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Last modified 2022-06-28

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Kenwood TR-851A

A picture of Kenwood TR-851A

SPECIFICATIONS

GENERAL
Type:Amateur UHF transceiver
Frequency range: USA
TX: 430-440 MHz
RX: 430-440 MHz
Tuning steps:FM: 5 / 10 KHz
SSB/CW: 50 Hz, 1 / 5 KHz
Frequency stability:20 ppm @ -20 to +60C (-4 to +140F)
Mode:FM / SSB / CW
Channels / memory management: 10 regular
2 odd split
1 priority
1 com
RAM storage with lithium battery backup
Repeater shift / offset:5 MHz
Power supply:13.8 VDC 15%
Current drain / power consumption:RX: Max 1 A
TX: Max 7.5 A
Antenna impedance / connector:50 ohm / N-jack
Dimensions (W*H*D):180*60*215 mm (7.09*2.36*8.46")
Weight:2.5 Kg (5.51 lb)
Other features:NB. CTCSS/PL option. DCL option.




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 (FM)
Sensitivity: SSB/CW: Better than 0.13 uV (10 dB S+N/N)
FM: Better than 0.2 uV (12 dB SINAD)
Selectivity: SSB/CW: 2.2 KHz (-6 dB), 4.8 KHz (-60 dB)
FM: 12 KHz (-6 dB), 24 KHz (-60 dB)
Image rejection:Better than 70 dB
AF output power/speaker:2 W at 5% distortion / 8 ohm
External speaker connector:3.5 mm




TRANSMITTER SECTION
RF output power:

HighLow
70 cm:25 W5 W
The low level is internally adjustable from 2 to 25 W
Modulation system: FM: Reactance modulation
SSB: Balanced 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, 1987-19xx (Discontinued)
Additional info:
Related documents: User manual (4.9 MB)
Service manual (13.3 MB)
Power device: M57745
Modifications and fixes:
Reviews:
Options / Accessories:
AC-10
CD-10
HS-4
HS-5
HS-6
HS-7
KPS-7A
MB-10
MC-42S
MC-48B
MC-55
MC-60A
MC-80
MC-85
MU-1
PG-2N
PG-3B
PS-50
PS-430
SP-40
SP-50
SP-430
SWT-1
SW-100A
SW-100B
SW-200A
SW-200B
TU-7
VS-1
AC adapter for CD-10
Callsign display
Communication headphones, 8 ohm
Communication headphones, light-weight open-air, 8 ohm
Communication headphones, deluxe light-weight, 12.5 ohm
Micro headphones, 16 ohm
DC power supply
Mobile mounting bracket
Dynamic hand microphone with up/down buttons
Hand microphone with DTMF pad and up/down buttons
Mobile microphone with up/down buttons, gain control and timing circuit
Desk microphone with up/down buttons and switchable impedance
Desk microphone (electret) with up/down buttons
Desk microphone (high-class electret) with low cut filter and level meter
DCL modem unit
DC power cable
DC line noise filter
Heavy duty DC power supply. 13.8 VDC, 20 A
DC power supply. 13.8 VDC, 10 A (20 A peak)
Compact mobile speaker, 4 ohm
Mobile speaker, 8 ohm
External speaker
Antenna tuning unit, 2 m band
SWR/Power meter, 1.8-150 MHz
SWR/Power meter, 140-450 MHz
SWR/Power peak/RMS meter, 1.8-150 MHz
SWR/Power peak/RMS meter, 140-450 MHz
CTCSS/PL tone unit
Voice synthesizer unit