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S50A; Siera; Eindhoven NL (ID = 497360) Radio
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S50A; Siera; Eindhoven NL (ID = 510611) Radio
Siera; Eindhoven NL: S50A [Radio] ID = 510611 600x364
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For model S50A, Siera; Eindhoven (NL)
Country:  Netherlands
Manufacturer / Brand:  Siera; Eindhoven (NL)
Year: 1938/1939 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 4: EK2 EF9 EBL1 AZ1
Main principle Superheterodyne (common); ZF/IF 128 kHz; 1 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 Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 21.5 cm = 8.5 inch
Power out
from Model: S50A - Siera; Eindhoven NL
Material Bakelite case
Shape Tablemodel, low profile (big size).
Dimensions (WHD) 510 x 290 x 235 mm / 20.1 x 11.4 x 9.3 inch
3 Band reception:
  • LW: 708 - 2000 m.
  • BC: 198 - 585 m.
  • SW: 16,7 - 51 m.
Tuning scale light bulbs type: 8045 (6,3V, 320mA).
Loudspeaker Philips type 9636. Tonecontrol.
As opposed to model S50U, this radio has low impedance connectors for an external speaker and for pick-up.
This model is comparable with Philips 470A, Tenor T50A, Jura J50A and Fenno S50A.
Net weight (2.2 lb = 1 kg) 10.2 kg / 22 lb 7.5 oz (22.467 lb)
Price in first year of sale 1'350.00 BFR
Source of data Technisch- Commercieel - Radio Vademecum Staleman
Mentioned in - - Manufacturers Literature (Siera memento of tubes and models 1932-1946)
Literature/Schematics (1) -- Original prospect or advert (Siera Radio Modèles 1939)

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

All listed radios etc. from Siera; Eindhoven (NL)
Here you find 42 models, 40 with images and 18 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.


Forum contributions about this model
Siera; Eindhoven NL: S50A
Threads: 1 | Posts: 4
Hits: 2933     Replies: 3
siera: S50A (S 50 A);
Francisc VISKY


I have a similar model: Mediator Z50A. The model was founded out in Romania in Cluj city. Who is the producer of this model? Here are some pictures:


Sandor Selyem-Tóth


Belgien export?

Front label: dealer logo?




John Hupse † 28.9.20

>>>Who is the producer of this model?

The  "Maker" is "Philips Eindhoven", see the E code on the type plate. This set was assembled at the NSF premises in Hilversum, Holland, so "NSF" is the "Manufacturer".

The  "Brand" is "Mediator".

The  "Country of Production" is The Netherlands.

The  "Country of Destination" is Switzerland

I do not know where this set was sold to the end-user, maybe in Romania. It certainly is an export model.

The Siera S50A (the Model this forum thread is attached to) is basically the same set. The differences are the "Brand" (Siera) and the "Country of Destination" (Belgium). All other parameters are the same, so this Siera S50A was not produced in Belgium. In this case RMorg shows the Country of Destination instead of the Country of Production.

Zenonas Langaitis

Dear  Francisc,  this site  maybe  for your radio  set ...


Siera; Eindhoven NL: S50A
End of forum contributions about this model