DRAKE R-4C Especificaciones descargar pdf (Pagina 5)

CHAPTER I

INTRODUCTION

1.1. GENERAL DESCRIPTION.

The R-4C Receiver is a triple conversion super-

heterodyne receiver designed for optimum recep-

tion of all types of amateur radio communications.

It provides complete coverage of the 80, 40, 20,

and 15 meter amateur bands and 28.5 to 29.0 MHz

of the 10 meter band with the crystals supplied.

Additional/ coverage of 500 kHz segments between

1.5 and 30 MHz is possible with the addition of

accessory range crystals. Sockets are provided for

up to 15 additional crystals. A highly linear

permeability-tuned solid state VFO and premixed

injection give excellent stability and dial calibration

on all bands. Eight pole crystal filter selectivity

combined with passband tuning and a tunable

notch filter provide superior interference rejection.

Three AGC time constants are selectable from the

front panel and a 25 kHz crystal calibrator provides

convenient markers at 25 kHz intervals throughout

the frequency range of the receiver.

1-2. MANUAL COVERAGE.

This manual is presented in 5 chapters and is ar-

ranged for the convenience of the operator and

service technician as follows:

Chapter I

Chapter II

Chapter III

Chapter IV

Chapter V

Introduction (self explanatory).

Installation. Describes the procedures

to be followed prior to operation.

Operation. Illustrates and describes

front panel controls and describes

operation in SSB, CW and AM modes.

Theory of Operation. Describes all

critical circuits and networks.

Maintenance. Provides maintenance

instructions and parts ordering infor-

mation.

1.1

1 2 3 4 5 6 7 8 9 10 ... 28 29

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DRAKE R-4C Especificaciones Pagina 5

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