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S21B

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S21B; Siera; Belgien (ID = 913199) Radio
Siera; Belgien: S21B [Radio] ID = 913199 760x526
Select picture or schematic to display from thumbnails on the right and click for download.
For model S21B, Siera; Belgien:
Thanks for Jonas Gorodeckis, Kaunas, Lithuania
 
Country:  Belgium
Manufacturer / Brand:  Siera; Belgien
Year: 1938 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 4: KK2 KF4 KB2 KL4
Main principle Superheterodyne (common); ZF/IF 128 kHz; 2 AF stage(s); Reflex
Tuned circuits 7 AM circuit(s)
Wave bands Broadcast, Long Wave and Short Wave.
Details
Power type and voltage Storage and/or dry batteries / 2 & 135 Volt
Loudspeaker Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 20 cm = 7.9 inch
Power out
from Radiomuseum.org Model: S21B - Siera; Belgien
Material Wooden case
Shape Tablemodel, low profile (big size).
Dimensions (WHD) 500 x 265 x 200 mm / 19.7 x 10.4 x 7.9 inch
Notes
3 Band reception:
  • LW: 720 - 2000 m.
  • BC: 198 - 585 m.
  • SW: 16,5- 51 m.
Tuning scale light bulbs type: 8017D (2V, 210mA).
Loudspeaker Philips type 9614. Connectors for second loudspeaker and for pick-up.  There is a switch on the left of the cabinet to reduce power consumption.
 
This model is the electronic equivalent of Philips 628B and Radiola RA21B

The anode supply (B+) is defined by Siera at 135 Volt, where for the Philips 628B the  B+ battery voltage is 144 Volt. Also Cortenberghe defines the B+  at 144 Volt.

 

Net weight (2.2 lb = 1 kg) 7.5 kg / 16 lb 8.3 oz (16.52 lb)
Price in first year of sale 1'995.00 BEF
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.



  
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