Packet equipment, Microphone, Microphone ptt – Kenwood TM-451A User Manual
Page 16: Accessory connections
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EXTERNAL SPEAKER
ACCESSORY CONNECTIONS
PACKET EQUIPMENT
Use an external speaker with 8 ohms impedance. The
jack accepts a 3.5 mm diameter mono (2-conductor)
plug. Recommended speakers include the SP-50B and
SP-41. Connecting an external speaker automatically
cuts off audio to the internal speaker.
MICROPHONE
To communicate in the voice modes, plug a 600 ohm
microphone equipped with an 8-pin modular connector
into the modular socket on the Front Panel of the
transceiver. Press firmly on the plug until the locking tab
clicks.
Microphone modular socket
If you intend to use this transceiver for Packet operation,
you will need the following equipment:
• Personal computer with communications software
(Alternatively, a "dumb" terminal capable of sending
ASCII commands)
• TNC (Terminal Node Controller)
• TNC power supply
• RS-232C cable
• 6-pin mini DIN plug (PG-5A)
Refer to the accompanying diagram and the associated
instruction manuals to configure the equipment as
shown. Connect your TNC to the DATA connector on
the transceiver Rear Panel using a cable equipped with a
6-pin mini DIN plug. Do not share a single power supply
between the transceiver and the TNC. Keep as wide a
separation between the transceiver and computer as
practical to reduce noise-pickup by the transceiver.