The clock radio is extremely clean, with no cracks in the plastic case. The clock keeps perfect time. The radio when turned on has a loud hum. All the tubes light up, which makes me believe that the resistors need replaced. Superheterodyne (common); ZF/IF 455 kHz; 2 AF stage(s). Power type and voltage. Alternating Current supply (AC) / 60 Hz, 117V = 110 -120 Volt. Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 4 inch = 10.2 cm. Plastics (no bakelite or catalin). Tablemodel with Clock (Alarm-) Clock Radio. 12.5 x 6 x 5.75 inch / 318 x 152 x 146 mm.