Kenwood TH-31A - Manual (Page 4)

2. Specifications
TH-41A/41BT/41E
TH-31A/
31 BT
TH-21A/
21 BT
TH-21E 430MHz
version
440MHz
version
General
Frequency range 430MHz
to
440MHz
440MHz
to
450MHz
220MHz
to
225MHz
144MHz
to
148MHz
144MHz
to
146MHz
Signal type F3 (FM)
Operating tempera­
ture
-20X ~ +50°C
Antenna impedance 50i3
Power supply voltage 5.8V - 10.OV (rating voltage; 7.2V)
Power consumption At reception standby; Less than 30 mA
At transmission (Hi); Less than 650 mA
(Low); About 350 mA
Less than 28 mA
Less than 600 mA
About 300 mA
Dimensions W 57 (65.5) X H 120 (127.5) x D 28 (32) mm
The numbers in the parenthesis include projections.
Weight Approx. 290 g (including antenna and Ni-Cd batteries)
Transmitter section
Output power Hi; 1.0W, Low; approx. 1 50 mW
Modulation system Reactance modulation
Max. frequency de­
viation
±5 kHz
Unwanted reflection Less than -60 dB
Microphone Condenser type
Receiver section
Reception system Double superheterodyne
Intermediate fre­
quency 1st: 21.6MHz
2nd: 455kHz
1 St:
16.9MHz
2nd:
455kHz
1st: 16.3MHz
2nd: 455kHz
Sensitivity S/N more than 26 dB
at -6dB// (0.5 ^V) input S/N more than 28dB at-6dB|t/
(0.5/c/V) input
12 dB SINAD; less than -1 2 dB/i (0.25 //V)
Squelch sensitivity Less than 0.2^V
'’^^0^2^V 1 0.25//V
Selectivity -6 dB at more than 12 kHz
-40 dB at less than 28 kHz
AF output More than 250 mW (8Q load, distortion 10%)
Design and specifications subject to change without notice.