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Icom IC-729 Service Manual

Icom IC-729
80 pages
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Icom IC-729 Specifications

General IconGeneral
ModeSSB, CW, AM
Weight5.5 kg
Voltage13.8 V DC
IF RejectionMore than 70 dB
TypeHF Transceiver
Power Output10-100W (SSB/CW), 10-40W (AM)
Receiver Sensitivity0.16 μV (10 dB S/N)
Current Drain20 A (max)
Image Rejection70 dB
Spurious Rejection70 dB

Summary

DANGER - Safety Precautions

SECTION 1 SPECIFICATIONS

SECTION 3 CIRCUIT DESCRIPTION

Receiver Circuits

Details the reception signal path, including filters, mixers, IF stages, and noise blanker.

Transmitter Circuits

Describes the signal path from microphone input to RF output, including keying and modulation.

PLL Circuits

Explains the Phase-Locked Loop system for frequency synthesis and control.

SECTION 4 ADJUSTMENT PROCEDURES

Preparation and Test Equipment

Lists required test equipment and connection diagrams for servicing the transceiver.

PLL Adjustment Procedures

Guides through adjusting DDS clock, reference frequency, lock voltages, and output levels.

Receiver Adjustment Procedures

Details adjustments for BFO frequency, PBT, sensitivity, and IF trap.

Transmitter Adjustment Procedures

Covers adjustments for idling current, SWR detection, transmit gain, and output power.

SECTION 8 BLOCK DIAGRAM

SECTION 9 VOLTAGE DIAGRAMS

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