FEATURES
Your Radio Shack HTA-20 VHF Amplifier with RX Pre-
Amplifier is a high-power, filtered VHF band amplifier
designed for use with transceivers in the 144 - 148 MHz
FM frequency band. When your transceiver transmits, the
amplifier amplifies the transmitted power.
Its features include:
Bipolar Transistor High Power Amplifier - increases a
normal transceiver's output power from 0.5 - 5 Watts up to
30 Watts.
Double Tuned Helical Band Pass Filter - reduces out-
of-band interference by allowing the received frequencies
in the 144 - 148 MHz band to easily enter the receiver but
attenuating all other frequencies.
Low Noise GaAs Field Effect Transistor (FET) Pre-
Amplifier - normalizes insertion loss and provides clean
received signal gain.
Note: This amplifier is designed to be used only with a
high-power antenna.
© 1994 Tandy Corporation.
All Rights Reserved.
Radio Shack is a registered trademark used by Tandy Corporation.
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CONTENTS
Preparation 4
Mounting the Amplifier 4
Installing an Antenna 6
Making the Connections 7
Matching the Antenna's Standing
Wave Radio (SWR) 11
Operation 13
Troubleshooting 14
Maintenance 16
Caring for Your HTA-20 16
Replacing the Fuse 17
Specifications 18
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