Only the Ameritron AL-811H gives you four fully neutralized 811A transmitting tubes. You get absolute stability and superb performance on higher bands that can't be matched by un-neutralized tubes.

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.

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.

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 for 12 and 10 meters.

Four 8``A 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

Operating Weight: 32 pounds.

DIMENSIONS : 15 1/2"D x 13 3/4"W x 8 1/4"H
TUBES : [4] SVETLANA 811A, VERTICAL
POWER SUPPLY : FULLWAVE BRIDGE
OUTPUT POWER : SSB PEP 800W, CW 600W
MAXIMUM DRIVE POWER: 100W
KEYING : +12Vdc @ 100mA
INPUT CIRCUIT TYPE : Pi-NETWORK,SLUG TUNED COILS
FREQUENCY COVERAGE : 160,80,40,30,20,17,15m
FREQUENCY COVERAGE : 10/12m WITH MODIFICATION
EFFICIENCY(SSB) : (ENVELOPE CREST) > 70%
EFFICIENCY(CW) : > 70%
DRIVE REQUIREMENT : 75W FOR FULL OUTPUT