美国BIRD鸟牌1000W负载8251;8251N;8251D;8251D7-168251Series8251Series,1kW,Oil-CooledTerminationisportable,self-containedgeneralpurpose50ohmcoaxialtran***issionlineterminati***requiringnooutsidepowersourceoradditionalequipment.TheloadsareOil-assistedconvectioncoolingforsafe,continuousoperationupto1000Wfullratedpower.Theyprovideaccurate,dependable,andpracticallynonreflectiveterminationfortestingandadjustingtran***ittersundernonradiatingconditi***.Theloadc***istsessentiallyofacylindricalfilmtyperesistorimmersedinadielectriccoolant.Theresistor,individuallyselectedforitsaccuracy,isenclosedinaspecialtaperedhousingwhichprovidesalinearreductioninsurgeimpedancedirectlyproportionaltothedistancealongtheresistor.Thisserieshasincludes8251Dand8251D7-16modelsforDigitalBroadcastVSWR=1.065max.,470-860MHz)