The AL-811H gives you 800 watts PEP output for that extra punch needed to be heard when the 100 watt transceiver isn't enough. 

Only the Ameritron AL-811H gives you four fully neutralized 811A transmitting tubes. You get absolute stability and superb performance on higher bands that cant be matched by un-neutralized tubes.

All US bands, All mode coverage

The AL-811H covers all HF bands - 160 thru 15 meters. You can get 10 and 12 meter operation instructions with proof of US Amateur Radio license. There's no compromise on WARC and most MARS bands -- you get 100% rated output. You can operate the AL-811H on all modes. Get 800 watts output PEP SSB and 600 watts output CW. You even get 400+ watts on demanding continuous modes like RTTY, SSTV, FM and AM.

How the low cost 811A tube resists premature failure -- even when your amplifier is mistuned
 
First - they're constructed with widely spaced elements that minimize the chance of touching and causing a short -- even if the plate gets hot enough to melt. Second - they use a directly heated thoriated tungsten filament cathode that prevents the electron emitting layer from instantly stripping off -- even if mistuning causes a sudden, severe current overload. The Ameritron AL-811H is excellent for the newcomer because its tough enough to withstand momentary mistuning. And the tubes are so inexpensive that you can replace one for mere pocket change.

Ameritron mounts the 811A tubes vertically -- not horizontally -- to prevent hot tube elements from sagging and shorting out. Others, using potentially damaging horizontal mounting, require hard-to-find 811A tubes to retard harmful sagging and shorting.

Exceptional Cooling

Powerful 20 CFM computer grade fan -- not an open frame phonograph motor -- draws in cool air to pressurize the cabinet and efficiently cool your 811A tubes for an extra long life.

Rugged Construction

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.

Ameritron AL-811H Amplifier Instructions (345K pdf)

Specifications:

• Output Power: 800 Watts PEP, 600 Watts CW.
• All Band Operation: Covers 160 - 15 Meters including WARC bands. Can be user modified for 12 and 10 meters.
• Four 811A Tubes: Uses four rugged, full 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.
• Attractive Lexan front decal
• One Year Ameritron warranty.
• Operating Weight: 32 pounds

Made in the U.S.A.

Ameritron products are warranted by the manufacturer to be free from defects in materials and workmanship for a period of one year from the date of purchase.

Warranty of the amplifier vacuum tubes also involves the manufacturer's date code.

Contact Ameritron for further details of their warranty policy and procedures.

Ameritron
116 Willow Road
Starkville, MS 39759

General Information: (662) 323-8211
Technical Support: (662) 323-8211
Fax Number: (662) 323-6551 All products manufactured by Ameritron have a one year limited warranty. Ameritron's AL-80B amplifier carries a two year limited warranty. All transmitter tubes are warranted by the tube manufacturers.

Contact Ameritron for further details:

Ameritron
116 Willow Rd.
Starkville, MS 39759
Tel: (662) 323-8211
Fax: (662) 323-6551

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