Stern-Radio Sonneberg, VEB, RFT; SONRA viz foto Main principle Superheterodyne (common); ZF/IF 455/10700 kHz Tuned circuits 6 AM circuit(s) 10 FM circuit(s) Wave bands Broadcast, Short Wave plus FM or UHF. Power type and voltage Alternating Current supply (AC) / 220 Volt Loudspeaker Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) - elliptical Power out 1 W (unknown quality) Material Wooden case from Radiomuseum.org Model: Brillant 6310 - Stern-Radio Sonneberg, VEB, Shape Tablemodel with Push Buttons. Dimensions (WHD) 460 x 140 x 150 mm / 18.1 x 5.5 x 5.9 inch Net weight (2.2 lb = 1 kg) 3.5 kg / 7 lb 11.3 oz (7.709 lb)