FCC ID: HO82WUALS1406 Linear Amplifier

AMERITRON ALS-1406/S 1200 WATT 160-6 Meter NO TUNE LDMOS-FET AMPLIFIER INSTRUCTION MANUAL WARNING!

NEVER APPLY POWER TO THIS AMPLIFIER WITH THE COVER REMOVED!

CONTACT WITH THE POWER SUPPLY VOLTAGES IN THIS AMPLIFIER CAN BE FATAL!

PLEASE READ THIS MANUAL BEFORE OPERATING THIS EQUIPMENT!

Factory 116 Willow Road Starkville, MS 39759 USA 662-323-8211 Version 0 Printed in the USA Table of Contents AMPLIFIER FEATURES ............................................................................................................................... 4 POWER SUPPLY FEATURES ..................................................................................................................... 4 QUICK START .............................................................................................................................................. 5 Installation and Operation......................................................................................................................... 5 Placement............................................................................................................................................. 5 Wiring........................................................................................................................................................ 5 Power Mains ......................................................................................................................................... 5 Radio and Antenna Connections.......................................................................................................... 6 Operation .................................................................................................................................................. 7 INTRODUCTION........................................................................................................................................... 9 Power Supply............................................................................................................................................ 9 Power Line Requirements .................................................................................................................... 9 Power Supply Location......................................................................................................................... 9 GENERAL INFORMATION......................................................................................................................... 10 Amplifier Overview.............................................................................................................................. 10 INSTALLATION........................................................................................................................................... 11 Installation Clearances ........................................................................................................................... 11 Installation Warnings .............................................................................................................................. 11 Accessory Equipment and Devices.................................................................................................... 11 Installation, Wiring, and Connections ................................................................................................. 11 Safety and Lightning Grounding......................................................................................................... 12 Station RF Ground.............................................................................................................................. 12 Coaxial Line Isolators ......................................................................................................................... 13 INTERCONNECTION WIRING................................................................................................................... 14 FRONT PANEL CONTROLS ...................................................................................................................... 15 AMPLIFIER REAR PANEL ......................................................................................................................... 16 INTERCONNECTIONS............................................................................................................................... 17 Optional Radio Interface Cables ........................................................................................................ 18 OPERATION ............................................................................................................................................... 19 MARS or CAP Operation ........................................................................................................................ 19 Initial Operation....................................................................................................................................... 20 ALC Adjustment...................................................................................................................................... 21 High Duty Cycle Modes .......................................................................................................................... 21 Warning Lights........................................................................................................................................ 22 RF EXPOSURE INFORMATION ................................................................................................................ 22 ALS-1300SPS INTERCONNECT DIAGRAM ............................................................................................. 25 AC Mains Selection ................................................................................................................................ 25 50-ALS600SPS-1B Power Supply Module......................................................................................... 25 50-SPS600-1B Power Supply Module ............................................................................................... 26 ALS-1406 LIMITED WARRANTY ............................................................................................................... 28 Tables Table 1 Warning Alert Codes ........................................................................................................................ 7 Table 2 Optional Radio Interface Cables .................................................................................................... 18 Table 3 Band Frequency Limits .................................................................................................................. 19 Table 4 Warning Lights ............................................................................................................................... 22 Table 5 RF Exposure Distance Chart ......................................................................................................... 23 Table 6 Approximate Antenna Gain for Some Common Antennas ............................................................ 24 Figures Figure 1 Basic Interconnect ........................................................................................................................ 14 Figure 2 Basic Interconnect with Radio Interface Cable............................................................................. 14 Figure 3 Interconnect with Tuner and no KEY LOOP ................................................................................. 14 Figure 4 Interconnect using KEY LOOP ..................................................................................................... 14 Figure 5 Amplifier Front Panel .................................................................................................................... 15 Figure 6 Amplifier Back Panel..................................................................................................................... 16 Figure 7 50-ALS600SPS-1B Line Voltage Jumpers ................................................................................... 25 Figure 8 50-SPS600-1B Line Voltage Jumpers .......................................................................................... 26 Version 0 03-22-2021 DISCLAIMER Information in this manual is designed for user purposes only and is not intended to supersede information contained in customer regulations, technical manuals/documents, positional handbooks, or other official publications. The copy of this manual provided to the customer will not be updated to reflect current data. Customers using this manual should report errors or omissions, recommendations for improvements, or other comments to Ameritron 116 Willow Road, Starkville, MS 39759. Phone:

(662) 323-8211; FAX: (662) 323-6551. Business hours: M-F 8-4:30 CST. Amplifier Features This amplifier provides the following standard features:

