Equipment information

Kenwood TKR-850 Transceiver
Manufacturer
Kenwood
Model TKR-850
Date 2001
Category: Radio, Communication
Group Transceiver
Description UHF FM TRANSCEIVER
Information
                                    GENERAL
Frequency Range ........................................ 440
to 470MHz
Number of Channels .................................. 16 channel
Channel Spacing .........................................
Wide : 25kHz Narrow : 12.5kHz (PLL channel stepping
5kHz/6.25kHz)
Operating Voltage .......................................
13.2V DC
Current Drain
Standby ................................................... 0.8A
Standby w/power save ........................... 0.3A
(Operating mode DC-IN : Backup, FAN : Temp, SAVE : ON, DISP
: OFF)
Receive ................................................... 1.2A
Transmit/Receive .................................... Less
than 13A
Duty Cycle
.................................................. Receive :
100% Transmit : 100% (100% @25W)
Frequency Stability .....................................
Less than ± 0.00015% –30°C to +60°C
Antenna Impedance ................................... 50Ω
Operating Temperature Range ................... –30°C to +60°C
Dimensions .................................................
483 W x 88 H x 340 D mm
Weight
........................................................ 9.7kg
RECEIVER (Measured by ETS 300 086)
Sensitivity
................................................... 0.45μV
Adjucent Channel Selectivity ..................... 83dB
(±25kHz) 75dB (±12.5kHz)
Intermodulation .......................................... 72dB
Spurious & Image Rejection ....................... 90dB
Audio Output (Ext. Speaker) ....................... 4W at 4Ω
less than 5% distortion
Audio Distortion (Ext. Speaker) .................. Less than
2.5% at 1000Hz
Band Spread ............................................... 5MHz
TRANSMITTER (Measured by ETS 300 086)
RF Power Output ........................................ 40W
adjustable to 25W (100% duty @25W)
Modulation Limiting .................................... ±
5kHz at ±25kHz ± 2.5kHz at ±12.5kHz
Spurious Emission ......................................
–36dBm ≤ 1GHz –30dBm > 1GHz
FM Noise (EIA) ...........................................
25kHz : 50dB 12.5kHz : 45dB
Modulation Distortion ................................. Less
than 3% at 1000Hz
Microphone Impedance ............................. 600Ω
Band Spread ...............................................
30MHz

These manuals are available for the above equipment:

Kenwood -- TKR-850 -- Service Manual
File name Kenwood-6896-Manual-Page-1-Picture
Manual Type Service Manual
Pages 71
Size 5.70 Mbytes (5977064 Bytes)
Language english
Revision
Manual-ID/Number B51-8557-10 (N) 1233
Date May 2001
Quality Electronic document, no scan, very well readable.
Upload date
MD5 f71a19761c6a314ba58f65816a4c45e8
Downloads 140 since 15 June 2015
Information
This Service Manual was revised based on the service
manual as per parts No. B51-8557-00, in order to include
new variants with the following destination codes : K3.

GENERAL .................................................. 2
SYSTEM SET-UP ...................................... 2
OPERATING FEATURES .......................... 3
REALIGNMENT....................................... 11
INSTALLATION ....................................... 13
MODIFICATION....................................... 15
DISASSEMBLY FOR REPAIR ................. 17
CIRCUIT DESCRIPTION .......................... 18
SEMICONDUCTOR DATA ...................... 24
DESCRIPTION OF COMPONENTS ........ 26
PARTS LIST ............................................. 28
EXPLODED VIEW.................................... 39
PACKING ................................................. 41
ADJUSTMENT ........................................ 42
TERMINAL FUNCTION ........................... 49
WIRING.................................................... 53
PC BOARD VIEWS
RX PLL/VCO (X58-4800-XX) .............. 55
TX PLL/VCO (X58-4810-XX)............... 56
DISPLAY UNIT (X54-3330-20) ............ 57
FINAL UNIT (X45-3630-XX) ................ 61
TX-RX UNIT (X57-6270-XX) (A/2)...... 67
TX-RX UNIT (X57-6270-XX) (B/2) ...... 73
SCHEMATIC DIAGRAM.......................... 79
BLOCK DIAGRAM................................... 91
KES-4 (EXTERNAL SPEAKER) ............... 94
SPECIFICATIONS .................................... 95

SCOPE OF THIS MANUAL
This manual is intended for use by experienced technicians
familiar with similar types of commercial grade communications
equipment. It contains all required service information
for the equipment and is current as of this publication
date. Changes which may occur after publication are
covered by either Service Bulletins or Manual Revisions,
which are issued as required.
Kenwood-6896-Manual-Page-1-Picture
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