Kenwood TM 521 A Owners Manual

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Thank you for purchasing the new transceiver. This
unit has been carefully engineered and manufac-
tured to rigid quality standards, and should give you
satisfactory and dependable operation for many
years.

IMPORTANT: %

1. Please read this Instruction Manual carefully
before placing your transceiver in service.

2. Save this Instruction Manual.

This Instruction Manual covers the following
models:

TM-221A : 144MHz FM transceiver (45W)
(U.S.A. and general markets)

TM-221ES: 144 MHz FM transceiver I45W)
(U.K. and European markets)

TM~321A :220 MHz FM transceiver (25W)
(U.S.A. only)

TM-421A :430 MHz FM transceiver (35W)
(General markets)

TM-421A :440 MHz FM transceiver 135W)
(U.S.A. only)

TM-421ES : 430 MHz FM transceiver (35W)
(U.K. and European markets)

TM-521A : 1200 MHz FM transceiver (10W)
(U.S.A. only)

TM-521E : 1200 MHz FM transceiver (10W)
(European market)

When there are differences in operation,
separate instructions will be given for each
model. Illustrations show the TM~221 A.

The following explicit definitions apply in this

manual:

Warning: Risk of fire or electric shock may occur.
Do not disregard !

Caution : Equipment damage may occur, but not
personal injury.

Note : If disregarded, inconvenience only, no risk
of equipment damage or persona) injury.

TM-221ES/421ES MODEL IDENTIFICATION NOTES.
Please note that these model numbers do not appear
on the front panel of the radio. It will appear on the
Model Number Plate on the bottom of the radio and
on the shipping box. The front panel will only say
TM-221E or TM-421 E.

1. BEFORE OPERATION ...................................
2. SPECIFICATIONS AND ACCESSORIES
2-1 .
2-2.
3. INSTALLATION AND CONNECTION ..
3-1 .
3-2,
4. OPERATION .................................
4-1 ,
4-2.
4-3.
4~4,
45,
4-6.
4-7.
4-8.
5. MAINTENANCE AND ADJUSTMENT.
5-1 .

CONTENTS

SPECIFICATIONS ......
ACCESSORIES .........

INSTALLATION ....................
CONNECTIONS .........................

oomumoame-Aw

CONTROL FUNCTIONS . ..
RECEPTION ...................................... 1 1
TRANSMISSION .................................... 13
MEMORY ......
SCAN ........................................
REPEATER ...............................
TONE FREQUENCY SELECTION.
TONE SQUELCH (CTCSS) ......

GENERAL INFORMATION . ..

5-2. SERVICE ..........................

5-3, CLEANING ..................................

54. IN CASE OF DIFFICULTY ...................

5-5. MICROPROCESSOR BACKUP LITHIUM

BATTERY REPLACEMENT ....................... 19

5-6. FUSE REPLACEMENT ....... ..19

5-7. ORDERING SPARE PARTS. .19

5-8. ADJUSTMENTS ........... ..19
6. OPTIONAL ACCESSORIES ........................... 20

6-1. TSU-5 PROGRAMMABLE TONE

62.
6-3.
7. BLOCK DIAGRAM AND CIRCUIT DIAGRAM
7-1 ,
7-2.
8. REFERENCE .............
8-1 .
8»2.

DECODER UNIT ..................................... 20
M0433 HAND MICROPHONE
OTHER ACCESSORIES ........

BLOCK DIAGRAM ...........................
CIRCUIT DIAGRAM .

ANTENNA .......... ..
MOBILE INSTALLATION HINTS ................. 30

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2. SPECIFICATIONS AND ACCESSORIES

2-1. SPECIFICATIONS

s .. . M°d°' TM-221A TM-221ES TM-321A TM-421A TM-421Es TM-521A TM-521E
pecrfrcatlons
Freauencv range 1121332 1121232 2§§°M'filz 4 2321*113'32;W 124° .0 130° MHZ
Mode F3E (FMI
Antenna impedance 50 ohms
Operating temperature - 20°C to + 60°C l-4°F to +140°F)
Power requirement 13.8 VDC 115%
Grounding Negative
g Tarsmi "we 9.5 A 6.5 A 8.5 A 5.5 A
g Current (Max.)
0 drain 'v m e i h
222:1): siggal Wt 04 A 0'6 A
Frequency stability Better than :10 x 10 Better than a: 3 X 10
Wide 141 mm (5-9/16)
Dimensions High 42 mm (1-21/32 l
Deep 193 mm i7-19/32")
Weight 1.2 kg (2.65 lbs)
HI 45 w 25 w | 35 w 10 w
*Output power Approx. 5 W. Approx. 5 W. Approx. 1 W.
5 LOW nglxtable up to out Adjustable up to out 20 W. QWstable up to out
% Modulation Reactance modulation
2 Spurious radiation Less than -60 d8 Less than - 50 dB
.2 Max. frequency deviation :5 kHz
:2gflg'iirgmon (at 60% Less than 3%
Microphone impedance 500 to 600 ohms
Circuitry Double conversion superheterodyne
Intermediate 151: 10.695 MHz 10.7 MHz [30.825MH2 21.6 MHz 1 59.7 MHz
frequency 2nd 455 kHz
; Sensitivityl12 dB SINAD) Less than 0.16 pV
3-, _ _ -6 dB More than 12 kHz
5% Selectivrty -60 dB Less than 26 kHz Less than 36 kHz
Spurious response Better than 70 dB Better than 65 dB Better than 40 dB
Squelch sensitivity Less than 0.1 p.V
Output (5% distortion) More than 2 W across 8 ohms load
External speaker impedance 8 ohms
Notes:
1. Circuit and ratings are subject to change without 2. * : Recommended duty cycle:
notice due to advancements in technology. 1 minute : Transmission
3 minutes : Reception
4

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7-1-4. TM-521 series

Block Diagram is subject to change without notice due to advancements in technology.

Nata:

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