160 through 6 meter operation Two conservative linear-service rated, 50-volt dual LDMOS FET transistor packages New push-pull stripline PA layout with exceptional VHF performance Energy-efficient solid-state design greatly reduces heat, <100 watts power line draw on receive Exceptional harmonic suppression Operational in a few seconds, no long filament warm-up time Clean layout with easy-to-service modular construction Quiet variable-speed forced-air cooling system Power module current and voltage meters with LED illumination Accurate PEP Forward and PEP Reflected output power metering Power module balance metering with PA unbalance protection Reflected power protection Thermal overload protection Bandswitch error protection Easy to understand front panel LED indicators for rapid fault-error diagnosis Standard negative-going ALC output with front panel adjustment ALC metering and ALC LED indicator Fully-regulated external power supply Compact size 17.5 deep x 7 high x 10.5 wide Weight amplifier section 23 pounds Power Supply Features Efficient operation from 200 to 260 volts ac (12 amperes typical at full output power). Low standby and receive power drain, typically less than 100 watts. Generator and inverter friendly with acceptable power line frequency range 40 to 400 Hz. Fully regulated current-limited outputs. Step-start to limit stress on power supply components. Exceptional filtering and RFI suppression eliminates receiver birdies common to most SMPS. Compact lightweight design. 4 Quick Start Thank you for purchasing this amplifier system. The ALS-1406 is a 1200-watt nominal PEP output amplifier and power supply system. This amplifier covers 160 to 6 meters. Nominal drive power is 100 watts or less. This system will not and does not operate on the CB band. The ALS-1406 interfaces with most modern amateur radio transceivers, including band data information. Band data connection will require purchasing an Ameritron interface cable for your radio. Carefully unpack this amplifier and power supply. Cabinets and controls can be broken, bent, or dented with rough handling. Please inspect everything for physical shipping damage; this includes cabinets and chassis. Ameritron does not package dented or damaged units. If your unit is damaged or dented, including broken knobs or switches, it is always from handling somewhere between Ameritron and the end user. In the event of cabinet damage or broken controls, please retain all packing materials and containers so damage claims can be resolved. Installation and Operation Placement WARNING: Do not block ventilation holes. Do not expose to water or external heat. This unit is two components, a power supply and an amplifier section. The power supply, within limits of cable length, may be placed out of the way. The amplifier section should be in a convenient location within arms reach of the operating position. Wiring Power Mains 1.) This amplifier requires a 200 to 260 Vac, 50 to 400 Hz, 15-ampere or larger mains supply. This range includes all typical power lines worldwide, including USA 240 volt systems. 2.) The plug is a NEMA 6-15P, 250 maximum Vac at 15 amperes. This is a standard USA 250V plug with a safety ground pin. Do not remove the ground pin. 3.) The amplifiers power supply system contains two 30-ampere 50-volt supplies, one for HV1 and the other for HV2. The supply can be damaged by operation with voltages below 200 volts or above 260 volts. 4.) Larger power wiring will not help performance or power unless amplifier high voltage is unstable. 5.) While not recommended, the power supply can be rewired for 100 to 130 Vac operation. The increase in power line current with reduced power line voltage will limit amplifier power. 5 6.) The ALS-1406 power supply system is voltage regulated. You should see very little change in HV1 and HV2 with amplifier power. Less than 3 volts change from the 50Vdc nominal voltage is normal. 7.) The ALS-1406 has two power supply boards in the power supply. Exceeding safe power supply current on any supply line will force the overloaded supply into shutdown. Power Supply shutdown is reset by turning the main power switch off for a brief time. If the power supply has a permanent overload or the supply has failed, it will not reset. Radio and Antenna Connections WARNING: Forcing connector engagement can result in permanent connector damage. Solder on the outside of center pins or bent pins are primary causes of female connector damage. External solder or bent center pins will permanently damage the female. Do not use Line Isolators on amplifier RF cables. The chassis of the amplifier should be at the same RF potential as all other desk equipment. Shield isolators allow equipment to float to different RF chassis potentials. Different chassis potentials are exactly what we do not want, and isolators on desk coaxial cables encourage different potentials. It is better to cure RF problems outside the operating position whenever possible. 1.) RF connections are through standard UHF female connectors. Use good cables with quality UHF male (PL259) connectors. The output cable must safely handle at least 1200 watts. 2.) Look at the connectors. The amplifiers female connectors have notches on the outer thread edge. The cable males should have protruding tabs on the inner shell beyond the center pin insulator. These tabs and notches prevent unwanted connector rotation. The males tab or tabs must be aligned with the females notches. This interlocking prevents connector rotation. 3.) With a firm handgrip, gradually tighten RF connectors while making sure the male tab interlocks with the amplifiers female connector notch. Do not use excessive force on connectors. Check for proper tightness and seating by wiggling and flexing the cables near the connector and watching for any indications of abnormal male connector movement, and by wiggling the cable while hand tightening the male shell. If done properly, the connector will be solidly locked without need for pliers or other tools 4.) ALC and Relay (keying) connectors are phono females. The phono males from external cables should push directly in with a snug fit. 5.) The Relay line has low-voltage (<14 V) low current (<20 mA). Transmit is enabled by pulling the Relay line to ground with a relay contact or transistor. Read your radio manual. Unless you have a very unusual radio, your radio will directly key the amplifier. 6.) The remote and radio band data connectors are specialized connections. They are for use with Ameritron supplied cables only. 6 Operation This amplifier has alert codes. SWR, PA, TX, and band switch lamps indicate operational faults. Operational faults reset by placing the amplifier in Standby momentarily. The following table applies to faults:

Fault Cause or Cure Warning Light Steady Warning Light Flashing SWR TX Antenna Reflected Power SWR, PA Band Wrong filter PA TX PA FET too hot PA 10M, PA, TX REM, PA Combiner unbalance Illegal 11 meter operation No or wrong band when on remote High antenna SWR or intermittent antenna or feed line connection Exciter or amplifier on incompatible band, filter failure Excessive power for duty cycle or SWR, lack of proper airflow Excessive 27 MHz signal level Defective or improper remote cable, or bad radio band data information Table 1 Warning Alert Codes Before attempting operation:

1.) This amplifier is optimized for a 50-ohm load. Be sure your antenna system 50-ohm SWR is as low as possible. As SWR increases from 1:1, either heat or distortion will increase. Be sure your antenna system, including any lightning protection devices, will safely handle high power. 2.) 3.) Connectors, cables, and antennas must not have loose connections or insulation issues. 4.) Your exciter must be less than 100 watts output. 5.) Power mains should capable of 15 amperes, reasonably stable, and 200 to 260 volts. 6.) The low pass filters cut off just above traditional primary bands. This means primary filters are used on the WARC bands. Some radios do not supply enough band data to know the exact band, so with some radios the amplifier band data displays the next higher primary band above a WARC band. Do not be alarmed if, for example, 15 meters illuminates when 17 meters is selected on some radios. 7.) The amplifier will shut off if an incorrect band is selected, if antenna SWR is too high (even for an instant), if thermal limits are reached, or if there is a catastrophic failure. 8.) The ALS-1406 metering reads peak envelope power on all RF power functions. 7 With proper installation, basic operation is straightforward:

