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Last modified 2022-07-02

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Kenwood / Trio TW-4000A

A picture of Kenwood TW-4000A

SPECIFICATIONS

GENERAL
Type:Amateur VHF/UHF transceiver
Frequency range: Europe
TX: 144-146 / 430-440 MHz
RX: 144-146 / 430-440 MHz
USA
TX: 142-149 / 440-450 MHz
RX: 142-149 / 440-450 MHz
Tuning steps:Europe: 5 / 25 KHz
USA: 5 / 10 / 25 KHz
Frequency stability:15 ppm @ -10 to +50C (14 to 122F)
Mode:FM
Channels / memory management: 6 regular
2 common
1 priority
1 split
RAM storage with lithium battery backup
Repeater shift / offset: Europe
2 m: 600 KHz
70 cm: -1.6 and -7.6 MHz
USA
2 m: 600 KHz
70 cm: 5 MHz
Power supply:13.8 VDC 15%
Current drain / power consumption:RX: 600 mA (No input signal)
TX: Less than 7.5 A
Antenna impedance / connector: Europe
50 ohm / One SO-239 (2 m) and one N-jack (70 cm)
USA
50 ohm / Two SO-239
Dimensions (W*H*D):161*60*217 mm (6.34*2.36*8.54")
Weight:2 Kg (4.41 lb)
Other features: 1750 Hz repeater tone (Europe). CTCSS/PL encoder option (USA).
Dimmer.




RECEIVER SECTION
Receiver system: Double conversion superheterodyne
1st IF: 30.865 MHz
2nd IF: 455 KHz
Sensitivity:0.17 uV (12 dB SINAD)
Selectivity:14 KHz (-6 dB)
28 KHz (-60 dB)
Image rejection:70 dB
AF output power / speaker:2 W at 10% distortion / 8 ohm
External speaker connector:3.5 mm




TRANSMITTER SECTION
RF output power:

HighLow
2 m:25 W5 W
70 cm:25 W5 W
Modulation system:Reactance
FM deviation (Factory set):5 KHz
Spurious emissions:Better than -60 dB
Microphone impedance / connector:500 ohm / 8-pin (Metal locking ring connector)
Microphone input level:? mV




MISCELLANEOUS
Manufactured:Japan, 1983-198x (Discontinued)
Additional info: New price, august 1983 in the US: $539.95
New price, september 1983 in Australia: AUD $699.00
New price, november 1983 in the UK: 469.00
New price 1985 in Sweden: SEK 5857:-

The USA version is supplied with a DTMF microphone
Related documents: User manual (1.5 MB)
VHF RF power module: M57737
UHF RF power module: M57729
Modifications and fixes:
Reviews:
Options / Accessories:
KPS-7A
MA-4000
PG-3A
PS-430
SP-40
TU-4C
VS-1
Power supply. 13.8 VDC, 7 A
Mobile dual band antenna with diplexer
Noise filter
Power supply. 13.8 VDC, 20 A
External compact speaker
CTCSS/PL encoder unit (USA only)
Voice synthesizer unit