Specifications - Kenwood TR-7850 Instruction Manual

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SPECIFICATIONS
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[General]
Semiconductors .................ci sr MPU 1
ICs 19
Transistors 60
FETs 9
Diodes 77
Frequency range .................css isso 144.000 to 147.995 MHz
Frequency synthesizer............................ Digital control, phase locked VCO
NGdO sera ea O FM (F3)
Antenna impedance ...........................s.... 50 ohm
Power requirement .......................cis... 13.8V DC +15%
CrOUNdINO) ixsesiass ir a O Dig Negative
Operating temperature............................. — 20ºCto +5OºC
Currentdralh
ss ses si
alga
0.4A in receive mode with no input signal
9A in HI transmit mode (Approx.)
Less than 3 mA for memory back up (from an external power supply
through the back up terminal)
Less than 2 mA for memory back up (from battery)
DIMCNSIONS spa A 175 mm (6-7/8") wide
64 mm (1-1/2") high
220 mm (8-5/8"") deep
(projections excluded)
CTT | | RR
RD RR
RR
2.2 kg (4.84 Ibs) (approx.)
[Transmitter Section]
RF output power (at 13.8V DC, 5012 load) ..... HI 40 Watts min.
LOW 1 to 15 watts approx. (According to FREQ.)
ModulatóON siso es ari Variable reactance direct shift
Frequency tolerance.......................s... Less than +20 x 10
( — 20ºC— + 50ºC)
Spurious radiation...................ccssss sie HI Less than — 60 dB
LOW Lessthan — 53 dB
Maximum frequency deviation (FM)............. +5 kHz
MICTODHONE ssa
erissras aaa its ana sia
Dynamic microphone with PTT switch, 5009
[Receiver Section]
CIFCUITIV sara sina OD A Double conversion superheterodyne
Intermediate frequency ................................ Ist IF 10.695MHz
2nd IF 45b5kHz
Receiver sensitivity ....................
Better than 0.5uV for 30 dB S/N
Better than 0.2uV for 12dB SINAD
Receiver selectivity .................c
More than 12kHz (— 6dB)
- Less than 24 kHz ( — 60dB)
Spuriour response ........................ccsssee. Better than 60 dB
Squelch sensitivity ....................sc 0.16uV (threshold)
Auto scan stop level...................cc Less than 0.2uV (threshold)
AUdIO OUIDUÊ mussi ssarase pes prniaseda isa ia unas More than 2.0 watts across 8 ohm load (10% dist.)
Note:
Circuit and ratings are subject to change without notice due to developments in technology.