On Sunday 03 January 2010 16:35:16 Tim N9PUZ wrote: > Rotten Robbie wrote: > > The new units I have been looking at have an optional module that is > > installed in the transceiver and allow direct connection to a PC serial > > port. I assume the optional modules are effectively TNCs. > > > > Are the TNC connectors on the back of the unit that don't have an > > internal TNC merely sound input/output circuits? > > That's typically the case. The big advantage to have the data port vs. > using the microphone jack and external speaker jack is that the audio > output on the data port is a somewhat standard, fixed level. You don't > have to get the volume control set "just right" for it to work. You also > can leave the microphone connected if you aren't dedicating the radio to > data applications. > > Tim, N9PUZ > > Tim,
I don't know which radio you are using for your tnc to the back, but I have had to disconnect the microphone from my Icom ic-207 to use the tnc, other- wise you are going to get audio from the microphone going out also. Thats for 1k2 Packet. For 9k6, the microphone is disabled when the internal menu is set for 9k6. James W8ISS