1.) Set the bandswitch to the desired band. This happens automatically in the REM position with a suitable radio interface cable. 2.) Set the exciter or transceiver to the desired power below 100 watts. 3.) Place the standby switch in the operate position. 4.) Transmit, and watching Forward Power metering, be sure power does not exceed 1200 watts on peaks. 5.) For high duty cycle modes and long transmissions, reduce the power. The amplifier will shut down if the FETs reach the maximum safe temperature limits. 8 Introduction The Ameritron ALS-1406 is 1200-watt nominal output, 160 through 6-meter amateur radio band, solid-state amplifier. The ALS-1406 uses two 50-volt, conservatively rated, linear MRFE6VP5600HR6 dual LDMOS FETs. These LDMOS FETs are specifically designed for broadcast power amplifier applications. They provide exceptionally low SSB distortion when compared to other solid-state devices. Fan speed is regulated by temperature sensors; assuring conservative cooling with minimal noise. Nominal driving power is 100 watts or less for 1200 watts output (approximately 11 dB gain) on most bands. The compact 10 wide by 6-1/2 high amplifier package (depth only 18) fits nearly any station configuration. The attractive desktop amplifier unit weighs only 24 pounds. An external 50-volt 50-ampere regulated power supply powers the ALS-1406. The supply is wired for 240 VAC (200-260 VAC, 50-60 Hz, 15 amperes), but can be rewired for 120 VAC operation for lighter duty operation. Power Supply The external power supply for the ALS-1406 is a voltage-regulated current-limited switching supply. It contains 14 volt positive and negative supplies, as well as dual 50-

volt 25-ampere continuous (30-ampere peak) fully current limited supplies. Each PA

(power amplifier) module in the ALS-1406 operates from independent 50-volt modules, giving a total dc supply rating of 2500 watts average power and 3000 watts peak power to the power amplifier modules. Power supply to amplifier interconnections are through a heavy-duty cable using a large Cinch Jones connector. Power Line Requirements This amplifier ships wired for a nominal mains voltage of 230 VAC. Maximum average power-line current at full power output is 12 amperes at 240 volts. Two 250-volt 15-

ampere fuses fuse the power line. The switching power supply automatically adapts to any mains voltage between 200 Vac and 260 Vac, and does not require adjustments or tap changes within that range. Note: 120-volt power mains operation is possible with a reduction in CW or RTTY power. Because average power is very low, SSB operation is unaffected by 120-volt operation. 120-V fuse size is 25-amperes maximum. Power Supply Location Locate the power supply in a convenient ventilated area near the amplifier location. Avoid placing the power supply next to sensitive equipment, such as audio processors, transceivers, or microphones. For safety, ground the wing nut stud on the supply rear to the station ground bus. The station ground bus should comply with National Electrical Codes. NEC and fire protection codes mandate directly bonding of station grounds to the power-line entrance ground. If station ground rods are not bonded to the utility entrance ground, likelihood of equipment or property damage and personal risk increases. 9 General Information Amplifier Overview The Ameritron ALS-1406 is a solid-state, 1200-watt nominal RF output power, 1.8 to 54 MHz amplifier. The ALS-1406 meets or exceeds all FCC requirements governing amateur radio external power amplifiers. The ALS-1406 uses two exceptionally low distortion MRFE6VP5600HR6 dual LDMOS SSB RF power transistors in push-pull. The characteristics of linear high-voltage FETs are very much like those of triode vacuum tubes. While this amplifier will run more than 1200 watts PEP output, linearity might suffer. Ameritron recommends running 1200 watts or less peak power for maximum linearity. If these instructions are followed, this amplifier will have comparable IM performance to the best vacuum tube linear amplifiers. There are multiple temperature sensors on each PA (power amplifier) module are to monitor heat to adjust bias and fan speed. The ALS-1406 will disable the amplifier before the transistors exceed the safe operating temperature limits. Harmonic suppression comes from push-pull operation of linear devices, followed by high-quality 5-pole low-pass filters. Many amplifiers use inexpensive ceramic disc or mica capacitors. Lead inductance of mica or disc capacitors reduces high-order harmonic suppression. This amplifier uses quality multi-layer high voltage chip capacitors. This amplifier greatly exceeds FCC harmonic requirements. HF harmonic suppression typically 10 to 15 times better than FCC mandated suppression levels. Harmonics are practically immeasurable on all television channels. An external low-pass filter has minimal effect with this amplifier. Antenna switching is through a pair of sequenced miniature relays on a plug-in module. This facilitates relay servicing or maintenance. Relay switching time is approximately five to ten milliseconds. The T/R Relay control jack is well within the range of almost any transceiver or radio. The Relay jack has an open circuit voltage of 14 volts, and closed circuit current less than 20 mA. Virtually any modern amateur radio will directly key this amplifier. This amplifier includes full metering using large easy-to-read conventional panel meters. The meters read all critical parameters including forward and reflected peak envelope RF power. 10 Installation Please look your amplifier and power supply over carefully. Observe the air inlet and outlet ventilation holes. Facing the amplifier front panel, the cooling air inlets are on the top left and lower right side, including the right bottom. The warm air outlet is on the lower left side of the cabinet as viewed from the normal operating position (front view). While outlet air will not be particularly warm, it is never a good idea to have warm air blow into heat sensitive equipment, such as transceivers or other power amplifiers. Have the same consideration for your new amplifier and power supply. Be sure the air inlet temperature is not substantially above normal room temperature. Ideally, the air inlet temperatures should be below 32 C or 90 F, although temperatures up to 41 C or 106 F are permissible. If ambient temperatures exceed these limits it might become necessary to reduce duty cycle or power. Warning: Do not block cooling air inlets and outlets!

Never expose the amplifier to water or mist. Installation Clearances The amplifier must have a clear area to the bottom, both sides, and top for proper airflow, and to the rear for interconnection wiring. It is especially important to avoid obstructions that block the air inlet on the top left, as well as both lower sides. Two inches clearance is normally adequate for full ventilation. Keep any papers or loose objects that might impede airflow away from the air inlets and outlets. Locate the amplifier and power supply away from sensitive equipment such as microphones, audio processing equipment, or low level audio or radio frequency amplifiers. Generally, the best location for the power supply is below the operating desk and away from antenna feed lines. This will keep fan noise and any RF coupling to a minimum. The power supply has an air inlet at the rear, and air outlets on the top. The highly efficient power supply produces very little heat, but the inlet and outlet must remain open to normal room temperature air. Installation Warnings Accessory Equipment and Devices One of the most common causes of amplifier failures or erratic fault protection alarms is installation of antenna switches, lightning protection devices, or baluns with lightning spark gaps in high SWR lines. If your antenna system has an SWR high enough to require an antenna tuner, do not use 50-ohm lightning protection devices after the tuner. Installation, Wiring, and Connections The power supply is factory wired for 200 to 260 Vac. It uses a standard NEMA-6-15P 15-ampere 240-volt plug. The round center pin is the safety ground. Do not remove the safety ground. CAUTION! Before connecting the power supply to an electrical outlet, always be sure you have completed the following four steps:

1. Insert the 15-ampere 250V fuses into the two black fuse caps. 11 2. Insert the fuse and cap assemblies into the power supplys fuse holders. The fuses lock in place with a quarter turn. 3. Connect the power supply to the amplifier. 4. Be sure the amplifier power switch is off. Caution! Fuses have both voltage and current ratings. Use only 250V rated fuses in this device. The voltage rating is generally marked on fuses. DO NOT use automotive-type low voltage fuses in any power line application. For 240-volt operation, 15-ampere fast blow fuses are required. Warning: Never insert the power supply cord into the outlet until you have completed the four steps above!

