Ameritron ALS-1300 1200-watt NO TUNE TMOS-FET AMPLIFIER The Ameritron ALS-1300 is a 160 through 15-meter 1200-watt output solid-state amplifier. An optional userinstalled MOD-10MK filter assembly extends operation to 12- and 10-meters. The ALS-1300 uses eight 50volt conservatively rated linear RF MOSFETS. These 50-volt linear FET’s produce an exceptionally clean signal compared to other solid-state amplifiers. Fan speed is regulated by temperature sensors assuring conservative cooling with minimum noise.
Table of Contents TABLE OF CONTENTS .......................................................................................................................2 AMPLIFIER FEATURES ......................................................................................................................3 POWER SUPPLY .................................................................................................................................4 Power Line Requirements ................................................
Amplifier Features This amplifier provides the following standard features: • Eight conservatively rated, very linear 50-volt MOSFET transistors • Operational in a few seconds.
Power Supply The power supply for the ALS-1300 is a voltage regulated current limited 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-1300 operates from the separate 50-volt sources, giving a total dc input power rating of 2500 watts to the power amplifier modules.
General Information Amplifier The Ameritron ALS-1300 is a solid-state 1200-watt nominal RF output power 1.8-22 MHz amplifier (1.8-30 MHz with optional MOD-10MK). This power is peak envelope power, which is the same as actual carrier power on CW. The ALS-1300 uses eight exceptionally low-distortion push-pull parallel MRF-150 or equivalent RF power TMOS transistors. The ALS-1300 meets or exceeds all FCC rules governing amateur radio external power amplifiers.
Warning: Do not block cooling air inlets and outlets! Never expose the amplifier to water or mist. Airflow The amplifier must have a clear area to the 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 and both lower sides. Two inches of clearance is normally adequate for full ventilation. Keep any papers or loose objects that might impede airflow away from the air inlets and outlets.
Interconnection Wiring POWER SUPPLY FUSE ANTENNA, ANTENNA TUNERS, SWITCHES, FILTERS FUSE ALS - 1300 OUT IN REMOTE A B RLY ALC TRANSMITTER / TRANSCEIVER ALC RLY ANT INTERCONNECTIONS Interconnections Figure 1 7
Amplifier Rear Panel PWR SUPPLY To prevent connecting the power plug wrong, the large black multi-pin connector is indexed by an offset in the two round pins. One round index hole is closer to the outer connector edge. Mate the round pins and holes and seat the male plug fully onto the amplifier rear panel pins. ALC Optional connection. Connects to radio ALC input. Mandatory if using a radio over 100 watts. RLY Connect to radio amplifier keying line. Radio must pull this line below 2 volts to transmit.
Front Panel Amplifier Front Figure 2 9
Front Panel Operation Two dual-movement cross-needle meters are illuminated with LEDs J4 determines the brightness of the LEDs. J4 is located on the MB1 board Fig 8 page 19 Left hand meter (Fig2.1 page 9) is a dual current meter. It monitors current on PA “A” and PA “B” Right hand meter (Fig 2.2 page 9) continually monitors forward RF peak output on one scale, while the second scale monitors reflective peak power, combiner mismatch, ALC, and each power amplifier operating voltage.
ALC Monitors the ALC voltage on the rear panel ALC Jack. Meter reading is the 0-70 scale which corresponds to 0 to -7 volts. HV1 Monitors the operating voltage on the Power Amplifier Module “A”. Meter reads on the 0 to 70 scale. Should read 48-50 volts HV2 Monitors the operating voltage on the Power Amplifier Module ‘B”. Meter reads on the 0 to 70 scale. Should read 48-50 volts OPERATE/ STANDBY SWITCH (Fig 2.8 page 9). In Standby, disables the relay line from the transceiver. The amplifier is bypassed.
When operated outside the frequency limits above, harmonic suppression might not meet acceptable limits. You may have to use additional external 2nd harmonic filtering. Ameritron guarantees to exceed FCC part 97.307 harmonic suppression standards only inside the frequency ranges listed above. Contact Ameritron with your specific requirements. Ameritron requires proof of a valid MARS or CAP license as well as your own amateur radio license for technical assistance.
the antenna, and the antenna tuner must be able to handle at least 1200 watts of carrier or peak envelope power. 9. Place the amplifier in OPERATE (fig.2 ref 8). Be sure the BAND selected on the amplifier matches the band selected on the transceiver. 10. Place the transmitter or transceiver into transmit in FM, AM, RTTY, or CW modes. The green TX LED (fig.2 ref 6) should light. The forward power (fig.
Circuit Boards There are ten basic circuit boards plus two power amplifier modules in the ALS-1300. The text below gives a brief description of each board’s function. 2KWF The 2KWF is a high power low pass filter. It is the very large board with large toroids and a few air wound inductors. This board contains filter SWR fault detection, power amplifier unbalance detection, and multiple high power low pass 5-pole filters.
