CONTENTS
CRITICAL PRECAUTION DURING INSTALLATION 1
Section 1 INTRODUCTION 1
General Description of the ETO 91/3 Amplifier 1
Specifications, ETO 91/3 1
Figure 1 Top View 3
Section 2 PREPARING THE ETO 91fi FOR OPERATION 4
Transformer Installation 4
Inspection of Tubes & Chimneys 4
AC Primary Connections & Amplifier Grounding 4
Operation from 90-130V mains 5
Figures 2-4 Transformer Installation 6
Section 3 AMPLIFIER/STATION INTERCONNECTIONS 7
Coaxial Cable Types & Connectors 7
T/R Control Cable 7
ALC 7
Figure 5 Back Panel 8
Section 4 OPERATION 9
4.1 Control Functions 9
4.2 Tune-up 9
1. Turning On the Amplifier 10
2. Tuning Up for Operation at 1,500 Watts RF Output 11
4.3 Reflected Power Protection 12
4.4 ALC 12
Section5 OPERATING AND MAINTENANCE NOTES 13
Tubes 13
Fuses 13
Electronic Bias Control 14
Plate Overcurrent Relay 14
Preventive Maintenance 14
Section 6 TROUBLESHOOTING HINTS 15
Section 7 DESIGN AND CIRCUIT OVERVIEW 17
SCHEMATICS
19
To Next Page
Loading...
