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Superheterodyne battery receiver Made in 1927-1928, probably by a small Belgian (Walloon) factory or workshop. All binding posts are situated on the control panel: on the left binding posts for the frame aerial, in the middle connectors for the different voltages, 4V, 40V and 80V, on the right jacks for headphones and loudspeaker. The arrangement of the control panel is perfectly symmetrical. Data Valves   Circuit   Serial number: None Dimensions: 29 × 61 × 30 cm Made in: 1927-1928 Purchased in: 2007 Click on a valve for more information Click on the circuit to enlarge Inside Valves from left to right: mixer, two i.f. tubes, detector, and two l.f. tubes. Situated in the middle are three adjustable i.f. circuits. Oscillator coils are by Belga, condensers and resistors by Alter, Mikado and French firm Wireless. Transformers by Cema and Transfolina (a brand name of S.B.R., Société Belge Radio-Electrique). Tuning knobs (with fine tuning) are also by S.B.R. The Transfolina l.f. transformer type T16A (1 : 2.5)   Tuning knob, page from an S.B.R. catalogue, 1928 Tuning knob with its original box

Deze pagina is voor het laatst bijgewerkt op vrijdag 18 november 2011