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TABLE OF CONTENTS



Section 1 GENERAL INFORMATION ..........................
1


1-1 Introduction

1

General
Specifications
2

Receiver Specifications ............................
3

Transmitter Specifications
3

Model 220-CS Power Supply Console Specifications .........
4

Model 200-PS Portable AC Supply .....................
4

Rechargeable Battery pack
5
Section 2 INSTALLATION ..................................
6

2-1 Introduction
6

2-2 General Information ..............................
6

2-22 Mobile Installations ...............................
9

2-28 Fixed Station Installations ..........................
13

2-29 Antennas
13

2-33 Fixed Station Antennas
14
Section 3 OPERATION ......................................
15

3-1 Introduction ...................................
15

3-2 Controls ......................................
15

3-3 Power Supply On/Off, Mobile Operation .................
15

3-4 Power Supply On/Off, 220-CS/200-PS ..................
15

3-5 Function Switch
15

3-6 A. F.Gain .....................................
15

3-7 R. F.Gain .....................................
15

3-8 Band Selector and Tuning Dial, Model 210X ..............
15

3-9 Band Selector and Tuning Dial, Model 215X
17

3-10 Dial Set .......................................
17

3-11 Carrier Balance
17

3-12 S-Meter Zero ...................................
17

3-13 Crystal Calibrator ................................
17

3-14 Proper tuning od Single Sideband Signals
17

3-15 Voice Transmission ...............................
17

3-16 Modulation Level
18

3-17 ALC.........................................
18

3-18 CW Transmission
18

3-19 Heat Sink .....................................
18
Section 4 CIRCUIT THEORY ................................
20

4-1 Introduction
20

4-2 Receiver Input Circuit
20

4-3 Sensitivity .....................................
20

4-4 Selectivity .....................................
20

4-5 Oscillator Switching ..............................
20

4-6 Transmitter Broadband Circuitry
24

4-7 Receiver Broadband Circuitry
24

4-8 Alignment and Troubleshooting ......................
24

4-9 Voltage Charts ..................................
24

4-10 Signal Frequency Ranges and Local Oscillator Frequencies .....
25

4-11 PC-100C - First Mixer/First I.F. Amplifier ............... 26

4-12 PC-200C Second I.F. Amplifier, Second Mixer, Mic. Amp.
S-Meter
Amp.
..................................
28

4-13 PC-300D - Receiver Audio, Oscillator Switch .............
30

4-14 PC-500D/520A - Pre-Amplifier, Driver, Power Amplifier,

SWR Protect ...................................
32

4-15 PC-400C VFO Board and Tuning Circuits ...............
34

4-16 PC-600 Carrier Oscillator, Buffer Amplifier .............
36

4-17 PC-800C/1200 Receiver Input Tuning .................
38

4-18 PC-820 100 kHz Crystal Calibrator ................... 41


Section 5

4-19 PC-900C Transmitter Input Tuning ................. 42
4-20 PC-1010/1020 Low Pass Filters ................... 44
4-21 PC-1100A SWR Bridge, Antenna Relay .............. 46
ACCESSORIES .................................... 47
5-1 Model PC-120 Noise Blanker ....................... 47
5-2 Model l0x Crystal Oscillator ....................... ...49
5-4 Model VX-5 VOX .............................. 52
5-5 Model DD-6 Digital Dial .......................... .52