Position the amplifier at or near the desired location on your operating desk so you have access to the rear panel, and connect the rear panel cables. Do not connect the power mains at this time!

Safety and Lightning Grounding The power supply cabinet grounds through a safety ground pin on the power plug. This system depends on a properly wired power outlet. Lightning protection grounds do very little good at the operating desk. Lightning protection grounds belong at the antenna cable entrance to the building. Station ground rods must always be electrically bonded, with low impedance and resistance, to the power line entrance ground. The national electrical code in the USA prohibits isolated ground systems at a dwelling entrance. Isolated ground rods or systems connected to conductors entering a dwelling increase the chances of damage from storms, and increase fire hazard and shock risk. RF grounds generally belong at the antenna, or at the feed line entrance. With the special exception of a small floating counterpoise grounds, RF grounds at or very near the dwelling should bond into the mains ground outside the dwelling. This is especially true with earth contact grounds. There is a ground lug on the amplifier rear panel. This ground lug provides a convenient chassis connection for operating positions with ground bus on the desk. A station ground bus helps ensure desk area equipment cabinets are close to the same electrical potential for radio frequencies and lower. Equipment ground lugs are NOT for independent wires or connections to external ground rods or ground systems from each piece of equipment. They are for connection to a desktop ground bus system, if you prefer to use such a system. Independent wire connections are counterproductive, the opposite of good practices. Never use RF isolators between the amplifier and radio. Never use long independent wires to external ground. Never connect desk equipment to ground rods that are not bonded to the mains ground rod. Station RF Ground Common rumor is that a station equipment ground reduces RFI (radio frequency interference), reduces lightning damage, or improves signal levels. Generally, changes in RFI or signal quality, with the addition or removal of a station ground, indicate an 12 antenna or feed line installation problem. Typical problems causing desktop RF problems include the following:

