美国BIRD鸟牌负载DA10F15，DA10U15，DA10F30，DA10U30DA10UHFSeriesDA10UHFSeries,470-890MHz,DASeries,DigitalAirLoadsareforcedaircooledloadsthatprovideafullyself-containedandconvenientmeansofdissipatinglargeamountsofanalogordigitalRFpower.DigitalAirloadsrequirenoplumbing,pumpsorcomplicatedinstallationandsetupprocedures.Thefourfandesignprovidesexcellentcoolingefficiencyaswellasextremelyhighreliability.)