Table of Contents
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Amplifier Features ...........................................................................................................3
Power Supply Features ....................................................................................................4
ALS-600PS ..........................................................................................................4
ALS-600SPS ........................................................................................................4
ALS-600PS and ALS-600SPS.............................................................................4
General Information.........................................................................................................4
Amplifier..............................................................................................................4
Power Supply .......................................................................................................5
Export Modifications ...........................................................................................5
Technical Assistance............................................................................................5
Amplifier Circuitry ..........................................................................................................6
Wattmeter Circuits ...............................................................................................6
ALC (Automatic Level Control)..........................................................................6
Thermal Overload ................................................................................................7
Load Fault Indicator.............................................................................................7
SWR Considerations............................................................................................8
Power Supply Circuitry (ALS-600PS) ............................................................................9
Line Voltage Modifications .................................................................................9
High Voltage Section...........................................................................................10
Primary Circuit ....................................................................................................10
Low Voltage Circuits...........................................................................................10
Switching Power Supply Circuitry (ALS-600SPS) .........................................................10
Line Voltage ........................................................................................................10
High Voltage Section...........................................................................................11
Primary Circuit ....................................................................................................11
Low Voltage Circuits...........................................................................................12
Installation .......................................................................................................................12
Amplifier Location...............................................................................................12
Power Supply Location........................................................................................12
Grounding ............................................................................................................12
Power Requirements ............................................................................................13
Table of Contents
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Summary of Contents for AMERITRON ALS-600PS
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Page 1: Table Of Contents
Amplifier Circuitry ......................6 Wattmeter Circuits ....................6 ALC (Automatic Level Control)................6 Thermal Overload ....................7 Load Fault Indicator.....................7 SWR Considerations....................8 Power Supply Circuitry (ALS-600PS) ................9 Line Voltage Modifications .................9 High Voltage Section...................10 Primary Circuit ....................10 Low Voltage Circuits...................10 Switching Power Supply Circuitry (ALS-600SPS) ............10 Line Voltage ......................10... - Page 2 ALS-600 Parts Lists & Schematics .................19 Meter/ALC Board ....................19 PA Board......................21 Output Filter Board ....................22 LED Board ......................24 SWR Detect Board....................25 ALS-600 Chassis Components ................26 ALS-600PS Parts Lists & Schematics ................27 Power Supply Board ....................27 ALS-600PS Chassis Components................28 ALS-600SPS Wiring Diagram..................29...
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Page 3: Amplifier Features
ALC protection. The output and reflected powers are monitored and control the exciter ALC voltage. This helps prevent damage to the amplifier. Front panel ALC control. This unique Ameritron feature allows easy front panel adjustment of the ALC threshold to control power output. -
Page 4: Power Supply Features
This versatile Ameritron feature maintains optimum voltages on the amplifier components for maximum performance and life. Choke input filtering. The ALS-600PS standard power supply uses an input choke to provide a low power factor to the power lines. This reduces the peak currents drawn from the line and improves the voltage regulation of the supply. -
Page 5: Power Supply
100 and 240 volts. Power Supply The ALS-600PS power supply is designed to power the ALS-600 amplifier from 50 to 60 hertz AC power mains that range from 100 to 130 and 210 to 240 volts. The ALS- 600SPS has a terminal strip where the AC voltages can be 120 or 240 50/60 Hz. -
Page 6: Amplifier Circuitry
AMERITRON 116 Willow Road Starkville, MS 39759 Tel: (662) 323-8211 Fax: (662) 323-6551 AMPLIFIER CIRCUITRY Wattmeter Circuits The BIAS/WM/ALC board contains the peak power detector circuits. The rear panel directional coupler connects to IC101D/C. IC101D/C drives Q101/102 to charge C103/106 to the peak voltage from the directional coupler. C103/106 is lightly loaded by IC101A/B and R103/107. -
Page 7: Thermal Overload
The ALC circuit can be used to reduce power by any amount on constant amplitude carrier modes such as RTTY or FM. The ALC cannot cause modulation distortion or pumping on these modes. Never use the ALC to control the level of AM transmissions. Using the amplifier's ALC circuit to control AM output power will cause pumping of carrier amplitude on AM transmissions during modulation. -
Page 8: Swr Considerations
To reset a "LOAD FAULT" indication: 1. Determine and correct the cause of the problem. 2. Place the amplifier "STANDBY-OPERATE" switch to "STANDBY" and then back to "OPERATE". The load fault detector circuit is located on the output filter board and measures the reflected power presented by the output filter network and the SWR directional coupler. -
Page 9: Power Supply Circuitry (Als-600Ps)
ALS-600PS POWER SUPPLY CIRCUITRY (ALS-600PS) Line Voltage Modifications The line input voltage of the ALS-600PS can be changed by moving jumper wires on the power supply printed circuit board to new locations. The ALS-600PS is wired for standard 120 Vac operation unless otherwise indicated. -
Page 10: High Voltage Section
High Voltage Section The high voltage section of the ALS-600PS uses a full wave bridge rectifier. DC filtering is accomplished with a large swinging choke (T1) and a high quality computer grade capacitor (C5). A pair of 100 ohm resistors (R5,6) absorb enough bleeder current to prevent the output voltage from soaring under low load currents. -
Page 11: High Voltage Section
Warning: Never remove the cover of this unit while it is connected to the power line. Refer to the drawing of the terminal block for the proper location of the primary wiring. The 120 position will allow the power supply to work between 90 to 135 Vac. The 240 position will allow the power supply to work between 185 to 260 Vac. -
Page 12: Low Voltage Circuits
Caution: The choke in the power supply emits strong magnetic fields. Never place magnetic tapes, computer disks or other magnetic sensitive devices within 18 inches of the cabinet of the ALS-600PS. Grounding The station ground buss should be connected to a good earth and RF ground. Use the heaviest and shortest connections possible. -
Page 13: Power Requirements
If the no load output voltage exceeds 65 Vdc you must change the input line voltage of the ALS-600PS. Refer to the "Line Voltage Modifications" section in this manual. The ALS-600SPS no load voltage should stay within .1 volt of 50 volts. - Page 14 5. Connect the ALC jack to the exciter ALC terminals with a shielded audio type cable and standard phono connector. 6. Connect the female power connector from the ALS-600PS/SPS supply to the multi- pin male connector on the ALS-600 rear chassis.
