2502

Philips Radios - Deutschland

Data
Forum
Pictures
Collections

  • Year
  • 1927/1928
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 7436
    • Brand: Deutsche Philips-Ges.

 Technical Specifications

  • Number of Tubes
  • 3
  • Main principle
  • TRF with regeneration; 1 Special; 1 AF stage(s)
  • Tuned circuits
  • 2 AM circuit(s)
  • Wave bands
  • Broadcast (MW) and Long Wave.
  • Power type and voltage
  • Storage and/or dry batteries / 4; 150; 18 Volt
  • Loudspeaker
  • - This model requires external speaker(s).
  • Power out
  • 1 W (unknown quality)
  • Material
  • Various materials
  • from Radiomuseum.org
  • Model: 2502 - Philips Radios - Deutschland
  • Shape
  • Tablemodel, with any shape - general.
  • Dimensions (WHD)
  • 310 x 180 x 140 mm / 12.2 x 7.1 x 5.5 inch
  • Notes

  • Das Modell 2502 wurde hergestellt in den NSF-Werken in Hilversum (Niederlande).

    Externer Lautsprecher 2000 ohm, meistens der Philips 2003.

    Bis zum Abschluss eines Gerätevertrages zwischen Telefunken und Philips (24. November 1931) war es Philips nicht erlaubt Rundfunkgeräte in Deutschland herzustellen. Philips-Geräte die bis dann in Deutschland verkauft wurden, sind in den Niederlanden hergestellt worden. Lorenz hat in diesen Jahren aber einige Philips-Modelle (wie Paladin) ohne Röhren importiert und mit Telefunken-Röhren in Deutschland verkauft.

  • Net weight (2.2 lb = 1 kg)
  • 4.6 kg / 10 lb 2.1 oz (10.132 lb)
  • Source of data
  • Radiokatalog Band 1, Ernst Erb
  • Picture reference
  • Eine Abbildung findet sich im Doppelband "Radios von gestern"

 Collections | Museums | Literature

Collections

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

 Forum

Forum contributions about this model: Philips Radios -: 2502

Threads: 1 | Posts: 1

The valve F215 is very difficult to find it. So I decided to replace it with E433. But there is a difference in heating voltage: for F215 is 2.5V, 1.5A and for E438 is 4V, 0,8A.

So I decided to build a small transformer from 2.5V to 4V. Calculating, I obtained: Q=2.5 cm2, n1=20 turn, 1 mm in diameter and n2=68 turn, 0.6 mm in diameter: n1 is connected to the transformer and n2 is connected to the filament of E438.

You can see in the picture attached. The only difficulty is a good shield for the transformer to have no influence in the audio circuit.

MH: I took the liberty of rendering this text anew for legibility. Regards, Mark

Attachments

Francisc VISKY, 23.Sep.07

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