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.
7.) The ALS-1306 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. 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.
(even for an instant), if thermal limits are reached, or if there is a catastrophic failure. The alert codes are in a table above on page 10. 10.) The ALS-1306 metering reads peak envelope power on all RF power functions. Revision 2...
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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.
MARS or CAP Operation ...........................18 ..............................18 ARNING IGHTS Initial Operation ..............................19 ALC A ..............................20 DJUSTMENT ALS-1306 FUNCTIONAL OVERVIEW......................... 21 General Operation .............................21 Power Division..............................21 PA Amplifiers ..............................21 2KWF6 Lowpass Filter Assembly ........................22 Control and Protection Logic ..........................22 SWR..................................22 CIRCUIT BOARDS ..............................23 2KWF6 ................................23...
• Weight amplifier section 23 pounds Introduction The Ameritron ALS-1306 is 1200-watt nominal output, 160 through 6-meter amateur radio band, solid-state amplifier. The ALS-1306 uses eight 50-volt, conservatively rated, linear RF MOSFETs. These MOSFETs are specifically designed for linear power amplifier applications, not class C or pulse service.
(30-ampere peak) fully current-limited supplies. Each PA (power amplifier) module in the ALS-1306 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.
Amplifier Overview The Ameritron ALS-1306 is a solid-state, 1200-watt nominal RF output power, 1.8-54 MHz amplifier. The ALS-1306 meets or exceeds all FCC requirements governing amateur radio external power amplifiers. The ALS-1306 uses four pairs of exceptionally low distortion, push-pull MRF-150 (or equivalent) SSB RF power transistors.
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 13-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.
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. 2. Insert the fuse and cap assemblies into the power supply’s fuse holders. The fuses lock in place with a slight turn.
The only proper line-isolator installation points are either just outside the operating room entrance and/or close to the problem’s actual source. If the desktop has defective cables or connectors, or poor equipment cabinet design, locate and correct the actual problem. Safety and Lighting Grounding The power supply cabinet grounds through a safety ground pin on the power plug.
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Basic Interconnect with Radio Interface Cable Interconnect with Tuner and no KEY LOOP Interconnect using KEY LOOP Interconnections Figure 1 Revision 2...
This port must pull low for transmit, and be open circuit when receiving. Relay control voltage from the ALS-1306 is 12 volts positive with only 15 mA current. You should always check your transceiver’s manual, but almost any standard transceiver directly interfaces with this amplifier.
Never use a non-FCC accepted device with this amplifier. 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-1306 to the load.
Front Panel Amplifier Front Figure 2 The front panel contains the following indicators and controls. To prevent damage, become familiar with the front panel before operating the amplifier. 1 FET module current meters 2 Forward Power meter and Multimeter (reflected power, module RF balance, ALC, and Module supply voltages) selected by knob 7.
25-28 MHz range is not available, irrespective of licensing or end-use. Warning Lights The ALS-1306 has three primary warning lights in the center of the front panel. It also uses other standard LED’s 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.
Warning Warning light Fault Cause or Cure light Flash Steady Antenna Reflected High antenna SWR or Power intermittent antenna or feed line connection Wrong filter Exciter or amplifier on SWR, PA Band incompatible band, filter failure PA FET too hot Excessive power for duty cycle or SWR, lack of proper airflow Combiner unbalance...
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-1306 will require ALC gain adjustment. The ALS- 1306 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.
ALS-1306 Functional Overview The ALS-1306 is an amateur radio multiband radio frequency linear power amplifier. This device complies with technical standards of CFR Title 47 part 97.317(a) and (b). General Operation This linear amplifier covers the 160, 80, 40, 30, 20, 17, 15, 12, 10, and 6-meter amateur bands.
CB2 also contains bias, relay sequencing, and fan speed controls. The CB2 board contains band-decoding systems, and automatically disables operation between 25 and 28 MHz in all ALS-1306 amplifiers regardless of band selection mode. This embedded logic function cannot be disabled or changed.
Circuit Boards There are ten basic circuit boards plus two power amplifier modules in the ALS-1306. The text below gives a brief description of each board’s function. 2KWF6 The 2KWF6 is a high-power low-pass filter. It is the very large topmost board with several large toroids and air wound inductors.
The SWR board is on the rear panel in front of the RF output connector. It is a traditional 50- ohm directional coupler. The null adjustment is accessible through a rear panel hole. Revision 2...
PA Module Not used PA Module Rev1.2 1306 OY Omite 0.001uF 0.33uF Not used 0.33uF 0.1uF Not used 0.1uF OY Omite Not used 0.001uF Not used Not used 0.1uF Not used PA Out R27 22 50ohm 0.1uF R25 22 T T2 R23 22 300pF 300pF...
IMITED ARRANTY Ameritron warrants to the original purchaser that this product shall be free from defects in material 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 and labor necessary to correct defects in material or workmanship.
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