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Page 15: Operation
OPERATION This amplifier is equipped with a switch on the front of the Amplifier's Power Supply labeled Normal/RTTY. This switch is used in the normal position for SSB and CW operation. The RTTY position is used for continuous carrier modes. This position will limit the voltage to about 42Vdc no load. -
Page 16: Cw Operation
SWR all play important roles in determining the transmit time limit on high duty cycle modes. To minimize noise, Ameritron uses only enough fan speed to cool this amplifier for typical amateur usage. If heavy duty cycle operation is planned the following guidelines should be followed. -
Page 17: Drive Power Requirements
3. Place the power switch in the ON position. The meter lamps should light and the power supply fans and the amplifier should start. 4. Check the voltage on the power supply meter. The ALS-600PS voltage should be between 55 and 65 volts at this step. ALS-600SPS should be between 4.9 to 5.1 volts at this step. -
Page 18: Periodic Maintenance
8. The ALC control is usually properly adjusted if the ALC LED just flashes when the desired peak output power is reached. The audio or power output control on the exciter can be adjusted to control how "heavily" the ALC is used. The higher the exciter power (gain) control is adjusted the more compression the ALC circuit provides. -
Page 19: Als-600 Parts Lists & Schematics
ALS-600 PARTS LISTS & SCHEMATICS Meter/ALC Board 50-0600-1 Designator Description Part number C101,102,104,105,109, 107,112-115,117-123 .01 uF 50V disc 200-0416 C103,106 2.2 uF 50V radial lead electrolytic 203-0225 C108,116 47 uF 50V tantalum 203-0530 C110,111 not used D101 not used D102-105,107 1N34A diode 300-0346 D106... -
Page 21: Pa Board
PA Board 50-0600-2 Designator Description Part Number C201-203,217 not used C204-207,209-212 .1 uF 50V disc 200-0745 C208 470 pF 500V DM 15 208-5440 C213,214,220-226 .33 uF 100V multiplayer 205-1334 C215 47 uF 100V mylar 201-1474 C216 100 uF 100V radial lead electrolytic 203-1007 C218,219,232,233 360 pF 500V... -
Page 22: Output Filter Board
Output Filter Board 50-0600-3 Designator Description Part Number C301,308 not used C302,307 180 pF* 1000V CDV-30 208-6181 C303,309 270 pF* 1000V CDV-30 208-6271 C304,310 360 pF* 1000V CDV-30 208-6361 C305,311,319 680 pF* 1000V CDV-30 208-6681 C306,312,317 1500 pF* 1000V CDV-30 208-6152 C313,314 160 pF* CDV-30... -
Page 24: Led Board
LED Board 50-0600-4 Designator Description Part Number CR401 Green LED 320-0500 CR402 Yellow LED 320-0300 CR403 Red LED 320-0522-1 J401 10 pin header 612-0110 R401 470 ohm 1/4 watt 100-2470 R402 1K potentiometer 105-1301... -
Page 25: Swr Detect Board
SWR Detect Board 50-0600-5 Designator Description Part Number C501,502 150 pF 1KV disc cap 200-2150 C503 not used C504 33 pF 1KV Disc 200-2033 C505,506 .01 uF 50 Vdc 200-0416 C507 3-12 pF 500V TrimCap 200-0416 D501,502 1N34A or equiv. 300-0346 R501 3.3K 1/4 watt... -
Page 26: Als-600 Chassis Components
ALS-600 Chassis Components Designator Description Part Number 4.5" fan 410-3138 for B1 fan filter screen 410-4600 Cl-C5 .01 50V disc capacitor 200-0416 C6-C7 .01 250Vac capacitor 200-2122 .01 KV disc capacitor 200-2121 J1,J2 SO-239 jacks 610-2126 J3-J5 phonojacks 600-1225 Power connector plug 610-5012 M1a, M1b 1000W/250W cross needle meter... -
Page 27: Als-600Ps Parts Lists & Schematics
ALS-600PS PARTS LISTS & SCHEMATICS Power Supply Board 50-0600-6 Designator Description Part Number C603 2200 uF 25V radial lead 203-0207 C604 220 uF 25V radial lead 203-0565 D601-603 1N4007 or equiv. 300-0266 F601 2 amp slow blow NIDL type 755-1102... -
Page 28: Als-600Ps Chassis Components
ALS-600PS Chassis Components Designator Description Part Number 3" muffin fan 410-3583 for B2 fan guard 410-4584 15000 uF 80 Vdc capacitor & 203-0680 mounting bracket C3,4 .01 uF 250 Vac disc capacitor 200-2122 50 amp bridge rectifier 300-9646 F601 2 amp slowblow IvIDL type... -
Page 29: Als-600Sps Wiring Diagram
ALS-600SPS WIRING DIAGRAM VOLT CURRENT LAMP RED/WHT B15 +14V BLUE BLUE B12 -14V .01 uF .01 uF J1.2 J1.3 J1.4 FROM J1.5 CABLE J1.6 J1.7 J1.8 BLUE J1.11 .01uF RELAY 1 B1 AC/N .01uF AC CORD 10 OHM 10 WATT .01uF YELLOW B2 AC/L...
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