21-533.fm Page 3 Thursday, August 5, 1999 3:47 PM

CONTENTS

Measuring SWR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Connecting the Meter . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Calibrating the Meter/Measuring SWR . . . . . . . . . . . . . 5

Interpreting SWR Readings . . . . . . . . . . . . . . . . . . . 8

Improving SWR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Measuring Field Strength

10

Preparing the Antenna Site

11

Calibrating the Meter/Measuring Field Strength

13

Using Field Strength Readings to Tune Your Radio

 

and Antenna

17

Care and Maintenance

19

Schematic Diagram

21

Specifications

22

3

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Radio Shack 21-533 owner manual Contents