EasyManua.ls Logo

Yaesu FRDX-400 User Manual

Yaesu FRDX-400
29 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
Page #1 background imageLoading...
Page #1 background image
Question and Answer IconNeed help?

Do you have a question about the Yaesu FRDX-400 and is the answer not in the manual?

Yaesu FRDX-400 Specifications

General IconGeneral
BrandYaesu
ModelFRDX-400
CategoryReceiver
LanguageEnglish

Summary

GENERAL

SPECIFICATIONS

Detailed technical specifications for the receiver's performance and features.

BLOCK DIAGRAM

PRINCIPLES OF OPERATION

Explanation of the receiver's double conversion superheterodyne design and signal path.

RF AND MIXER CIRCUIT

Description of the antenna signal path through RF amplifier and first mixer stages.

SECOND IF AND DETECTOR CIRCUIT

Details on the second IF stage, mechanical filters, and detector circuits for signal processing.

OSCILLATOR CIRCUITS

CONTROL CIRCUITS

AUDIO AND POWER SUPPLY CIRCUITS

INSTALLATION

CONTROL FUNCTIONS

OPERATIONS

SINGLE SIDEBAND RECEPTION

Step-by-step guide for setting up and operating the receiver for SSB communication.

CW RECEPTION

Instructions for configuring the receiver for optimal CW (Continuous Wave) reception.

AM RECEPTION

Guidelines for setting up and tuning the receiver for AM (Amplitude Modulation) broadcast reception.

TRANSCEIVE OPERATION

MAINTENANCE AND ALIGNMENT

CABINET REMOVAL

Procedure for safely removing the receiver's chassis from its cabinet for internal access.

455 KC IF ALIGNMENT

T-NOTCH FILTER ALIGNMENT

TUNABLE IF ALIGNMENT

VFO DIAL CALIBRATION

BFO ALIGNMENT

HIGH FREQUENCY OSCILLATOR ALIGNMENT

RF CIRCUIT ALIGNMENT

S-METER ZERO ADJUSTMENT

TROUBLE SHOOTING

TUBE AND DIAL LIGHT OUT

Troubleshooting steps for issues where the unit's lights are not functioning.

TUBES LIGHT BUT NO AUDIO

Diagnostic guide for when the receiver powers on but produces no sound output.

AUDIO OK BUT STILL NO OUTPUT

Steps to isolate issues when audio is present but not reaching the output stage.

STATION INTERCONNECTIONS

ACCESSORIES

INSTALLATION OF OPTIONAL ACCESSORIES

FILTER INSTALLATION AND ALIGNMENT

Procedures for installing and aligning optional mechanical filters for different reception modes.

FIX OSCILLATOR UNIT INSTALLATION

FIX OSCILLATOR UNIT ALIGNMENT

Steps for aligning the FIX Oscillator Unit to ensure proper crystal-controlled operation.

FM UNIT INSTALLATION

FM UNIT ALIGNMENT

Procedures for installing and aligning the FM Unit for proper reception.

VHF CONVERTOR UNITS INSTALLATION

VHF CONVERTER UNIT ALIGNMENT

Instructions for aligning VHF converter units to specific frequency bands and crystals.

VOLTAGE MEASUREMENT

RESISTANCE MEASUREMENT

FR-DX-400 PARTS LIST

Related product manuals