes to power each radio on (unfortunately I let someone
talk me into putting it into the cloning instructions for the uv5r

I have also never had an issue programming a radio with CHIRP when the
radio is tuned to a busy channel. For example I just downloaded from
and uploaded to my UV-82 while tuned to the local NOAA WX Radio
frequency which is busy 24/7. It is worth noting that some of these
Chinese manufactured radios cannot manually program a memory if the
VFO is tuned to a busy channel.

I do recommend that the radio is tuned to an unused frequency when
programming, though. The reason is because there are several ways that
an improperly configured and/or improperly connected programming cable
can cause the radio to transmit (which would cause interference to the
users of a busy frequency).


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