Specifications - Kenwood TM-281A Service Manual

TM-281A
GENERAL
Frequency Range
TX .................................................................................. K,M4: 144~148MHz
RX ................................................................................. K,M2,M3: 136~174MHz
Mode ................................................................................ F3E (FM)
Antenna Impedance ......................................................... 50Ω
Usable Temperature Range .............................................. –20°C~+60°C (–4°F~+140°F)
Power Supply ................................................................... 13.8V DC±15% (11.7~15.8V)
Grounding Method ........................................................... Negative ground
Current
Transmit (max.) ............................................................. K,M2,M3: 14A or less
Receive (at 2W output) ................................................. 1.0A or less
Frequency Stability (–20°C~+60°C) .................................. Within ±2.5ppm
Dimensions (W x H x D projections not included) ............ 160 x 43 x 126 mm / 6.30 x 1.69 x 4.69 in
Weight .............................................................................. Approx. 1.13kg / 2.5lb
RECEIVER
Circuitry ............................................................................ Double conversion superheterodyne
Intermediate Frequency (1st / 2nd) .................................. 49.95MHz / 450kHz
Sensitivity (12dB SINAD) .................................................. Wide: 0.18µV or less
Selectivity
–6dB .............................................................................. Wide: 12kHz or more
–60dB ............................................................................ Wide: 30kHz or less
Squelch Sensitivity ........................................................... 0.1µV or less
Audio Output (8Ω, 5% distortion) ..................................... 2W or higher
Audio Output Impedance ................................................. 8Ω
TRANSMITTER
Power Output
High ............................................................................... K,M2,M3: 65W
Low ............................................................................... K,M2,M3: Approx. 25W
Modulation ........................................................................ Variable reactance modulation
Spurious Emissions .......................................................... –60dB or less
Maximum Frequency Deviation ........................................ Wide: ±5kHz
Audio Distortion (at 60% modulation) .............................. 3% or less
Microphone Impedance .................................................... 600Ω
Note: All specifi cations (General, Transmitter and Receiver) are guaranteed within the
amateur radio band.
Guaranteed frequency range ............................................ 144~148MHz

SPECIFICATIONS

2967-3, Ishikawa-machi, Hachioji-shi, Tokyo, 192-8525 Japan
P.O. BOX 22745, 2201 East Dominguez Street, Long Beach,
CA 90801-5745, U.S.A.
6070 Kestrel Road, Mississauga, Ontario, Canada L5T 1S8
Rembrücker Str. 15, 63150 Heusenstamm, Germany
Leuvensesteenweg 248 J, 1800 Vilvoorde, Belgium
L'Etoile Paris Nord 2, 50 Allée des Impressionnistes,
Bp 58416 Villepinte, 95944 Roissy Ch De Gaulle Cedex
KENWOOD House, Dwight Road, Watford, Herts.,
WD18 9EB United Kingdom
M2,M3: 136~174MHz
M4: 144~148MHz
M4: 8A or less
Narrow: 0.22µV or less
Narrow: 10kHz or more
Narrow: 24kHz or less
M4: 25W
Narrow: ±2.5kHz
Amsterdamseweg 37, 1422 AC Uithoorn, The Netherlands
Via G. Sirtori, 7/9 20129 Milano, Italy
Carretera de Rubi, 88 Planta 1 A 08174 Sant Cugat del Vallès
Barcelona, Spain
Talavera Business Park Building A, 4 Talavera Road,
North Ryde NSW 2113 Australia
Suite 2504, 25/F, Tower 2, Nina Tower, No. 8 Yeung Uk Road,
Tsuen Wan, New Territories, Hong Kong
1 Ang Mo Kio Street 63, Singapore 569110