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Icom IC-1271A User Manual

Icom IC-1271A
190 pages
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Icom IC-1271A Specifications

General IconGeneral
Frequency Range1240-1300 MHz
ModeSSB, CW, FM
IF Rejection70 dB
Image Rejection70 dB
Spurious Rejection70 dB
Power Supply13.8 V DC
Output Power10 W
Receiver Sensitivity0.25 µV

Summary

Section 1 Specifications

1-2 Transmitter

Detailed specifications for the transmitter section, covering output power and modulation.

1-3 Receiver

Detailed specifications for the receiver section, including intermediate frequencies and sensitivity.

Section 2 Inside and Outside Views

2-1 Front Panel

Identification and description of controls and indicators on the front panel of the transceiver.

2-3 Rear Panel

Identification of connectors and controls located on the rear panel of the unit.

Section 3 Block Diagram

3-1 Block Diagram

A functional block diagram illustrating the overall circuit structure and signal flow of the transceiver.

Section 4 Circuit Description

4-1 Transmit/Receive Switching Circuit (PA Unit)

Explanation of the circuit responsible for switching between transmit and receive modes in the PA unit.

4-1-2 RF Filter (RF Unit, RF Mix Unit)

Description of the RF filter circuits within the RF and RF Mix units.

4-1-3 IF Frequency Circuit (IF Unit)

Detailed description of the Intermediate Frequency (IF) circuitry in the IF unit.

Section 5 Mechanical Parts and Disassembly

5-1 Frame Disassembly

Step-by-step instructions for disassembling the main frame of the transceiver.

5-2 Front Panel Disassembly

Procedures for removing and disassembling the front panel components.

5-3 Rear Panel Parts Disassembly

Instructions for disassembling components located on the rear panel of the unit.

Section 6 Maintenance and Adjustment

6-1 Preparation Before Servicing

Essential safety precautions and preparation steps before performing any maintenance or adjustments.

Section 7 Voltage/Circuit Diagrams

Section 8 Board Layouts

Section 9 IC Specification

Section 10 Parts List

IC-1271A Schematic Diagram

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