Specifications

Only the AMER-
ITRON AL-811H
gives you four fully
neutralized 811A trans-
mitting 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 short-
ing out. Others, using potentially damag-
ing 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 trans-
former, 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 811A Tubes: Uses four rugged,
fully neutralized low cost 811A PA tubes.
• Vertical Tube Mounting: Prevents short-
ing 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 opera-
tion. 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 elec-
tronic pin diode Transmit/Receive switch.
QSK-5, $359.95. See page 96 for details.
• Attractive Lexan front decal
• One Year AMERITRON warranty.
• Dimensions: 8
1
/
4
Hx13
3
/
4
Wx15
1
/
2
D inches.
• Operating Weight: 32 lbs. • Made in USA
A look inside AMERITRON’s AL-811H
Pi-Network Tuned input
provides 50 Ohm
load for your rig.
Heavy duty power supply:
17 lb. high silicone
steel transformer and
computer grade capacitors.
Pi-network gives smooth
tuning and excellent
harmonic suppression.
Heavy duty band switch
Four fully neutralized and
rugged 811A transmitting
tubes vertically
mounted.
800 WATTS OUT . . .
$
949!
AL-811H
$
949
Suggested Retail
New! Get the AL-811HD
with 572B tubes . . . $1249
AL-811HD gives you the AL-811H with
four 572B tubes installed. Get a higher
power tank circuit and grid overload protec-
tion. Grid Overload Protection protects the
tubes from excessive grid current due to mis-
tuning 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, SSTV and AM operation.
www.ameritron.com 89
AL-811H
Output tank circuit with
optimum “Q”
for each band
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