Page 1: ...ers theamateur radiobands160through 15 meters lt alsofeatures widefrequency coverage for MARSandother srrvicesauthorized to operate at highpower TheAL BOA usesanEimac3 5002 high mu triodein a classAB ground ed gridcircurt A built in ALCcircuit prevents the amplifier outputfromflat topping if theexciter gainis inadvertantly settoo hrgh The AL BOA is factory wiredfor 117V 50 60Hz primarylinevoltage ...
Page 2: ...ol about 200 ohiqher than normal 3 Speakinto the microphone in a normaltoneol voiceand observethe readingon the 0 2000R F Wattsscale 4 Adjustthe ALC ADJ controlon the rearpaneluntilthe amplifier is not clippingon an RF scope 5 lf an RF scopeis notavailable adlusttheALCcontrol so theaudiopeaksdo notexceedthesingletoneoutputof 1000watts METERING FUNCTIONS TheAL BOA hastwoilluminated panelmeters TheG...
Page 3: ...G 8type coax Connectthe RELAY phono jackon therearof theAL BOA to thenormal lyopenterminals of theRELAYjackon thetransmitter The RELAY jackontheAL 80A haspositive 12VDCopencircuit andprovides 100MAof current whenpulled toground Con nectas shorta groundleadas possible froma goodearlh ground to theGNDterminal The 12Vconnection on the rearpanelprovides 12VDC at 100 MA maximum to operate externaldial ...
Page 4: ...C linecordintothepropervoltage outlet TheAL 80Ais factory wiredfor 117VAC 50 60Hzoperation Setthe PWR OFF switchto PWR The meterlampsshouldlightand the blowershouldstart Readthe0 3500V scaleon themultimeter lt shouldindicate 3100voltsnominal 4 Withlhe amplifier stillon standby tunetheexciterintothe normal5Oohm loadaccording to th manufacturer s instructions Turnthe exctterdrivelullydownaftertuning...
Page 5: ...tsnor v with iO0 wattsof exciterpower 12 Applyenoughdriveto indicate eithert000 wattsof outputpoweror 200mA of gridcurrent Re peak the LOAD and PLATEcontrols Thegridcurrentmustnotbe over200mA the platecurrentover55OmA or the ouipurover 1200 watts 13 In CW operation thedrivepowershouldbe reduceduntilthe platecurrentis 400 mA or less ForSSBoperation the modulation crestshouldnotexceed 400 mA platecu...
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