Please click your language flag. Bitte Sprachflagge klicken.


Information - Help 
ID = 53902
Brand: Audiola, Nordisk Solar Industri A/S; Kolding
Developer: Philips; Eindhoven (tubes international!); Miniwatt 
Tube type:  Full-Wave Vacuum Rectifier   Power-supply 
  Ca. 1925 up to 1945 rare.
Identical to NVD3 = 506

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 1 Ampere / Direct
Description At the end of 1920's or early 1930's the Nordisk Solar Co. sold Philips tubes under the Audiola brand name. At least there is a tube with a label at the base with the text: Audiola, type HVD3, a/s Nordisk Solar Co. At the top of the glass is printed: Philips, 506, Miniwatt. 
Dimensions (WHD)
incl. pins / tip
50 x 116 x 35 mm / 1.97 x 4.57 x 1.38 inch
Information source - - Data from my own collection   
Peter den Boer

NVD3: own collection
Peter den Boer

from Just Qvigstad

You reach this tube or valve page from a search after clicking the "tubes" tab or by clicking a tube on a radio model page. You will find thousands of tubes or valves with interesting links. You even can look up radio models with a certain tube line up. [rmxtube-en]