RJ45 The RJ45 board mounts on the rear panel. It contains two RJ-45 jacks used for remote control operation. RLY The RLY board contains two transmit and receive relays - one for RF output switching and the other for RF input switching. T/R relays activate with a low on terminals K (key) J1-3 and RJ1-7. The CB1 board contains the relay timing controls. SWR The SWR board is on the rear panel in front of the RF output connector. It is a traditional 50-ohm directional coupler.
Bandswitch BS1 BS - 1 LED1 160 LED2 80 D1 1N4001 D2 1N4001 80 2 40 D3 1N4001 J1 G 160 80 40 20 15 10 12V D4 1N4001 J2 D5 1N4001 +12V Remote J3 G 160 80 40 20 15 10 12V D6 1N4001 R1 1k 30 LED3 40 1 3 160 +12V LED4 30 4 20 LED5 20 5 17 9 6 SW 1 rear view 7 15 10 12 LED6 17 8 LED7 15 LED8 12 LED9 10 +12V 7 July 2008 BS1 bandswitch figure 4 16
Control Board CB1 CB1 rev2.1 090227 R1 1k ZD1 J1 G + K F R REAR PANEL A TO MB J1 10k R58 U4pin8 U4pin4 DC12V 1A .01 5 6 3 U1B U1A G + F R T P S A CL R11 100 R5 100 12 R17 1k C3 .1 10 11 14 D7 D2 1 R29 27k R16 4.7k D4 D6 D5 16 LM358 U4A 3 D9 R28 100 D3 U1D 13 DC12V C2 .1/50v 7 13 1 CLK5 C1 .1/50v F2 1A DC12V R57 1k 4042 U3 7 2 R2 100 DC12V 8 VR10 25k 40% R8 1k S R4 100 J5 R10 100 R3 100 C4 F1 U1pin4 U1pin11 R59 10k 5.1v 1 Q1 3906 C15 .47 R27 4.
Combiner 2000 watt CMB CMB 081217 rev0a T5 T6 50 OHMS IN PA A 100 50 OHMS IN 50 OHMS OUT PA B CMB combiner board Figure 6 Filter FL10 FL10 081210 L1 1 C1 130pF In C2 130pF L2 1 C3 130pF Out C4 130pF FL10 filter 10 meter Figure 7 18
Metering Board MB1 -12V FWD SPEED REF SPEED R15 1m 40% R5 10k LM324 R20 4.7k 8V U1A 3 2 1 C8 R6 1m .01 R9 10k 5 PIN 1...GND 2...12 3...12 + 4...FWD PWR 5...RFLCTD PWR 6...TRANSMIT LED 7...COMBINER LED 8...SWR LED 9...ALC VOLTAGE OUT 10...COMBINER LVL CAL U1B 7 6 11 R18 4.7k CTRL J1 D2 1N916 D3 1N916 D1 1N916 4 R16 1m 40% 8V R2 2.5k 40% C3 + 2.2 R3 5.6k C2 .1 D6 1N916 D9 1N916 D5 1N916 R36 1k R34 220K -12V D8 1N916 R37 1k 8V R17 4.
PA Module PAM-600 081217 Revision 0a Yel C4 .1uF C1 Org 00 R2 NTC C6 .33uF C7 .33uF R8 18 18R10 R7 1k R9 1k R13 P1 T1 C10 470pF CONN C11 330pF 18 R19 Red t u O A P Q2 1 R11 C8 .1uF n I A P C3 470pF Q1 R6 18 C5 .1uF R1 NTC C2 .001uF 1 R4 18 R3 .1uF R5 470 22 R14 22 R15 22 R16 22 R17 22 R18 22 R12 C9 470 .001uF T3 X1 T2 R21 C13 470 .001uF T4 C23 .33uF C24 .33uF FB2 Q3 1 R20 V1 Red C12 .1uF C14 .1uF R22 18 C16 .33uF R23 1k FB1 C21 .33uF C17 .
Interface Connections RJ45 RJ45 Rev0 090217 Pin8 J1 Pin6 Pin7 - - Pin4 Pin3 Pin5 Pin8 Pin2 Pin6 Pin7 Pin1 J2 Pin4 Pin5 Pin2 Pin3 Pin1 R2 560 1/2W D1 D2 R1 1k C1 0.
WHITE GREEN 22
White 50V 23
Reference figures and drawings Interconnections Figure 1 ....................................................................................................................................... 7 Amplifier Front Figure 2......................................................................................................................................... 9 2KWF output filter Figure 3 .............................................................................................................................
Exhibit V Operational description HO82WUALS13 ALS-1300 Technical and Operational Overview The ALS-1300 is an amateur radio multiband radio frequency linear power amplifier. This device requires certification. 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 and 15-meter amateur bands. Up to 100 watts exciter power is applied to relay RLY1 on circuit board RLY.
transistor temperature increases. This bias feedback system keeps transistor quiescent current stable independent of transistor junction temperatures. These thermistors also feed a comparator that removes drive when transistor temperature becomes unsafe. The second set of thermistors, R1, monitor heatsink temperatures. Voltage from thermistor R1 regulates fan speed, increasing airflow as the heat sink warms.
AMERITRON 116 Willow Road Starkville, MS 39759 USA 662-323-8211 LIMITED WARRANTY 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.
