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General| Type | Mobile Transceiver |
|---|---|
| Frequency Range | 144-148 MHz |
| Mode | FM |
| Voltage | 13.8 VDC |
| Sensitivity | 0.2 µV (12 dB SINAD) |
| Current Consumption | 1.5 A (Receive) |
Details the manual's coverage of theoretical, physical, mechanical, and electrical characteristics.
Information on obtaining service assistance and ordering replacement parts.
Essential safety warnings and guidelines for servicing the transceiver.
Covers frequency coverage, mode, memory channels, antenna impedance, power supply.
Details output power, modulation system, frequency deviation, and spurious emissions.
Outlines receiver system, intermediate frequencies, sensitivity, selectivity, and audio output.
Identification of display elements like frequency readout, indicators, and channel numbers.
Locates and names all controls and connectors on the front of the transceiver.
Identifies the power connector, external speaker jack, and antenna connector.
Shows the physical arrangement of components on the main circuit board.
Displays the physical arrangement of components on the RX circuit board.
Illustrates the main functional blocks and their interconnections for transmission and reception.
Explains the antenna switching, RF, IF, squelch, and AF circuits within the receiver.
Covers microphone amplifier, modulation, drive, power amplifier, and APC circuits.
Describes the phase-locked loop, VCO, reference oscillator, and charge pump circuits.
Explains CPU port allocations, key matrix, and other logic functions for operation.
Provides illustrated steps for disassembling the front panel assembly.
Details the procedure for disassembling the internal frame and chassis components.
Shows connector locations and relationships between the Main Unit and EF Unit.
Illustrates connector locations and relationships between the RX Unit and EF Unit.
Covers pre-servicing steps, safety warnings, and version differences.
Step-by-step guide for adjusting PLL lock voltage and reference frequency.
Instructions for adjusting receiver sensitivity and S-meter calibration.
Steps for adjusting transmitter output power and frequency deviation.
Shows component placement, IC pinouts, and transistor configurations on the EF Unit.
Details component placement and IC pinouts for the Main Unit (A/E models).
Details component placement and IC pinouts for the Main Unit (H model).
Shows component placement and IC pinouts for the RX Unit.
Comprehensive list of part numbers for EF Unit components.
Comprehensive list of part numbers for Main Unit components.
Comprehensive list of part numbers for RX Unit components.
Explains the circuit operation of the UT-40 Tone Squelch Unit.
Provides the voltage and circuit schematic for the UT-40 Tone Squelch Unit.
Shows component placement on the UT-40 Tone Squelch Unit board.
Illustrates the functional blocks of the UT-40 Tone Squelch Unit.
Lists the part numbers for the UT-40 Tone Squelch Unit.
Shows voltage readings at various points in the EF and Main Units.
Illustrates voltage readings at various points in the RX Unit.
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