1. Lack of suitable baluns or chokes. 2. Improper feed line routing near antennas, or improperly designed antennas. 3. Antennas too close to the operating position. 4. Poor equipment cabinet design, such as non-bonded or grounded equipment covers or panels. 5. Poorly designed low-level audio line shield entrances, such as shields allowed to enter cabinets instead of grounding at the enclosure entrance. 6. Improper antenna feed line building entrance, lacking a properly grounded entrance panel. Rather than patching a system problem at the desk, it is much better to correct defects at the source. Coaxial Line Isolators Never install coaxial line isolators between desktop radio equipment. The goal of every operating position is to maintain all equipment cabinets and housings at the same RF potential. Isolators on or near the desk are contrary to this goal, and actually promote or encourage cabinet or chassis RF potential differences. If an RF problem appears at the operating position the correction, repair, or replacement of defective equipment is in order. The only proper line-isolator installation points are either just outside the operating room entrance and/or close to the problems actual source. If the desktop has defective cables or connectors, or poor equipment cabinet design, locate and correct the actual problem. 13 Interconnection Wiring Figure 1 Basic Interconnect Figure 2 Basic Interconnect with Radio Interface Cable Figure 3 Interconnect with Tuner and no KEY LOOP Figure 4 Interconnect using KEY LOOP 14 Front Panel Controls Figure 5 Amplifier Front Panel The front panel contains the following indicators and controls. To prevent damage, become familiar with the front panel before operating the amplifier. 1 PA Module Current meters 2 Forward Power meter and Multimeter (reflected power, module RF balance, ALC, and Module supply voltages) selected by knob 7. 3 Band or REMote selector knob. 4 Backlit Band and REMote LED indicators. 5 ALC limit adjustment. 6 Backlit Function and Fault Warning LED indicators. 7 Multimeter (meter 2) scale function selector knob. 8 Operate/Standby switch, also resets fault warnings. 9 Main Power, also resets power supply overload. Note: The right-hand meters left scale-arc (fig.5 ref 2) continuously indicates forward peak envelope power (PEP) output directly in kilowatts. It is 100 watts, or 0.1 kW, per meter scale picket. PEP has no fixed relationship to long-term average power except, for constant amplitude carriers like a steady CW carrier, when PEP and average powers are equal. PEP is the highest average power during one (or more) radio frequency cycle(s) at the modulation envelope crest. The right-hand meters rightmost scale-arc is used for PEP reflected power in watts and combiner imbalance on the upper scale numbers and pickets. Notice power meter calibrations are not evenly spaced. Lower scale numbers and pickets are evenly spaced, and are for other functions. The lower right scale is used for relative ALC setting and power amplifier modules HV (0-70 volts). 15 Amplifier Rear Panel POWER INPUT ALC RELAY Figure 6 Amplifier Back Panel The power supply should be unplugged before installing or removing this connector. This connector is indexed by a slight vertical offset in the two round index pins. Mate the round pins and holes. Seat the male plug fully onto the amplifier rear panel male connector pins. After seating, the power supply can be plugged into the AC mains outlet. Optional connection. Connects to radio ALC input. Connect to radio amplifier keying line. Radio must pull this line below 2 volts to transmit. KEY LOOP Output for remote tuner use. KEY LOOP Switch Switch to turn on and off the KEY LOOP function. GND RF IN RF OUT Connect to station ground bus, if available. This connection is primarily for extra safety. Connect through good 50-ohm coaxial cable of any reasonable length to radios antenna output connector. This can be a smaller cable, such as RG-58/U. To 50-ohm antenna, antenna tuner, power meter. This is the high power output. 50-ohm coaxial cable and system beyond must safely handle at least 1200 watts. RADIO INTERFACE This connector is for use with Ameritron radio interface cables. It allows automatic band selection (following the radio). It also provides amplifier actuation in transmit mode with some radios. 16 REMOTE These RJ45 connectors are for an Ameritron remote control head, or remote operation with an interface box. It provides access to controls, including most metering functions. Interconnections 1. If you use a desktop grounding bus system, connect the station ground bus to the amplifiers rear panel wing nut. National safety codes require the station ground electrically bond to the power mains safety ground at the building entrance. Do not connect the amplifier to its own isolated ground rod or ground system. 2. Connect the power supply to the amplifier. 3. Connect the RELAY line to the transceivers amplifier control port. This port is usually described or defined in the amplifier interfacing section of the radio or transceiver manual. This port must pull low for transmit, and be open circuit when receiving. Relay control voltage from the ALS-1406 is 13 volts positive with only 15 mA current. You should always check your transceivers manual, but almost any standard transceiver directly interfaces with this amplifier. 4. Connect the RF OUT (output) port to the appropriate point in your station. This is the high power RF output cable. This connection would go to your 1500-watt rated Power/SWR meter, antenna, or antenna matching device. Good quality Mini-8 or RG-8X cables are acceptable for anything but RTTY use, although larger RG-8 style cables are normally preferred. Your antenna matching system, or antenna tuner, must connect to this port. 5. Connect the IN connector to your transceiver. Do not install any active antenna matching devices on this port. In general, the shortest and most direct cable connection is best, although high quality cables can be very long without adverse effect on performance. RG-58/U or Mini-8 (RG-8X) style cables are acceptable. You should never use a tuner of any type on the amplifier input, nor should you drive this amplifier with over 100 watts peak envelope power. 6. The ALC line is optional. In general, transceiver internal ALC is all that is necessary. The ALC monitors the RF output power and reflected power supplied by the ALS-1406 to the load. 7. Operate the bandswitch manually during initial testing. Do not connect band decoders, band data lines, or computer interfaces until initial tests are completed and the amplifier is functioning normally. 8. When using an automatic antenna tuner that has the capability to inhibit the amplifier from operating either during tuning or when conditions are outside of the tuners capability; and when the Radio Interface Cable that has the Amplifier Relay line included (not using the RELAY jack); the KEY LINE can be used. The KEY LOOP Switch is used to route the key signal from the interface to the amp directly or out the KEY LOOP jack. a. If the KEY LOOP is not used, set the KEY LOOP Switch to OFF so the Radio Interface Cable can key the amplifier. b. If the KEY LOOP is used with an automatic antenna tuner switch the KEY LOOP Switch to ON, run a cable from the KEY LOOP connector on the 17 amp to the AMP ENABLE IN connector on the tuner, and run a cable from the AMP ENABLE OUT connector to the RELAY connector on the amp. Optional Radio Interface Cables ALS-1406/ALS-706/ALS-1306/RCS-12 Radio Interface Cables available from Ameritron. Model No. Description DB-13D DB-7DI ICOM with ACC, 13-Pin DIN ICOM with ACC 2, 7-Pin DIN Notes SET Baud RATE 9600 TS-590 menu 53 (HF) 54 (50 MHz) #2, TS-570 menu 39 (HF) and 40 (50 MHz)#2 TS-990 s menu 11 (HF) and menu 12 (50 MHz) set to 3= active high+relay+delay TS-2000 menu 28A #2 Baud rate 9600, menu 28 (HF) channel 2 and 29 (50 MHz) channel 2 DB-DB7DK Kenwood with DB9 (except TS-480) DB-DB8MK Kenwood TS-480 DB-8MY2 DB-8DY DB-10MY DB-DB15Y DB-DB15HE Yaesu FT-

897/857/817/840/890/990/100 Yaesu with standard 8-Pin DIN Band Data Yaesu FT-450/950/1200 Yaesu FT-DX3000 Elecraft Table 2 Optional Radio Interface Cables 18 Operation This amplifier covers all Amateur Radio frequencies below 54 MHz, as restricted by FCC or your local governing authority. Once you have established proper connections, please set the amplifier (Fig. 5, ref 3) to one of the following bands:

Band Frequency Range Notes 160 80 40 30 20 17 15 12 10 6 USA 30 meter power limit currently 200 watts 1.8 - 2.2 MHz 3.0 - 4.8 MHz 4.8 - 9.0 MHz 9.0 - 14.5 MHz 9.0 - 14.5 MHz 14.5 - 22.5 MHz 14.5 - 22.5 MHz 22.0 30.0 MHz Amplifier automatically disables above 26 MHz 22.0 30.0 MHz Amplifier automatically disables below 28 MHz 50.0 54.0 MHz Table 3 Band Frequency Limits Do not operate the amplifier with the band switch on a higher band than the indicated range. Doing so will cause harmonics that will exceed the FCC limits and cause interference with Amateur and other services. Do not operate the ALS-1406 in the 6-

Meter position on any of the other bands. Damage to the filter board can occur. Caution: This amplifier has an FCC mandated automatic disconnect and other features preventing 27 MHz operations. There is no available circuitry or control provision to circumvent this lockout. MARS or CAP Operation For licensed amateur radio operators participating in Military Affiliate Radio Systems or Civil Air Patrol, this amplifier is suitable for use on all frequencies between 1.8 and 54 MHz with some precautions. The upper frequency limits are in bold type in the table above. Do not operate above the bold-type frequency limits in the table above or PA

(power amplifier) or filter damage may occur. Ameritron guarantees to exceed FCC Part 97.317 harmonic suppression standards inside the amateur bands listed in the table above. Ameritron does not guarantee harmonic suppression or operation outside amateur bands. Most commercial services prohibit use of non-commercial radio equipment. This amplifier is inoperable between 26 and 28 MHz. Modifications allowing operation in the 26-28 MHz range is not available, irrespective of licensing or end-use. 19 Initial Operation For your personal and equipment safety, double-check all wiring and connections (fig. 1) before turning power on. After you have verified amplifier connections, follow the procedures below. The following steps are necessary during initial checks:

