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Yaesu FT-7B User Manual

Yaesu FT-7B
45 pages
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Table of Contents

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Yaesu FT-7B Specifications

General IconGeneral
Frequency Range80-10 meters
Voltage13.8 V DC
TypeTransceiver
ModesSSB, CW
Tuning Steps100 Hz

Summary

GENERAL

CW OPERATION

AM OPERATION

DIAL CALIBRATION

SPECIFICATIONS

SEMICONDUCTORS

ACCESSORIES

FRONT PANEL CONTROLS

REAR APRON CONNECTIONS

INSTALLATION

MOBILE INSTALLATION

Step-by-step guide for physically installing the transceiver in a mobile environment.

CAUTION

Important safety precautions regarding power connections and polarity.

BASE STATION INSTALLATION

ANTENNA CONSIDERATIONS

OPERATION

ADVANCE PREPARATION

Steps to take before initial operation and testing.

MAIN TUNING DIAL FREQUENCY READOUT

Explains how to read and interpret the frequency displayed on the tuning dial.

OPERATING INSTRUCTIONS

TUNE-UP

SSB OPERATION

TRANSMITTER TUNE-UP

FIX (CRYSTAL CONTROLLED) OPERATION

Clarifier zero setting (VR1701)

How to set the clarifier to zero beat for accurate frequency offsetting.

RF tracking (T1916 - T1925)

Adjusting RF tracking transformers for maximum output on each band.

CIRCUIT DESCRIPTION

RECEIVER

Detailed description of the receiver section's circuitry.

TRANSMITTER

Detailed description of the transmitter section's circuitry.

COMMON CIRCUITS

MAINTENANCE AND ALIGNMENT

CONTROL UNIT (PB-1622)

Details alignment adjustments for the control unit.

MOD/DEM UNIT (PB-1878)

SSB carrier point (TC502, TC503)

Steps to adjust SSB carrier point for proper sideband operation.

CARRIER BALANCE (TX)

Procedure for balancing the transmitter carrier signal.

CARRIER BALANCE (RX)

Procedure for balancing the receiver carrier signal.

IF UNIT (PB-1625)

CW carrier level adjustment (TC401)

Steps to adjust CW carrier level for proper transmission.

S-meter calibration (VR401)

Procedure for calibrating the S-meter for accurate signal strength readings.

LOCAL UNIT

Local oscillator level adjustment

Adjusting the local oscillator for proper frequency mixing.

Premix bandpass filter adjustment (T1902 - T1905)

Aligning premix bandpass filters for optimal spurious response.

PREMIX UNIT (PB-1630)

Premix balance (VR901)

Procedure for balancing the premix stage.

Transmit/receiver frequency bandpass filter adjustment (T1906 - T1915)

Adjusting bandpass filters for flat response across frequencies.

VFO UNIT (PB-1440B-3400)

FIX UNIT (PB-1629)

AM MOD UNIT (PB-1874)

AM ALC UNIT (PB-1937)

CW PEAK FILTER (PB-1882)

RF/MARKER UNIT (PB-1884B)

MIXER UNIT (PB-1631E)

FILTER UNIT (PB-1873A)

IF UNIT (PB-1625E)

MOD/DEM UNIT (PB-1878A)

AF UNIT (PB-1648)

CONTROL UNIT (PB-1622)

NB UNIT (PB-1627D)

PREDRIVE UNIT (PB-1632)

PREMIX UNIT (PB-2044)

FIX UNIT (PB-1629)

VFO UNIT (PB-1440B-3400)

LPF UNIT (PB-1880)

50W PA UNIT (PB-1879A)

AM MOD UNIT (PB-1874)

AM DET UNIT (PB-1875A)

CW PEAK FILTER UNIT (PB-1882)

SW UNIT (PB-1877)

RESISTOR UNIT (PB-2042)

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