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S172; Siera; Belgien (ID = 1329945) Radio S172; Siera; Belgien (ID = 1328766) Radio
S172; Siera; Belgien (ID = 1364499) Radio S172; Siera; Belgien (ID = 1364500) Radio
S172; Siera; Belgien (ID = 1364501) Radio S172; Siera; Belgien (ID = 1364502) Radio
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S172; Siera; Belgien (ID = 1329945) Radio
Siera; Belgien: S172 [Radio] ID = 1329945 922x692
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For model S172, Siera; Belgien
Country:  Belgium
Manufacturer / Brand:  Siera; Belgien
Year: 1943 ? Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 6: ECH21 ECH21 EBL21 EBL21 EM4 AZ1
Main principle Superheterodyne (common); 2 AF stage(s)
Tuned circuits 7 AM circuit(s)
Wave bands Broadcast, Long Wave and Short Wave.
Power type and voltage Alternating Current supply (AC) / 110; 125; 145; 200; 220; 245 Volt
Loudspeaker Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 24 cm = 9.4 inch
Power out
from Model: S172 - Siera; Belgien
Material Wooden case
Shape Tablemodel, low profile (big size).
Dimensions (WHD) 613 x 374 x 245 mm / 24.1 x 14.7 x 9.6 inch
Tuning scale light bulbs type: unknown but 6,3 Volt certainly.
Connectors for second loudspeaker and for pick-up. 
Push-pull output stage. Chassis divided into 2 parts. Variable bandwidth with switch.
The radio is for AC mains and is prepared for DC connecting a vibrator convertor.
Comparable with Jura 172X, Mediator M163AX and Philips 925X-39

Model page created by Timo Rantasaari. See "Data change" for further contributors.

All listed radios etc. from Siera; Belgien
Here you find 435 models, 394 with images and 178 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.