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Last modified 2022-06-21

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Kenwood TM-421E

A picture of Kenwood TM-421E

SPECIFICATIONS

GENERAL
Type:Amateur UHF transceiver
Frequency range: Europe
TX: 430-440 MHz
RX: 430-440 MHz
Tuning steps:5 / 10 / 12.5 / 15 / 20 / 25 KHz
Frequency stability:10 ppm @-20 to +60C (-4 to +14F)
Mode:FM
Channels / memory management: 10 regular (0-9) of which #1 functions as priority channel
2 band edge search limits
2 odd repeater split
RAM storage with lithium battery backup
Repeater shift / offset: Europe: -1.6 and -7.6 MHz
England: 1.6 MHz
Power supply:13.8 VDC 15%
Current drain / power consumption:RX: 400 mA (No signal)
TX: Max 3.2 A
Antenna impedance / connector:50 ohm / SO-239 (On pigtail)
Dimensions (W*H*D):141*42*154 mm (5.55*1.65*6.06")
Weight:1 Kg (2.2 lb)
Other features:1750 Hz repeater tone.




RECEIVER SECTION
Receiver system: Double conversion superheterodyne
1st IF: 21.6 MHz
2nd IF: 455 KHz
Sensitivity:0.16 uV (12 dB SINAD)
Selectivity:12 KHz (-6 dB), 26 KHz (-60 dB)
Image rejection:
AF output power / speaker:2 W at 5% distortion / 8 ohm
External speaker connector:3.5 mm, 8 ohm




TRANSMITTER SECTION
RF output power:

HighLow
70 cm:10 W1 W
Modulation system:Reactance modulation
FM deviation (Factory set):5 KHz
Spurious emissions:Better than -60 dB
Microphone impedance / connector:500-600 ohm / 8-pin (Metal locking ring connector)
Microphone input level:? mV




MISCELLANEOUS
Manufactured:Japan, 1987-198x (Discontinued)
Additional info:
Related documents:User manual (2.2 MB)
Modifications and fixes:
Reviews:
Options / Accessories:
HS-7
MB-201
MC-43S
MC-48B
MC-55
MC-60A
MC-80
MC-85
PG-2N
PG-3B
PS-50
PS-430
RC-10
SP-40
SP-50B
SP-430
SW-100A
SW-100B
SW-200A
SW-200B
SWT-1
SWT-2
Micro headphones, 16 ohm
Mobile mount
Hand microphone with up/down buttons
Hand microphone with up/down and DTMF keypad
Mobile microphone with up/down buttons
Desk microphone with up/down and lock buttons
Desk microphone with up/down and lock buttons
High class electret desk microphone
DC power cable
DC line noise filter
Heavy duty DC power supply
DC power supply
Remote controller with DTMF/autopatch
Compact mobile speaker, 4 ohm
Mobile speaker, 8 ohm
External speaker
Compact SWR/Power/Volt meter, 1.8-150 MHz
Compact SWR/Power/Volt meter, 140-450 MHz
SWR/power meter. Peak or RMS. 1.8-150 MHz
SWR/power meter. Peak or RMS. 140-450 MHz
Antenna tuning unit, 2 m
Antenna tuning unit, 70 cm