LIST OF ILLUSTRATIONS


Figure


1-1
Atlas Model 21 Ox Illustrated with Optional 220-CS AC Console
......... 1
2-1
Remote CW Transmit Switch for Atlas Transceivers
......... 8
2-2
Linear Amplifier connections for Atlas Transceivers
......... 10
2-3
Deluxe Plug-In Mobile Mounting Kit Installation
......... 11
2-4
Mobile Bracket Kit Installation ......................
......... 11
2-5
D.C. Power Connections ..........................
......... 12
2-6
Model 220-CS/200-PS Schematic Diagram ...............
......... 14
3-1
Front Panel of ATLAS 210x ........................
......... 16
3-2
Rear Panel of ATLAS 210x/215x ....................
......... 16
4-1
ATLAS 210x/215x Modular Design and Plug-in P.C. Boards . . .
......... 21
4-2
ATLAS 210x/215x Block Diagram ...................
......... 22
4-3
Crystal Ladder Filter Selectivity Characteristics ...........
......... 23
4-4
PC-100C Schematic Diagram ........................
......... 27
4-5
PC-200C Schematic Diagram ........................
......... 29
4-6
PC-300C Schematic Diagram ........................
......... 31
4-7
PC-500D/520A Schematic Diagram ...................
......... 33
4-8A
Model 210x PC-400C Schematic Diagram ...............
......... 35
4-8B
Model 215x PC-400C Schematic (tuning section only) .......
......... 35
4-9
PC-600 Schematic Diagram .........................
......... 37
4-10A
Model 210x PC-800C/1200 Scliematic Diagram ...........
......... 39
4-10B
Model 215x PC-8000/1200 Schematic Diagram ...........
......... 40
4-11
PC-820 Crystal Calibrator Schematic Diagram
......... 41
4-12
PC-9000 Transmitter Input Tuning Schematic Diagram ......
......... 43
4-13
PC-1010/1020 low Pass Filter Schematic Diagram .........
......... 45
4-14
PC-1100A SWR Bridge, Antenna Relay Scliematic Diagram . . .
......... 46
5-1
PC-120 Noise Blanker Schematic Diagram ...............
......... 48
5-2
Model l0x Crystal Oscillator ........................
......... 49
5-3
Model 10X Crystal Oscillator Schematic Diagram
......... 50
5-4
Model MT-1 Transformer installation
......... 51
5-5
Model DD-6 Digital Dial ...........................
......... 52
5-6
Model 210x/215x Chassis Wiring .....................
inside back cover


Figure 1-1. Atlas Model 210x Illustrated with Optional 220-CS AC Console

SECTION 1 GENERAL
INFORMATION
1-1. INTRODUCTION

The Atlas 210x Transceiver is designed for single sideband and CW communications in the 10, 15, 20, 40, and 80
meter amateur radio bands. The Atlas 215x covers 15, 20, 40, 80, and 160 meters. They employ all solid state
circuitry, with modular construction. The conservative 200 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, California, 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
International, is considered to be one of the foremost solid state engineers in the world, effectively proved by the
rapid growth of Southcom International in the military and commercial radio markets of the United States, as well
as many other countries.
The high performance and reliability of the Atlas transceiver 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 active 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 transceiver.
73 Herb Johnson W6QKI President GENERAL SPECIFICATIONS
BAND COVERAGE:

ATLAS 21 Ox: Covers 80, 40, 20, 15, and 10 meter
bands, with internal VFO ranges as follows:
3500- 4000kHz
7000- 7500kHz
14000-14500 kHz
21000-21500 kHz
28400 - 29400 kHz
NOTE: The 10 meter band on the 210x may be easily
owner adjusted to cover any 1000 kHz portion of the
band.
ATLAS 215x: Covers 160, 80, 40, 20, and 15 meter
bands, with internal VFO ranges as follows:
1800




2100kHz
3500 4000kHz
7000 7500kHz
14000
14500kHz
21000 21500 kHz
FREQUENCY CONTROL;

Highly stable VFO common to both receive and
transmit modes.
FREQUENCY READOUT:

Dial scale calibrated in 5 kHz increments on all bands
except 10 meters, where increments are 10 kHz.
Tuning knob skirt provides 1 kHz increments on all
bands except 10 meters, where increments are 2 kHz.
EXTERNAL FREQUENCY
CONTROL:

Rear socket provides for plug-in of external VFO or
crystal oscillator accessory for separate control of
transmit and receive frequencies, or for network and
MARS operation.
EXTENDED FREQUENCY RANGE WITH
CRYSTAL OSCILLATOR:

When the model lOx external crystal oscillator
accessory is used, frequency ranges are as listed in the
following charts:
1800 - 3000 kHz (Model 215x only)
3000- 5200kHz
5800 - 10000 kHz

13800

14900kHz
20600 21600 kHz
Note: The Model l0x will not operate on the 28.0
MHz band.
CIRCUIT DESIGN:

All solid state, 4 IC's, 18 transistors, 31 diodes. Single
conversion, 5520 kHz I.F.
MODULAR CONSTRUCTION:

Includes plug-in circuit boards for ease of
maintenance.
PLUG-IN DESIGN:

Transceiver plugs into the Deluxe Mobile Mounting
Bracket, or into the optional 220-CS power supply
console, making transfer or removal a simple
operation. All connectors are standard: SO-239
antenna jack, 1/4 in. phone jacks for Mic., CW key,
external speaker or headphones, and linear amplified
cont