Page 79 of MFJ 2006 Catalog by MFJ Enterprises, Inc.

AMERITRON...the worlds high power leader! 79 AL-811 . . . 600 WATTS . . . $649! More hams use Ameritron AL-811 amplifiers than any other amplifier in the world . . . The AL-811 has earned a worldwide reputation for legendary quality, flawless performance, proven reliability and superb customer service . . . Ameritrons AL-811 linear amplifier gives you plenty of power to bust through QRM! You get a quiet desktop linear thats so compact itll slide right into your operating position youll hardly know its there . . . until QRM sets in. And you can conveniently plug it into your nearest 120 VAC outlet no special wiring needed. You get three tough 811A transmitting tubes, extra heavy duty power supply, all HF band coverage, pressurized ventilation, tuned input, dual illuminated meters, adjustable ALC and much more for an incredible $649! The First 600 Watts makes 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 log some of those stations first. All band, all mode Coverage AL-811 covers all HF bands. No compromise on WARC and most MARS bands -- you get a 100% rated output. Operate AL-811 on all modes. Get 600 Watts output PEP SSB and 500 Watts output CW. You even get 300 Watts on continuous carrier modes like RTTY, SSTV, and FM. The low cost 811A tubes resists failure because . . . First, theyre constructed with widely spaced elements that minimize the chance of elements 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-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. 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 a high silicon steel core weighing a hefty 17 pounds. A full wave bridge using 67.5 mfd of total capacitance (four 270 ufd, 450 volt capacitors) produces 1500 Volts under full load and 1700 Volts no load. Thats excellent high voltage regulation! Rectifier diodes are rated for a massive surge current of 200 amps-- 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 filter capacitors to explode or fail. Ameritrons 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 the 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 has been carefully designed for optimum Q on each band and built with top 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 tubes/tank components. A ball bearing vernier reduction drive makes plate tuning safe, precise and easy. 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 checks for improper loading. The other meter switches be-tween high voltage and plate current to warn of abnormal conditions. Exclusive Adapt-A-Volt TM power transformer Too high of 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 TM power transformer has a special buck-boost winding that lets you compensate for stressful high line voltage and performance robbing low line voltage. Your components last longer and gives you peak performance regardless of your line voltage. Plus much, much more . . . An Operate/Standby switch lets you run barefoot, but you can in-stantly 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 all solid state and tube rigs. Back-pulse cancelling diode protects the rig keying circuit. Shielded RF compartment. One year limited warranty. Compact 16Dx13 3/4Wx8 H . 30 lbs. UPS shippable, has transformer installed and wired for 120 VAC. Draws 8 amps at 120 VAC. Export model is AL- 811X wired for 240 VAC. AMERITRON 116 Willow Road, Starkville, MS 39759 Tech: 662-323-8211 Fax: 662-323-6551 www.ameritron.com AL-811 $649 Suggested Retail Ameritron gives you four 811A tubes, and 800 Watts for the same price as their 3 tube 600W unit . . . Why settle for less power and pay more? Only Ameritrons 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. Ameritron mounts the 811A tubes vertically not horizontally -to prevent hot tube elements from sagging and shorting out. Potentially damaging horizontal tube mounting requires special 811A tubes to retard sagging and shorting. Quiet, powerful computer grade blower draws in plenty of cool air. it pressurizes the cabinet and efficiently cools your 811A tubes. Our air flow is so quiet, youll hardly know its there unlike noisy, oversized blowers. Efficient, full size heavy duty tank coils, computer grade capacitors, heavy duty silicon power transformer, slug tuned input coils, operate/standby switch, transmit LED, ALC, dual meters, QSK compatibility with Ameritrons QSK-5 plus more! 800 Watts . . . $799!

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