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Last modified 2022-06-19

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Kenwood TM-255A

A picture of Kenwood TM-255A

SPECIFICATIONS

GENERAL
Type:Amateur VHF transceiver
Frequency range: USA
TX: 144-148 MHz
RX: 144-148 MHz
Tuning steps: Alt. tuning: FM 12.5 KHz, SSB/CW 10 KHz (Defaults)
VFO: "Fuzzy logic" (See the manual)
Frequency stability:2.5 ppm
10 ppm (FM transmit)
Mode:FM / SSB / CW
Channels / memory management: 50 regular
49 split
1 call
1 scan edge pair
RAM storage with lithium battery backup
Repeater shift / offset:600 KHz
Power supply:13.8 VDC 15% (Fixed power cord)
Current drain / power consumption:RX: 900 mA (No signal)
TX: Max 13 A
Antenna impedance / connector:50 ohm / SO-239
Dimensions (W*H*D):180*60*216 mm (7.09*2.36*8.5")
Weight:2.7 Kg (5.95 lb)
Other features: DTSS. CTCSS/PL-encoder (Optional decoder). TCXO. IF Shift.
1K2/9K6 packet jack. Detachable front panel




RECEIVER SECTION
Receiver system: Single conversion superheterodyne (SSB/CW)
IF: 10.695 MHz
Double conversion superheterodyne (FM)
1st IF: 10.695 MHz
2nd IF: 455 KHz
Sensitivity: FM: 0.2 uV (12 dB SINAD)
SSB/CW: 0.13 uV (10 dB (S+N)/N)
Selectivity: FM: 12 KHz (-6 dB), 28 KHz (-60 dB)
SSB/CW: 2.1 KHz (-6 dB), 4.8 KHz (-60 dB)
Image rejection:
AF output power / speaker:2 W at 5% distortion / 8 ohm
External speaker connector:3.5 mm




TRANSMITTER SECTION
RF output power:

HighLow
2 m:40 W5 W
Modulation system: FM: Reactance modulation
SSB: Balanced modulation
FM deviation (Factory set):5 KHz
Spurious emissions:Better than -60 dB
Microphone impedance / connector:600 ohm / 8-pin (Modular)
Microphone input level:? mV




MISCELLANEOUS
Manufactured:Japan, 1994-19xx (Discontinued)
Additional info:
Related documents: User manual (3.7 MB)
Service manual (18 MB)
RF power module: M67727
Modifications and fixes:
Reviews:
Options / Accessories:
DFK-3
DFK-4
DFK-7A
MB-13
MC-45
MC-45DM
MC-45DME
MC-45E
MC-60A
MC-80
MC-85
MJ-88
PG-2N
PG-3G
PG-5A
PS-33
PS-53
SP-41
SP-50B
TSU-8
VS-2
Detachable front panel kit, 3 m (9.8 ft)
Detachable front panel kit, 4 m (13.1 ft)
Detachable front panel kit, 7 m (23 ft)
Mobile mounting bracket
Multifunction microphone
Multifunction microphone with DTMF pad
Multifunction microphone with DTMF pad
Multifunction microphone
Desk microphone, dynamic
Desk microphone, electret
Desk microphone, electret
Microphone plug adapter
DC power cable
DC line noise filter
Data cable
Regulated power supply
Regulated power supply
Mobile speaker
Communications speaker
CTCSS/PL unit
Voice synthesizer unit
A rear picture of Kenwood TM-255A