Base Station Installation
A power supply capable of providing at least 10A continuously at 13.8VDC is
required for operation from the AC line, and an external speaker is recommended.
The FP-700 AC power supply is available from your Yaesu dealer for this purpose.
Use the fused DC power cable supplied with the transceiver for making power
connections, and connect the external speaker to the EXT SP jack on the rear panel.
Packet Radio TNC Interconnections
Most popular packet radio tncs can be connected to the MIC jack of the FT-712RH
as follows:
TNC Jack to Radio FT-712RH MIC Jack
Receiver Audio in
pin 4 (8 ohms, de-emphasized)
Squelch Status in
pin 5* (open=8V, closed=0V 1 mA)
PTT (gnd=tx) out
pin 6
Transmit Audio out
pin 8 (400 ohms, pre-emphasized)
Use shielded cable for the audio lines, and keep the interconnecting cable as short
as possible to avoid RF pickup.
* Requires modification as described on page 17.
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