Atlas Radio Atlas 180 User Manual

1
INTRODUCTION
The Atlas 180 Transceiver is designed for single
sideband and CW communications in the 20, 40,
80 and 160 meter amateur radio bands. It employs
all solid-state circuitry, with modular construction.
Its conservative 180 Watt power input rating will
provide world-wide communications from fixed,
portable or mobile installations.
Atlas Radio Inc. is licensed by Southcom
International, Inc. of Escondido Calif.,
manufacturers of military and commercial radio
equipment. With this agreement Atlas Radio is
able to bring the most advanced, state-of-the-art
circuit designs to the amateur radio market. Les
Earnshaw, founder and director of R & D at
Southcom is considered to be one the foremost
solid state engineers in the world, effectively
proven by the rapid growth of Southcom
International in the military and commercial
markets of the United States as well as many
other countries.
The high performance and reliability of
the Atlas 180 is enhanced by the finest
craftsmanship, and a most thorough quality
control program. Our staff is made up of highly
skilled assembly workers, technicians and
engineers, many of whom are radio hams.
Our service department if and when needed, is
dedicated to making every Atlas owner a
satisfied customer. Speaking for all the gang at
Atlas Radio, we wish you many hours of
operating pleasure with your atlas 180.
73 Herb Johnson W6QKI
Pres., Atlas Radio, Inc.

Atlas Radio Atlas 180 Specifications

General

Brand	Atlas Radio
Model	Atlas 180
Category	Transceiver
Language	English

Summary

Introduction to the Atlas 180 Transceiver

General Specifications

Band Coverage and Frequency Control

Details frequency bands and tuning methods.

Receiver Specifications Overview

Highlights receiver sensitivity, selectivity, and performance.

Transmitter Specifications

Circuit Design and Power Rating

Details broadband design and power output.

Emission, Keying, and Controls

Explains emission types, keying, and transmit controls.

Special Circuit Features

Receiver Input and Sensitivity

Explains the receiver's no-preamplification design and sensitivity.

Selectivity and Oscillator Switching

Details crystal filter selectivity and unique oscillator switching.

Mobile Installation Guide

Installation Precautions and DC Connections

Advises on precautions and DC power connection.

Mobile Noise Suppression

Discusses common automotive noise and suppression methods.

Deluxe Plug-In Mobile Mounting Kit

Mounting Arrangements and Cable Installation

Shows mounting options and DC cable connection.

Optional Safety Fuse

Recommends installing a fuse near the battery for safety.

Model AR-117/AR-230 Power Supply Specs

Microphone and VOX Operation

Details microphone types and VOX activation.

Atlas 180 Operation and Connections

Linear Amplifier Connections

Details rear panel layout and auxiliary socket pinout.

Operation Controls: Power, Function, and Gain

Explains power switches, mode selection, and gain controls.

Operational Adjustments and Transmission

Band Selector and Tuning Dial Operation

Explains band selection and SSB tuning techniques.

Key Adjustments: Knob Tension, Bias, and Calibrator

Details tuning knob, PA bias, and calibrator adjustments.

Voice Transmission Modes and Modulation

Details PTT/VOX operation and modulation level adjustment.

CW Transmission and Antenna Matching

CW Mode Operation

Explains CW mode, keying, and frequency shift.

Antenna Matching: SWR and Tuners

Discusses SWR, impedance matching, and antenna tuners.

SWR Measurements and Mobile Antennas

SWR Measurement Procedures

Provides step-by-step instructions for SWR measurement.

Mobile Antenna Adjustments and Matching

Highlights mobile antenna tuning and impedance matching.

Atlas 180 Addendum Notes

ALC Control and Linear Amplifier Integration

Explains ALC function and linear amplifier ALC connection.

DC Battery Connections

Battery Connection Procedures and Polarity

Details DC power cable connection and polarity protection.

Voltage Charts for Plug-in Boards

Voltage Measurement Notes and Symbols

Explains voltage symbols, RMS, and measurement conditions.

Plug-in Board Voltage Readings

Lists voltage readings for various plug-in boards.