美国BIRD鸟牌负载
DA40-5U15，DA40-5U30，DA40F15，DA40F30，DA40U30

DA40 UHF Series

DA40 UHF Series, 470-890 MHz, DA Series, Digital Air Loads - are forced air cooled loads that provide a fully self-contained and convenient means of dissipating large amounts of analog or digital RF power. Digital Air loads require no plumbing, pumps or complicated installation and setup procedures. The four fan design provides excellent cooling efficiency as well as extremely high reliability.