MFJ-1270C/1274C MANUAL RADIO INTERFACING
Page 23
RADIO INTERFACING METHODS
The MFJ TNC was designed to allow hook-up without any modifications to the
radio or any signal level balancing devices in the cables. Two interfacing
methods are presented.
Method 1: Direct Connection to Microphone and Speaker
For Method 1, shown in Fig. 3-5, the MFJ TNC 's audio will be fed directly into
the microphone connector or similarly connected auxiliary jack, and the output
of the MFJ TNC will be adjusted to give a proper modulation level. The
receiver audio will be taken from an earphone plug or speaker jack and fed
directly to the MFJ TNC . A monitor speaker can be connected to the SPEAKER
jack of the MFJ TNC . This allows you to monitor the channel.
Fig. 3-5 Method One Interconnect.
