Get the AL-811HD with 572B tubes AL-811HD gives you the AL-811H with four 572B tubes installed. Get a higher power tank circuit and grid overload protection. Grid Overload Protection protects the tubes from excessive grid current due to mistuning and it protects against excessive drive power. Four 572B tubes give you more plate dissipation than a single 3-500Z tube. AL-811HD gives you 800 Watts output in SSB and 600 Watts for continuous duty in CW, RTTY, SSTVand AM operation. You also get efficient full-size heavy duty tank coils, computer grade capacitors, heavy duty high silicon core power transformer, slug tuned input coils, operate/standby switch, transmit LED, ALC, dual meters, QSK compatibility with QSK-5 option and much more! SPECIFICATIONS: Output power: 800 Watts PEP, 600 Watts CW. All Band Operation: Covers 160-15 Meters including WARC bands. Can be user modified for12 and 10 Meters. Four 811A Tubes: Uses four rugged, fully neutralized low cost 811A PA tubes. Vertical Tube Mounting: Prevents shorting of tube filament/grid, prolongs tube life. Fully Neutralized: Improves stability and performance on higher bands. Input Tune Circuit: Adjustable rear panel slug tuned input circuit. ALC Control: Built-in adjustable ALC control. Vernier Reduction Drives: Tuning and loading reduction drives make tuning smooth and easy. Dual Illuminated Meters: Monitor vital operating functions. Heavy Duty Power Supply: 17 pounds, high silicone steel core transformer and computer grade filter capacitor gives 1700 Volts high voltage at no load and 1500 Volts at full load. Multi-Voltage Operation: User selectable for 100/110/120/210/220/230 VAC operation. Shipped with transformer installed and wired for 120 VAC for domestic model or 240 VAC for export model. Air-Cooled: Quiet pressurized ventilation keeps tubes safely cooled. QSK Compatible: Optional external electronic pin diode Transmit/Receive switch. QSK-5 Attractive Lexan front decal One Year AMERITRON warranty. Dimensions: 8 ¼" x 13 ¾" x 15 ½". Operating Weight: 32 lbs. Made in USA Ameritron AL-811 Variants 600 W output(3 x 811A tubes) 800 W output(4 x 811A tubes) 800W output(4 x 572B tubes) US 120V AL-811 AL-811H AL-811HD Export 220/240V AL-811X AL-811HX AL-811HDX Export 220/240V CE certified AL-811XCE AL-811HXCE AL-811HDXCE Export 120V w/10 Meters AL-811Y AL-811HY AL-811HDY Product Manuals Download Product Manual
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