Radio Shack TRC-447, Service Manual

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SPECIFICATIONS
GENERAL
Channels: 40 (CB Transceiver)
7 (Digital Weather Alert Radio)
Frequency range: 26.965 MHz to 27.405 MHz (CB)
162.400 MHz to 162.550 MHz (WX)
Frequency control: PLL controlled synthesizer
Microphone: Electret condenser type microphone with channel up/down switch
Antenna impedance: 50-ohm
Controls: Volume control with Power on/off Switch
Squelch control for CB
SWR Cal Control for CB
RF gain control for CB
Mic Gain Control for CB and PA
Switches: CH9-NOR-CH19 Lever Switch for CB
S/RF-SWR-CAL Lever Switch for CB
CB-WX-PA Lever Switch
NB-OFF-MON Lever Switch
DUAL-OFF Lever Switch for CB
Channel Rotary Switch for CB and WX
Indicators: Channel number (LED: Green color)
TX/RX (LED:TX-Red/RX-Green Color)
WX/ALERT (LED:Red Color)
Antenna connector: M Type (SO 239)
Jacks: Mic 6 pin Screw Type
EXT. SP 3.5 dia.
PA. SP 3.5 dia.
Dimensions (HWD): 55mm
×
185 mm
×
225 mm
Weight: 1.4 kg
Power supply: 12 V DC rated (13.8 V DC)
Operating temperature range:
−
30 °C to +50 °C (FCC Stability)
Storage temperature range:
−
30 °C to +60 °C (Without damage)
Accessories: Microphone
Microphone hanger with screws
Mounting bracket with screws
DC Power Cord with Fuse
Owner's manual
Measuring Conditions
Power supply voltage: 13.8 V DC
Temperature and humidity: 25
±
5 °C, 50 to 70%
Output load for transmitter: 50 ohm Resistive
Input signal source: 50 ohm SSG
Test input signal: 1 kHz, 30% Modulation (CB)
1 kHz,
±
3 kHz Deviation (WX)
FSK,
±
4.5 kHz Deviation (Digital WX Alert)
Output Load for Receiver: 8 ohm Resistive
Reference Audio Output Power: 0.5 W
Measuring Channel:
CH 20 (CB)
CH 5 (WX)
Each Function Knob Condition.
Volume:
Fully clockwise (FCW)
Squelch: Unsquelched
RF gain: Fully clockwise (FCW)
Mic Gain: Fully clockwise (FCW)
CH9-NOR-CH19: NOR
NB-OFF-MON: OFF
DUAL-OFF: OFF
✽
FCC type acceptance specification for PART 15 and 95.
✽
Frequency tolerance and specification:
±
0.005% from
−
30 °C to +50 °C