1. Place the MULTIMETER switch (fig.5 ref 7) in the HV2 position. Place the ALC SET control (fig.5 ref 5) full clockwise (10 on knob scale). The multimeter is the right-side scale on the rightmost panel meter (fig.5 ref 7). 2. With the STANDBY/OPERATE switch (fig.5 ref 8) on STANDBY, turn the power switch (ref 9) ON. 3. There will be a slightly delayed click from the power supply. HV2 (fig.5, ref 2) should immediately rise to near full scale, and after another delay, you should hear another click. The meters and the appropriate BAND LED (fig.5, ref 4) should illuminate. 4. The multimeter HV2 scale (fig.5, ref 2, bottom right scale) should read between 45 and 55 volts. 5. Change the meter switch (fig.5 ref 7) to HV1. The voltage should be the same as in step 4. 6. Rotate the BAND switch (fig.5 ref 3) through all positions. The appropriate BAND LED will illuminate, and you should hear band-filter relays switch between 160-

80, 80-40, 40-30, 20-17, 15-12, and 10-6 selector position changes. 7. Set the BAND switch (fig.5 ref 3) to a band where you have a good 50-ohm high-

power load connected. 8. Change the meter switch (fig.5 ref 7) to REF. In this position, the multimeter indicates reflected power. 9. With no modulation in the FM, AM, RTTY, or CW mode, and the amplifier still on standby, adjust your exciter power to about ten watts. This is to have a steady unmodulated carrier. Verify you have very low power, ideally around 10 watts carrier (not critical), and that VSWR of the antenna system is low. You should see almost no deflection on the reflected power scale (fig.5 ref 2) with the MULTIMETER switch in the REF position. If you see reflected power deflection, check your RF cables and antenna system. Reminder: You cannot use a tuner in your radio, or between your radio and this amplifier, to match the antenna system. Any antenna matching must be between the amplifier and the antenna, and the antenna tuner and other items beyond the amplifier must be conservatively able to handle over 1200 watts of carrier or peak envelope power. 10. Place the amplifier in OPERATE position (fig.5 ref 8). Be sure the BAND on the amplifier matches the band selected on the transceiver. 11. Place the transmitter or transceiver into transmit in FM, AM, RTTY, or CW modes. The green TX LED (fig.5 ref 6) should light. The forward power (fig.5 ref 2) should increase to approximately ten times the initial exciter power reading. Reflected power should remain very low, and the PA current should increase slightly on both scales of the current meter (fig.5 ref 1). No other LEDs should illuminate. 20 12. Briefly, increase exciter power until the amplifier reaches 1200 watts output, or the exciter reaches maximum power without exceeding 1200 watts amplifier power. 13. After you have verified all of this, the amplifier is ready to operate. With 100 watts PEP, this amplifier should show approximately 1200 watts of output power. This can vary slightly from band to band. ALC Adjustment Radio manufacturers do not have standardized interfaces. Because of this, ALC requires some initial adjustment. If the ALC voltage is too low, the ALC will not provide good control of power levels. If the ALC voltage is too high, the ALC will cause a power surge and bounce while power slowly settles at the desired steady threshold. This overshoot, dip, and recovery is caused by slow radio ALC response time, which is aggravated by excessive ALC loop gain. ALC attack bounce shows on a steady carrier (such as RTTY, CW, or FM) as a high initial peak power reading followed by a deep null. The deep null is followed by a slow settling to the desired power level. On SSB, it will show as a slow warble or modulation of power levels, especially at the very start of voice transmissions. If you observe ALC attack bounce, the ALS-1406 will require ALC gain adjustment. The ALS-1406 has a small blade screwdriver adjustment for setting ALC gain. This adjustment on the left cabinet side behind the front panel, near the panel meters. High Duty Cycle Modes When operating the amplifier with high duty cycle modes such as FM, RTTY, FT8, or other digital modes reduce the power input so the output is less than 1200W and the PA current is less than 20A on each module. In addition, if the thermal cutout trips very often or the power supply fuses blow for no apparent reason (no component failures) reduce the power to eliminate nuisance fuse blowing or temperature cutouts. 21 Warning Lights The ALS-1406 has three primary warning lights in the center of the front panel. It also uses other standard LEDs as warnings, flashing them in a certain code that indicates problems. These lights serve the following functions:

ALC: The yellow ALC light indicates ALC output. Flashing is normal when using ALC. A steady intense light indicates a problem. Operational faults reset by placing the amplifier in standby. The following table applies to faults:

