Kenwood TH-D7A

EQUIPMENT CONNECTIONS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
CONNECTING EQUIPMENT FOR REMOTE CONTROL
Make connections as shown when remotely controlling
equipment.
Note 1:
Note 2:
SP jack
MIC jack
Note 1
Lock SW
Ø2.5
plug
SW-1 3.9K
Ø3.5
plug
SW-2 10K
SW-3 27K
PTT switch
Note 2 10 µF
External
speaker
External
microphone
Voltage is developed across the 100 Ω resistor in the 3.5 V line
in the transceiver. When 2 mA flows, approximately 3.3 V is
developed.
A 10 µF capacitor is not required in the following cases:
• When the other equipment has DC blocking capacitors.
• When a 2-terminal electret condenser microphone is used.
CONNECTING OTHER EXTERNAL EQUIPMENT
When connecting an external speaker, an external
microphone, or other equipment such as a TNC for
packet radio to the SP jack or MIC jack, refer to the
diagram below.
Speaker
SP
Ground
3.5 V
MIC
PTT
Note 1:
Note 2:
100 Ω
MIC
PTT
3.5 V
Note 1
Ø2.5
plug
Ø3.5
plug
PTT switch
Note 2 10µF
External
speaker,
TNC RX, etc.
External
microphone,
TNC TX, etc.
Voltage is developed across the 100 Ω resistor in the 3.5 V line
in the transceiver. When 2 mA flows, approximately 3.3 V is
developed.
A 10 µF capacitor is not required in the following cases:
• When the other equipment has DC blocking capacitors.
• When a 2-terminal electret condenser microphone is used.
96