Kenwood MC-48 User manual

KENWOOD
AUTOPATCH MICROPHONE IMvI G = 2}. Ss
INSTRUCTION MANUAL
INTRODUCTION
The MODEL MC-48 is an AUTOPATCH MICRO-
PHONE specifically designed to be used with KEN-
WOOD TRANSCEIVER models TW-4000A, TM-
201A and TM-401A. It features a 16 key AUTO-
PATCH encoder and frequency UP and DOWN
switches.
FEATURES:
1. Microphone is equipped with a tone-pad en-
coder.
2. A built-in delay holds the microphone (and
transceiver) in transmit mode for about 0.7
second between key presses.
Se)
. Micro switch is used for PTT.
4. Specifically designed for transceiver operation to
provide good sensitivity and frequency response
and clear tones.
APPLICABLE MODEL
TW-4000A
TM-201A, TM-401A
SPECIFICATIONS
[GENERAL]
Power requirement
Current drain:
Connector:
Dimensions:
Weight:
[MICROPHONE]
Element:
Sensitivity:
impedance:
[AUTOPATCH]
Key:
Tone output
8.5 VDC + 10%
Less than 20mA (at 8.5
V DC)
8 pins
W 51xH 73x D 33 mm
145 gr. (Approx.)
Electret condensor
—70dB (OdB=1V/1iu
bar)
9002.
16 keys
3.8mV/5.6KQ
(Adjustable)
(With the keys 3 and 6
simultaneously depressed)
G) 8C (+8 V) (4) UP
(3) DWN
© NC
(2) STBY (PTT)
(4) MIC
(8) GND
FRONT VIEW
OPERATION:
16 Key AUTOPATCH encoder
When the tone encoder is started operating, the
transceiver is set in transmit mode even with the
PTT switch released.
Frequency UP/DOWN switches
These switches are used to step the operating fre-
quency up or down.
When the UP or DOWN switch is held depressed,
the frequency shifts rapidly.
PTT switch
Simply press the PTT switch to activate the trans-
mitter.

SCHEMATIC DIAGRAM
LR4087
¢ 3.58MHz X2 100PF R4
Ct 4:7 25V
100 Ye
C6 0.15 50V
Tone level adjustment
1215. 9'Hz
! KMFCIOOIS-CSA
+ KMFCIOOIS-CSC
FREQUENCY RESPONSE
WHITE
PARTS LIST
DESCRIPTION PART NUMBER
Case (Front)
A02-06 14-08
Case (Rear)
A02-06 15-08
UP button
K29-0746-08
DOWN button
K29-0747-08
RESPONSE (dB)
PTT knob
K29-0748-08
Coiled cable
E30-1754-08
Bushing
J42-0440-08
Electlet microphone element
T97-1024-08
Micro switch
20 50 100 200 500 1K 2K
FREQUENCY (Hz)
$50-1408-08
Tactile switch
S50-1406-05
5K 10K 20K ic
LR4087
Ceramic resonator
L78-0003-05
Key board Ass’y
$59-0407-08
Tone module
A product of
TRIO-KENWOOD CORPORATION
17-5, 2-chome, shibuya, shibuya-ku Tokyo 150, Japan
TRIO-KENWOOD COMMUNICATIONS
1111 West Walnut Street. Compton California 90220. USA
TRIO-K OOD COMMUNICATIONS, GmbH
D-6374 Steinbach TS, Industnestrasse 8A, West Germany
TRIO-KENWOOD ELECTRONICS, N.V.
Leuvensesteenweg 504, B-1930 Zaventem. Belgium
TRIO-KENWOOD (AUSTRALIA) PTY. LTD.
4E Woodcock Place, Lane Cove NSW. 2066. Australia
© 35303 PRINTED IN JAPAN B50-4064-08 (KO)
W02-0320-08
14-30-316-01