938A

Philips; Eindhoven (tubes international!); Miniwatt

Data
Forum
Pictures
Collections

  • Year
  • 1933
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 29588

Click on the schematic thumbnail to request the schematic as a free document.

 Technical Specifications

  • Number of Tubes
  • 4
  • Main principle
  • TRF with regeneration; 2 AF stage(s)
  • Tuned circuits
  • 1 AM circuit(s)
  • Wave bands
  • Broadcast, Long Wave and Short Wave.
  • Power type and voltage
  • Alternating Current supply (AC)
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 17 cm = 6.7 inch
  • Power out
  • 2.8 W (unknown quality)
  • Material
  • Special material, described in the notes.
  • from Radiomuseum.org
  • Model: 938A - Philips; Eindhoven tubes
  • Shape
  • Tablemodel, low profile (big size).
  • Dimensions (WHD)
  • 345 x 315 x 215 mm / 13.6 x 12.4 x 8.5 inch
  • Notes
  • Reaction coils with fixed position; feedback regulated by C13.
    Grid Detection done by first tube E438. 
    LW, BC and SW are divided in 6 ranges:
    • I. 15-33 m.
    • II. 32-90 m.
    • III. 85-200 m.
    • IV. 200-400 m.
    • V. 400-950 m.
    • VI. 950-2000 m.
    The first tube (E438) is shielded to neutralize the magnetic field of the loudspeaker.
    Housing in Arbolite, front panel in Philite (Bakelite).
  • Source of data
  • - - Manufacturers Literature
  • Literature/Schematics (1)
  • -- Original-techn. papers.
  • Author
  • Model page created by Iven Müller. See "Data change" for further contributors.

 Collections | Museums | Literature

Collections

The model is part of the collections of the following members.

Museums

The model can be seen in the following museums.

 Forum