Warning Light Steady Warning Light Flash Fault Cause or Cure SWR TX Antenna Reflected Power SWR, PA Band Wrong filter PA TX PA FET too hot PA 10M, PA, TX REM, PA Combiner unbalance Illegal 11 meter operation No or wrong band data when on remote Table 4 Warning Lights High antenna SWR or intermittent antenna or feed line connection Exciter or amplifier on incompatible band, filter failure Excessive power for duty cycle or SWR, lack of proper airflow Excessive 27 MHz signal level Defective or improper remote cable, or bad radio band data information RF Exposure Information FCC RF Exposure - This unit complies with FCC RF Exposure Limits for an uncontrolled environment. To comply with FC RF Exposure Limit requirements, antennas must be operated at a minimum distance of 501.5 cm (197.26 inches). The following chart below Table 5 is a calculation of distances in meters for several different antenna gains. 22 BAND Frequency MHz 160M 2.000 80/75M 4.000 40M 7.000 30M 10.150 20M 14.350 17M 18.168 15M 21.450 12M 24.990 10M 29.700 6M 54.000 Antenna Gain dBi 0 3 6 0 3 6 9 0 3 6 9 0 3 6 9 12 0 3 6 9 12 0 3 6 9 12 0 3 6 9 12 0 3 6 9 12 3 6 9 12 3 6 9 12 15 100W 600W 1200W Controlled Distance in Meters Uncontrolled Distance in Meters Controlled Distance in Meters Uncontrolled Distance in Meters Controlled Distance in Meters Uncontrolled Distance in Meters 0.1 0.2 0.2 0.4 0.5 0.8 1.1 0.7 0.9 1.3 1.9 1.0 1.3 1.9 2.7 3.8 1.3 1.9 2.7 3.8 5.4 1.7 2.4 3.4 4.8 6.8 2.0 2.8 4.0 5.7 8.0 2.3 3.3 4.7 6.6 9.4 3.9 5.6 7.9 11.1 4.0 5.6 8.0 11.2 15.9 0.3 0.4 0.6 0.8 1.2 1.7 2.4 1.5 2.1 2.9 4.1 2.1 3.0 4.3 6.0 8.5 3.0 4.3 6.0 8.5 12.0 3.8 5.4 7.6 10.8 15.2 4.5 6.4 9.0 12.7 18.0 5.3 7.4 10.5 14.8 20.9 8.8 12.5 17.6 24.9 8.9 12.6 17.8 25.1 35.5 0.3 0.4 0.6 0.9 1.3 1.8 2.6 1.6 2.3 3.2 4.5 2.3 3.3 4.7 6.6 9.3 3.3 4.7 6.6 9.3 13.2 4.2 5.9 8.3 11.8 16.7 4.9 7.0 9.9 13.9 19.7 5.8 8.1 11.5 16.2 22.9 9.7 13.6 19.3 27.2 9.8 13.8 19.5 27.5 38.9 0.7 1.0 1.4 2.1 2.9 4.1 5.8 3.6 5.1 7.2 10.2 5.2 7.4 10.4 14.7 20.8 7.4 10.4 14.7 20.8 29.4 9.4 13.2 18.7 26.4 37.3 11.0 15.6 22.0 31.1 44.0 12.9 18.2 25.7 36.3 51.2 21.6 30.5 43.1 60.9 21.8 30.8 43.5 61.5 86.9 0.4 0.6 0.8 1.3 1.8 2.6 3.7 2.3 3.2 4.5 6.4 3.3 4.7 6.6 9.3 13.2 4.7 6.6 9.3 13.2 18.6 5.9 8.4 11.8 16.7 23.6 7.0 9.9 13.9 19.7 27.8 8.1 11.5 16.2 22.9 32.4 13.7 19.3 27.3 38.5 13.8 19.5 27.5 38.9 55.0 1.0 1.4 1.9 2.9 4.1 5.8 8.2 5.1 7.2 10.2 14.4 7.4 10.4 14.8 20.8 29.4 10.5 14.8 20.9 29.5 41.6 13.2 18.7 26.4 37.3 52.7 15.6 22.1 31.2 44.0 62.2 18.2 25.7 36.3 51.3 72.5 30.6 43.2 61.0 86.1 30.9 43.6 61.6 87.0 122.9 Table 5 RF Exposure Distance Chart 23 CFR Title 47 Part 97.13(C) (as of Apr. 1, 2020) requires the amateur operator to be in compliance with the radio frequency exposure requirements. The chart Table 5 above is a calculation of distances in meters for several different antenna gains using the formulae in the bulletin. To calculate the distances in feet multiply the distance in meters by 3.28. The chart Table 6 below is a calculation of some common antenna gains. This will give you a rough estimation of the safe distance needed from the antenna in the direction of maximum gain. The chart is worst-case conditions of a continuous carrier for the full time allowed for exposure. The charts do not take into account the antenna patterns or elevation above the ground. In practice, most antennas have the maximum gain elevated above the ground. For a better estimate, the actual antenna would need to be analyzed for direction of maximum gain and gain in the direction of access. 3 Element Triband Beam 6 Element 6M Yagi G5RV

@30 ft Dipole

@30 ft 43'

Vertical Multiband Vertical Freq Gain dBI Gain dBI Gain dBI Gain dBI Gain dBI Gain dBI 3.800 7.200 10.100 14.150 18.150 21.250 24.950 28.500 50.125 6.1 6.3 7.6 6.6 9.6 9.8 9.9 9.7 10.5 0.6

-0.1 0 1.9 4.3 3.8 4.4 6.1 7.1 8 6.9 5.4 6.2 8 8 7 7 8 3 3 3 3 3 3 3 3 10.1 13.7 10.1 10.1 Table 6 Approximate Antenna Gain for Some Common Antennas Controlled Distance exposure in Table 5 is that of the operator, family, and other members in the residence, given proper training, and allowing exposure for no more than 6 minutes at a time. Uncontrolled Distance is the neighbors and general public with no expectation of any training and the exposure is no more than 30 minutes at a time. The actual exposure level is time and power averaged which will usually reduce the total exposure. For example, the average SSB power is around 20 to 30% of the peak power and will be averaged for the time of the actual transmission. For CW the power will be 100% but the transmitter will be transmitting for only about 40% of the time. RTTY (digital modes), AM, and FM will be 100% duty cycle and last for the length of the transmission. These calculations are for the direction of maximum gain. The FCC Office of Engineering and Technology (OET) Bulletin 65 Supplement B has more information on meeting the requirements. Electronic Code of Federal Regulations (eCFR) https://www.fcc.gov/bureaus/oet/info/documents/bulletins/oet65/oet65.pdf https://www.fcc.gov/bureaus/oet/info/documents/bulletins/oet65/oet65b.pdf https://www.fcc.gov/bureaus/oet/info/documents/bulletins/oet56/oet56e4.pdf ALS-1300SPS Interconnect Diagram AC Mains Selection There are two different power supply modules that may be used in the ALS-1300/ALS-

1306/ALS-1406 power supply with different wiring to switch the power supply between 240 and 120 VAC. Identify which power supply module is used before trying to change the input voltages. Make sure the power supply is unplugged before removing the cover from the power supply. If the power supplies are changed to 120 VAC do not plug into a 240 VAC source. They will fail. 50-ALS600SPS-1B Power Supply Module JUMPER 1 JUMPER 2 120V 240V Jumper 1 A2 to A1 A2 to A3 Jumper 2 A5 to A6 A5 to A4 Figure 7 50-ALS600SPS-1B Line Voltage Jumpers The ALS-1300 / ALS-1306 / ALS-1406 Power supply has two identical 50 volt switching boards. There are a total of four jumpers to change, two for each board. Refer to the figure 20 above for the correct jumper placement for each power supply board. 50-SPS600-1B Power Supply Module 220VAC 110VAC JUMPER Figure 8 50-SPS600-1B Line Voltage Jumpers For 220/240VAC operation (default setting), place the jumper on the 220VAC terminal. For 110/120VAC operation, place the jumper on the 110VAC terminal. Do not change any other jumpers on the board. Do this for both power supply modules in the power supply. Factory 116 Willow Road Starkville, MS 39759 USA 662-323-8211 ALS-1406 LIMITED WARRANTY Ameritron warrants to the original purchaser that this product shall be free from defects in material

(except tubes and RF output transistors) or workmanship for one year from the date of original purchase. During the warranty period, Ameritron or an authorized Ameritron service facility will provide free of charge both parts (except tubes and RF output transistors) and labor necessary to correct defects in material or workmanship. To obtain such warranty service, the original purchaser must:

(1)

(2) Complete and send in the Warranty Registration Card. Notify Ameritron or its nearest authorized service facility, as soon as possible after discovery of a possible defect, of:

(a)

(b)

(c) The model number and serial number, if any:

The identity of the seller and the approximate date of purchase;

A detailed description of the problem, including details on the equipment.

