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Ameritron Al-811 linear amplifier gives you plenty power to bust thru
QRM.
You get a quiet desktop linear thats so compact itll slide right
into your station -- youll hardly know its there ... until QRM sets in.
Conveniently plug it into your nearest 120 VAC outlet -- no special wiring
needed. Three tough 811A transmitting tubes, extra heavy duty power supply, all
HF band coverage, pressurized ventilation, tuned input, dual illuminated meters,
adjustable ALC & more.
The first 600 watts make the
difference
The Al-811 gives you 600 watts PEP output -- thats nearly 2
full S-units over your barefoot rig. That could mean the difference between
hearing, "Youre Q-5 armchair copy" and, "Sorry cant copy you, too much QRM." Now
you wont have to stand aside while the "big guns" steal your DX. Youll be able
to log some of those stations first. Going from 600 watts to the full legal
limit gives you less than one S-unit increase. But is that fraction of an S-unit
worth the 3 or 4 times more money itll cost you? AL-811 gives you a powerful
punch at a price thats easy on your wallet.
All band, All mode
coverage
The AL-811 covers all HF bands. Theres no compromise on WARC and
most MARS bands -- you get 100% rated output. You can operate the AL-811 on all
modes. Get 600 watts output PEP SSB and 500 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 theyre 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, sever current overload. The
Ameritron AL-811 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.
The Ameritron advantage: Extra
heavy duty power supply gives you peak performance year after year
The
heart of the AL-811 power supply is its heavy duty power transformer with high
silicon steel core weighing a hefty 17 pounds. A full wave bridge using 52.5 ufd
of total capacitance (four 210 ufd, 470 volt capacitors) produces 1500 volts
under full load and 1700 volts no load. Thats excellent high voltage regulation!
Full height computer grade filter capacitors with screw terminals are used --
not short stubby. light duty soldered-in "high technology" capacitors that cant
dissipate the heat generated by high current.
Rectifier diodes are rated for
a massive surge current of 200 amps. They wont blow even if you accidentally
short the high voltage supply. Wire wound, 7 watt, 50 K ohm equalizing resistors
safely protect each filter capacitor -- not 2 watt, 100 K ohm carbon composition
resistors that can open and cause your filter capacitors to explode or fail. The
Ameritron AL-811 power supply is built tough so you get peak performance year
after year.
Tuned input provides excellent load for any rig
A
Pi-Network tuned input provides a 50 ohm load for your rig. Even fussy solid
state rigs can deliver their full drive to AL-811. Low loss slug tuned coils --
tunable from the rear panel -- let you optimize performance. High quality low
drift silver mica capacitors maintain proper tuning.
Output tank:
optimum Q on each band
the low loss pi-network output tank of the AL-811
has been carefully designated for optimum Q on each band and built with quality
RF components. The result is peak performance over each band, wide impedance
matching range and exceptionally smooth tuning with efficiencies close to 70%.
Even a 3:1 SWR load wont damage the tubes or tank components. A ball bearing
vernier reduction drive makes plate tuning precise and easy.
Quiet
pressurized ventilation keeps your tubes safely cooled
A quiet blower
pressurizes the cabinet with a large volume of air flow. It keeps the 811A tube
temperature well below the tube manufacturers rating -- even with a key down
carrier at 400 watts output -- without the overwhelming noise of oversized
fans.
Two illuminated meters
Two illuminated meters give you a
clear picture of your AL-811 operating conditions so you can tell right away if
something is wrong. the Grid Current meter continuously check for improper
loading. The other meter switches between high voltage and plate current to warn
of abnormal conditions.
Ameritron exclusive Adapt-A-Volt power
transformer
Too high line voltage stresses components and causes them to
wear out and fail. Too low line voltage causes a "soft-tube" effect -- low
output and signal distortion. Ameritrons exclusive Adapt-A-Volt power
transformer has a special buck-boost winding that lets you compensate for
stressful high line voltage and performance robbing low line voltage. This makes
your components last longer and gives you peak performance -- regardless of your
line voltage.
QSK Compatible
For lightning fast QSK operation,
use the optional external QSK-5, electronic PIN diode switch.
Plus
More...
An Operate/Standby switch lets you run barefoot, but you can
instantly switch to full power if needed.
A transmit LED tells you when
your rig is keying your AL-811.
A 12 VDC keying relay makes it compatible
with solid state and tube rigs. Built-in back-pulse canceling diode protects
your rigs keying circuit.
Shielded RF compartment. One year limited
warranty. UPS shippable. Shipped with transformer installed and wired for 120
VAC. Draws 8 amps at 120 VAC.
Made in USA
Made in the USA. At
Ameritron, we dont just ship amplifiers we build them to last!
