Kenwood TKR-850 Transceiver
Manufacturer:
Model:
TKR-850
Date:
2001
Category:
Group:
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

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Service Manual
Manual type:
Service Manual
Pages:
71
Size:
5.70 Mbytes (5977064 Bytes)
Language:
english
Revision:
Manual ID:
B51-8557-10 (N) 1233
Date:
May 2001
Quality:
Electronic document, no scan, very well readable.
Upload date:
15 June 2015
MD5:
f71a19761c6a314ba58f65816a4c45e8
Downloads:
317
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.

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