(3) Deliver the product to the Ameritron or the nearest authorized service facility, or ship the same in its original container or equivalent, fully insured and with shipping charges prepaid. Correct maintenance, repair, and use are important to obtain proper performance from this product. Therefore, carefully read the Instruction Manual. This warranty does not apply to any defect that Ameritron determines is due to:

(1) Improper maintenance or repair, including the installation of parts or accessories that do not conform to the quality and specifications of the original parts.

(2) Misuse, abuse, neglect or improper installation.

(3) Accidental or intentional damage. All implied warranties, if any, terminate one (1) year from the date of the original purchase. The foregoing constitutes Ameritron's entire obligation with respect to this product, and the original purchaser and any user or owner shall have no remedy and no claim for incidental or consequential damages. Some states do not allow limitations on how long an implied warranty lasts or do not allow the exclusion or limitation of incidental or consequential damage, so the above limitation and exclusion may not apply to you. This warranty gives specific legal rights and you may also have other rights, which vary from state to state. PLEASE RECORD THIS INFORMATION:

Model _______________ Serial No. __________________ Date of Purchase __________________________________ Purchased From __________________________________ Warranty Card Mailed On ___________________________

FCC Identification Label for ALS-1406 FCC ID Number HO82WUALS1406 FCC ID: HO82WUALS1406 AMERITRON ALS-1406 Serial No: 00001 This Amplifier Certified Under FCC Regulations Part 97 Label is 0.75 by 2.50 First Line is FCC ID Number of the amplifier. Second Line is the Model Number. Third line is a sequential serial number issued during manufacture. Label is placed here on the back of the ALS-1406 Amplifier.

Park Rd., Starkville, 300 Industrial Phone: (662) 323-5869 FAX: (662) 323.-6551 Mississippi 39759 Federal Communications Authorization and Evaluation Division Commission Confidentialit y Request regarding application for certification of FCC ID: HO82WUALS1406 Pursuant treatment to Sections 0.457 and 0.459 of the Commission's of information accompanying this application as outlined below:

Rules, we hereby request confidential Exhibit Type

description and block diagram ALS-1406 Basic Operational Schematic ALS-1406 Board Circuit ALS-1406 Parts List ALS-1406 ALS-1406 Tuning Procedure diagrams Description The above materials The public public. benefits contain disclosure to its competitors. trade secrets and proprietary information of these materials may be harmful not customarily released and provide unjustified to the applicant to the The applicant all accompanying understands that pursuant to Section 0.457 of the Rules, disclosure n will not be made before the date of the Grant for this application. and of this application documentatio Pursuant confidential to DA04-1705 June 15, 2004 of the Commission's public treatment of information accompanying this application we also request temporary notice, as outlined below for 180 Days Type Exhibit ALS-1406 User Manual ALS-1406 Internal Photos p

Martin Jue P President l

:t

300 Industrial Phone:

(662) 323-5869 FAX: (662) 323-6551 Park Rel., Starkville, Mississippi 39759 Date: January 8, 2021 TIMCO ENGINEERING, 849 NW State Road 45 Newberry, FL 32669 INC. SUBJECT: FCC ID: HO82WUALS1406 To Whom It May Concern:

We, the undersigned, hereby authorize our behalf, equipment. Any and all acts carried out by Sharon Hoffman at Timco Engineering Inc. on our behalf shall have the same effect as acts of our own. Sharon Hoffman at Timco Engineering Inc. on to apply to the Federal Communicatio ns Commission and ISED on our This is to advise that we are in full compliance applicant, Anti-Drug Act of 1988, 21 USC853a, denial of federal are not subject to a denial of federal with the Anti-Drug Abuse Act. We, the benefits and no party to the application to Section is subject to a benefits pursuant to that section. pursuant 5301 of the Martin F. Jue President

300 Industrial Mississippi Park Rd., Starkville, Phone: (662) 323-5869 FAX: (662) 323-6551 39759 Date March 16, 2021 Communications and Evaluation Commission Division Federal Authorization 7435 Oakland Mills Road Columbia, MD 21046 Subject:

Extended Frequencies Justification Gentlemen:

We, Ameritron, Grant of Equipment would like to submit the _ Authorization under Part 97 for our FCC ID: HO82WUALS1406 following justification to show the frequency range (1.8 -54 MHz) on the of the FCC Rules if this device operates frequencies. This radio is intended as an alternative the exact frequencies, to listing on unauthorized Per the FCC'S KDB 634817 guidance, violation federal Additionally, services public agencies, for a majority agencies, account it will be used in other countries emergency as well as commercial, services, that accept the FCC Grant of Equipment business, of users as described in the below table. that it's a we acknowledge for use by services. and industrial These Authorization. Frequencies Part 97 Federal ITU MHz 1.8-2.0 97 2.065-2.495 2 .505-3 .500 3.5 -4.0 4.0-4.995 5.005-5.275 5.275-5.45 5.45-7.00 7.00-7.300 7 .300-10.100 10.100 -10.15 10.15-14.00 14.00-14.35 14.35-18.068 18.068-18.16 18.168-21.0 21.-21.45 21.45-24.89 24.89-24.99 24.99-28.0 28.0-29.7 29.7-50 50-54 97 97 97 97 97 97 97 97 97 97 Region 1, 2, 3 1, 2, 3 1, 2, 3 3 1, 2, 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 3 1, 2, 3 1, 2, X X X X X X X X X X X X 7 Sin _el Martin Jue President