12AT7 6U8 6BE6 12AU7 6BA6 6AU6 12AT7 6AU6 6AL5 12AU7 12AU7 5881 5881 5U4GA 6X4
Main principle is Super-Heterodyne (Super in general). Wave bands Broadcast (BC) and FM or UHF.
Detail Power type and voltage Alternating Current supply (AC) / 110 Volt. Loudspeaker – This model requires external speaker(s). Power out 30 W (unknown quality). Model: Festival D-1000 – Harman Kardon; New York. Material Metal case. Shape Tablemodel, Mantel/ Midget/ Compact up to 14″ width, but not a Portable (See power data. Sometimes with handle but for mains only). Dimensions (WHD) 350 x 170 x 280 mm / 13.8 x 6.7 x 11 inch.
The Harman Kardon model Festival D-1000, a FM-AM tuner and top-quality 30 watt amplifier, is the first Hi-Fi receiver with a combined technique of the Williamson amplifier plus an Ultra Linear output stage. As far as we know the Williamson amplifier was not patented and could be used freely. General Electric produced a 30 watt amp like this but with the original KT66 tubes. Reception of the Festival D-1000 is FM 88 – 108 MHz and AM broadcast 550 – 1650 kHz.