Operation; Operating Controls - Kenwood TH-77A Instruction Manual

4. OPERATION
4-1. OPERATING
CONTROLS
@Antenna connector
Connect the antenna that is supplied to this connector.
Twist to lock.
@DC IN terminal
This terminal is used for an external power supply. Input
voltage is 13.8 VDC nominal. The center is the + side
and the sleeve is the — side.
NOTE
You should turn the power switch OFF when connect-
ing a power source to this terminal. Pay close atten-
tion to polarity.
Use the KENWOOD PG-2W or PG-3F optional cable for
connection.
@MIC jack
This jack is used for connection of an_ external
microphone. The use of an electret type microphone is
recommended. Input impedance is 2kQ and the DC
voltage on this terminal is Approx. 4 V (MAX 3.5 mA).
The use of a dynamic microphone is not recommended.
Speaker Hl iE
SP
Ground
Ext. S|
Ext. MIC
: Pals uF
3« Always ensure that this connection is made.
@SP jack
This jack is used to connect an stereophonic external
speaker or earphone. The recommended impedance is
80.
If you hold and press the DUAL key while you turn the
POWER switch to on, the radio will exchange 1 and 2
below.
1. Audio signals from both bands will be heard only
from the external speaker (initial setting).
2. Audio from TX band will be heard from the internal
speaker, and audio from RX band will be heard from
the external speaker.
(lf you hold and press the BAND key while you turn
the POWER switch to on, the band will exchange
each other.)