TM-251A / E

Kenwood
TM-251A / E

Specifications

Prices

144 MHz FM mobile Transceiver with 430 MHz band receive capability. Full Duplex allows transmit on the main band with simultaneous receive on the sub-band. From 5 to 50 Watts power output. DTSS / DTMF and CTCSS as option. A microphone key is dedicated to the Call Channel so the frequency can be recalled quickly. The radio is equipped with a connector on the rear panel for Packet operation. Ideated in Japan, year of introduction 1993.

Reference market : amateur-radio

TM-251A / E specifications

General

Frequency coverage
Receive (main)	144.0000 ~ 147.9950 MHz [1][2] 144.0000 ~ 145.9950 MHz [3] 118.0000 ~ 173.9950 MHz [4]
Receive (sub)	438.0000 ~ 449.9950 MHz [1] 430.0000 ~ 439.9950 MHz [2][3] 300.0000 ~ 469.9950 MHz [4]
Transmit	144.0000 ~ 147.9950 MHz [1][2] 144.0000 ~ 145.9950 MHz [3]
Mode
AM [5] / FM
Tuning step
5 / 10 / 12.5 / 15 / 20 / 25 kHz

Receiver

Sensitivity
FM	<0.16 uV (12dB SINAD)
Selectivity
FM	>12 kHz (-6dB) <28 kHz (-60dB)
Frequency stability
±10ppm max
IF (Intermediate Frequency)
1°	45.05 MHz
2°	455 kHz
Squelch sensitivity
<0.1 uV

Transmitter

Output power
FM	5 / 10 / 50 W
Spurious emission
<-60 dBc
Maximum deviation (FM)
±5 kHz
Microphone
600Ω

Features

Memory
40 regular memories [6] 1 call channel 1 scan ranges
Display
sub-kHz frequency resolution 14-segments signal meter bar
Selective calling
DTSS / DTMF 1750 Hz tone CTCSS [7]
Antenna
SO239 50Ω
Power supply
13.8 VDC (nominal) 11.7~15.8 VDC (range)
Power consumption
<0.6A RX (no signal) <11A TX (max RF power)
Audio power
2W on 8Ω
Audio output
Jack 3.5 mm mono (external speaker)
Connections
6-pin mini-DIN (DATA / TNC) 8-pin Jack (Mic)

Mechanical and environmental data

Operating temperature
from -20°C to +60°C
Dimensions
140 (W) x 40 (H) x 160 (D) mm, projections not included
Weight
1kg

TM-251A, USA/Canada version.
TM-251A, General version.
TM-251E, European version.
Some version include expanded receive coverage.
Some version are able to receive AM mode on AIR band.
200 memory channels with optional ME-1 unit installed.
With optional TSU-8 unit installed.

TM-251A / E DATA connector pinout :

Kenwood TM-251 DATA connector pinout

Reference / Description
1	PKD Packet data input. Transmit data from TNC to transceiver.
2	DE Ground for PKD terminal.
3	PKS Packet standby. TNC can use this pin to inhibit the transceiver microphone input while transmitting packet signals.
4	9600D Detects 9600 bps data.
5	1200D Detects 1200 bps data.
6	SQC Squelch control output. Inhibit TNC data transmit while transceiver squelch is open.

TM-251A / E price

We have collected for your convenience the Kenwood TM251 sale price (US Dollar) and its trend over time. Useful to guarantee a cheaper purchase of this radio and to put it for sale in the second-hand market. Of course offers, accessories, warranty terms and conditions can lead to different figures.

Price	Date	Condition
USD 150.90 (145EUR)	2022-feb	Second Hand Great condition overall

TM-251A / E review

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