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Last modified 2022-06-27

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Kenwood TM-842

A picture of Kenwood TM-842
The radio on this picture has a 2 m option fitted

SPECIFICATIONS

GENERAL
Type:Amateur UHF transceiver
Frequency range: Japanese domestic market
TX: 430-440 / 1260-1300 MHz
RX: 430-440 / 1260-1300 MHz
Band options
2 m or 6 m
Tuning steps:70 cm: 5 / 10 / 12.5 / 15 / 20 / 25 KHz
23 cm: 10 / 12.5 / 20 / 25 KHz
Frequency stability:10 ppm @ -20 to +60C (-4 to +140F), 3 ppm for 23 cm
Mode:FM
Channels / memory management: 100 regular per band
1 call per band
RAM storage with lithium backup battery
Repeater shift / offset:70 cm: 5 MHz
23 cm: 20 MHz
Power supply:13.8 VDC 15%
Current drain / power consumption:RX: 1.2 A (No signal)
TX: Max 6.5 A
Antenna impedance / connector:50 ohm / ? (On pigtails)
Dimensions (W*H*D):150*50*175 mm (5.91*1.97*6.89")
Weight:1.5 Kg (3.31 lb)
Other features: CTCSS/PL encoder. DTMF. DTSS. Alarm clock.
Twin RX (Triple RX with optional band unit).




RECEIVER SECTION
Receiver system: Double conversion superheterodyne
1st IF: 21.6 MHz (70 cm) - 59.7 MHz (23 cM)
2nd IF: 455 KHz
Sensitivity:0.16 uV (12 dB SINAD)
Selectivity:12 KHz (-6 dB)
70 cm: 24 KHz (-60 dB) - 23 cm: 36 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
23 cm:10 W1 W
Modulation system:Reactance modulation
FM deviation (Factory set):5 KHz
Spurious emissions:70 cm: Better than -60 dB
23 cm: Better than -50 dB
Microphone impedance / connector:600 ohm / 8-pin (Modular)
Microphone input level:? mV




MISCELLANEOUS
Manufactured:199x-199x (Discontinued)
Additional info:
Related documents: 70 cm power module: M57752
23 cm power module: M67711
Modifications and fixes:
Reviews:
Options / Accessories:
DFK-3
DFK-4
DFK-7
FA-5
MB-14
MC-45
MC-45DM
MJ-88
MJ-89
PG-2N
PG-3B
PG-3G
PS-32
SP-41
SP-50B
TSU-7
UT-50
UT-50S
UT-144
UT-144D
UT-144S
Detachable front panel mounting kit. 3 m (9.8 ft)
Detachable front panel mounting kit. 4 m (13.12 ft)
Detachable front panel mounting kit. 7 m (23 ft)
Cooling fan unit?
Mobile mounting bracket
Multifunction hand microphone
Multifunction hand microphone with DTMF
Modular to 8-pin microphone adapter
Modular plug microphone switch
DC cable
Noise filter power cable
DC line noise filter (High capacitance)
Power supply. 13.8 VDC, 20 A
Mobile speaker
Communications speaker
CTCSS/PL decoder unit
6 m / 10 W band unit
6 m / 50 W band unit
2 m / 10 W band unit
2 m / 25 W band unit
2 m / 50 W band unit