Page 100 of HAM Radio 2009 by MFJ Enterprises, Inc.

ameritron super legal limit amplifiers these three rugged linears all use a super heavy duty hypersilr power supply capable of 2500 watts ameritron s al-1500 amplifier with eimacr 3cx1500a7 all this power plus 65 efficiency pi-network tuned input pi/pi-l output inrush current protection multi-voltage transformer qsk compatability and a one-year warranty the guts of the al-1500 is its heavy duty power supply with a 32 lb hypersilr transformer using a high silicone steel core computer grade capacitors 33 mfd total heavy duty bleeders and twenty 3 amp 1000 volt power rectifiers give you a stiff 3300 volts fully loaded the al-1500 is built on a rugged steel al-1500 feel the need for maxichassis with a separate rf compartment mum legal hf output fully shielded to keep rf from leaking out eimacr tube power ameritron s al-1500 will give it to you keeping rfi and tvi to a minimum suggested retail using the herculean al-1500 3cx1500a 8877 ceramic tube with its high power import tube gain the al-1500 needs only 65 watts of drive from your exciter to deliver the goods transceivers and other exciters just loaf at 1500 watts out cool efficient operation is provided by a forced-air system with tube chimney using a commercial grade die-cast ball bearing blower for maximum tube life the tube is further protected by time delay starting and automatic over-current shutoff to remove drive power if the amplifier is mis-tuned you get full legal power output from a an inside look at the ameritron al-1500 whisper quiet desktop linear measures superb rf design and layout hi-q tank 181/2d x17wx10h inches and covers all circuit and commercially rated rf power bands 160-15 meters including warc and components give you 65 plate efficiency mars 80 of full output set to nearest over the entire operating range power goes amateur band 10/12 meters into the antenna instead of into heat modifiable 50-ohm broadband pi-network tuned inyou get 1500 watts output with slug-tuned coils is used even fussy put 1/2 hour continuous solid state transmitters deliver full power carrier and 2500 watts a carefully designed pi/pi-l output net30 second continuous work using the optimum q for each band carrier and 2500 with vernier ball drives gives smooth tuning watts plus 30 wide matching range full band coverage minute pep twoand peak performance at all power levels tone test you get the al-1500 s grid overload circuit protects the tube from excessive grid current if 175 ma of peak gric current is reached the opr led will no longer light and the amplifier will go into a bypass condition until reset by the operator transformer provides many options since excessive line voltage stresses components low line voltage causes a soft tube effect for example ameritron s exclusive multi-voltage power transformertm lets you optimize for different line voltages select from 4 different primary voltage ranges from 205-219 vac to 252 to 265 vac the amplifier comes wired from the factory for 240 vac the al-1500 has two illuminated panel meters grid current meter provides continuous reading of the critical grid current and indicates proper safe amplifier operation the other meter can be selected to read plate voltage plate current peak rf watts or alc a ssb/cw selector switch chooses bias voltage for best linearity on ssb or lowest dissipation on cw the operate/standby switch in standby maintains the tube s filament and plate voltages while allowing barefoot operation includes 12 volt dc auxiliary jack and an xmt led to provide indication of proper amplifier keying by the exciter power required 240 vac 15 amps frequency coverage 1.8,3.5,7,14 21 mhz warc bands usermodifiable for 28 mhz fcc license required size:181/2dx17wx10h 77 pounds ups shippable 3 boxes hypersilr transformer weighs 32 lbs slug core tuning tool 965-6204 $3.00 plastic tuning stick for adjusting slug cores .1 inch hex end 71/4 long fits ameritron tube amplifier input coils 3495 3095 ham radio s toughest this classic linear gives tube the eimacr you full legal output using a 3cx1200a7 is in ham pair of 3-500z graphite tubes radio s toughest amplifier it examine the features and comhas a 50-watt control grid ponent ratings of the al-82 and dissipation it also has the compare it to any competing same super heavy duty power amplifier using two 3-500zs supmost ply comal-82 al-1200 that s peting amplifiers using 3 in our al-1500 amplifier 500zs can t give you 1500 suggested retail watts because their lightsuggested retail that loafs at full power a 3cx1200a7 has the lowweight power supplies can t est quantity history of field replacement use these tubes to their full potential our of any modern transmitting tube that we al-82 amplifier uses the same hypersilr use it has the ruggedness and power hanpower transformer and used in the aldling of ceramic tubes combined with the 1500 and al-1200 amplifiers powerful long-life of thoriated tungsten filaments stuff just loafs at full power ameritron s 3cx1200a7 amplifier ameritron s dual 3-500z amplifier 3459 2745 www.ameritron.com · toll-free 1-800-713-3550 5

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