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S37U; Siera; Belgien (ID = 1915850) Radio S37U; Siera; Belgien (ID = 1024463) Radio
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S37U; Siera; Belgien (ID = 1915850) Radio
Siera; Belgien: S37U [Radio] ID = 1915850 457x885
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For model S37U, Siera; Belgien:
private collection
Country:  Belgium
Manufacturer / Brand:  Siera; Belgien
Year: 1934 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 6: FC13 or CK1 VP13A or CF2 2D13 or CB1 SP13 or CF7 Pen26 or CL2 UR1 or CY1
Conflicting model year with tube data.
The model date contradicts tube dates. [ CF7 (1935)]
Main principle Superheterodyne (common); ZF/IF 104 kHz
Wave bands Broadcast (MW) and Long Wave.
Power type and voltage AC/DC-set / 110-240 Volt
Loudspeaker Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 21 cm = 8.3 inch
Power out
from Model: S37U - Siera; Belgien
Material Wooden case
Shape Tablemodel, high profile (upright - NOT Cathedral nor decorative).
Dimensions (WHD) 350 x 410 x 215 mm / 13.8 x 16.1 x 8.5 inch
2 Band reception:
  • LW: 760 - 1900 m.
  • BC: 200 - 550 m.
Tuning scale light bulbs type: 2 x 8046 (6V, 500mA).
Loudspeaker Philips type 4283. Connectors for second loudspeaker and for pick-up. 
S37U has a varnished walnut and marquetry cabinet.
The model with CF7 instead of SP13 appeared only in 1935.

Attention: chassis connected to the mains !

Net weight (2.2 lb = 1 kg) 9.8 kg / 21 lb 9.4 oz (21.586 lb)
Price in first year of sale 2'395.00 BEF
Source of data -- Original prospect or advert
Mentioned in - - Manufacturers Literature (Siera memento of tubes and models 1932-1946)

Model page created by John Koster. See "Data change" for further contributors.

All listed radios etc. from Siera; Belgien
Here you find 434 models, 393 with images and 178 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.