Page 104 of HAM Radio 2009 by MFJ Enterprises, Inc.

amateur radio catalog 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 al-811h 12 and 10 meters only the ameritron al-811h · four 811a tubes uses four gives you four fully neutralized rugged fully neutralized low 811a transmitting tubes you get suggested retail cost 811a pa tubes absolute stability and superb per· vertical tube mounting formance on higher bands that can t prevents shorting of tube filament/grid be matched by un-neutralized tubes prolongs tube life ameritron mounts the 811a tubes · fully neutralized vertically not horizontally to prevent improves stability and performance on hot tube elements from sagging and shorthigher bands ing out others using potentially damag· input tune circuit adjustable rear ing horizontal mounting require hard-topanel slug tuned input circuit find 811a tubes to retard harmful sagging · alc control built-in adjustable alc and shorting powerful 20 cfm computer grade fan control · vernier reduction drives tuning and not an open frame phonograph motor -loading reduction drives make tuning draws in cool air to pressurize the cabinet smooth and easy and efficiently cool your 811a tubes for an · dual illuminated meters monitor vital extra long life 800 watts out $899 899 pi-network tuned input provides 50 ohm load for your rig a look inside ameritron s al-811h rtty sstv and am operation al-811hd gives you the al-811h with four 572b tubes installed get a higher power tank circuit and grid overload protection grid overload protection protects the tubes from excessive grid current due to mistuning and it protects against excessive drive power four 572b tubes give you more plate dissipation than a single 3-500z tube al811hd gives you 800 watts output in ssb and 600 watts for continuous duty in cw new get the al-811hd with 572b tubes $1199 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 qsk-5 $359.95 see page 12 for details · attractive lexan front decal · one year ameritron warranty · dimensions 81/4hx133/4wx151/2d inches · operating weight 32 lbs · made in usa heavy duty power supply 17 lb high silicone steel transformer and computer grade capacitors four fully neutralized and rugged 811a transmitting tubes vertically mounted output tank circuit with optimum q for each band mfj enterprises inc 300 industrial park road starkville ms 39759 usa to heavy duty band switch pi-network gives smooth tuning and excellent harmonic suppression product index/order forms on pages 75-76 prsrt std u.s postage paid mfj enterprises inc.

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