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Information - Help 
ID = 1352
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Tube type:  Half-Wave Vacuum Rectifier   Power-supply 
Identical to 505 = RGN1304 = V1_Visseaux = V495 = G495 = DU4 = G450 = GT138 = R4B = RRR145
Similar Tubes
Normally replaceable-slightly different:
  EG410 ; EG4100 ; G140 ; G530 ; GL4/1E ; R0446 ; VR2_Castilla
First year 1927 Tube leaflet collection E.Erb Analysis by original leaflets
First Source (s)
Mar.1929 : Funk Bastler 1929, Heft 9

Base Europe 3-Pin B3 (Eu H) (Codex=Eo)
Filament Vf 4 Volts / If 1 Ampere / Direct / Parallel, (AC/DC defined voltage)
Dimensions (WHD)
incl. pins / tip
52 x 126 x 35 mm / 2.05 x 4.96 x 1.38 inch
Weight 43 g / 1.52 oz
Information source Taschenbuch zum Röhren-Codex 1948/49   
  505: Internet
Miguel Angel Trujillo-Rodriguez
505: Sammlung KHB
Karl - Heinz Bossan

505: Telefunken Werkstattbuch
Wolfgang Bauer

505: Valvo-Röhren-Daten 1934
Jacob Roschy

from Just Qvigstad

Usage in Models 4= 1929 ; 2= 1930?? ; 2= 1930 ; 1= 1931? ; 1= 1931 ; 1= 1933??

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):11

Forum contributions about this tube
Threads: 1 | Posts: 4
Hits: 4171     Replies: 3
Tube Philips 505 Cine Sonor (.33.)
Georges Van Campenhout

Dear Radio friends,


I recently received a Philips Tube, model 505.

On top of this tube is written (see pictures)







Inside, one can clearly distinguish two diode systems!

I wonder if this is the same tube??




Jacob Roschy

Hello Georges,


since this tube has merely 3 pins, it can't be anything else then a half-wave rectifier, although two diode systems are visible. It's very likely that you can find a parallel connection inside the tube. I have very little doubt about the correct designation 505.

This method was even used in some other cases: have a look at the second picture of the rectifier type 1803 (under “more”) - and you can see a 1803 which is made in the same way. The connection between the two anodes is clearly visible.

Best Regards, Jacob



Georges Van Campenhout

Thank you, Jacob.

Indeed, looking carefully into the glass base shows that the two heaters are connected in series.

But what about the other marking: CINE SONOR?

Was this rectifier used only for cinema applications? Or is there another explanation?


Best regards





Georg Richter

Philips Eindhoven had a "Cine Sonor" department for cinema equipment production (like Siemens had a separate company "Klangfilm").

It may be that Philips tubes which are labeled "Cine Sonor" was sold for a higher price for "dedicated application", similar to the "Klangfilm" tubes which was (often) standard tubes with a different numbering system to prevent cinema operators to use cheaper tubes for replacement. As far as I know the cinema operators had to sign a contract with the cinema equipment supplier.

I do not know if those "cinema" tubes has had a higher reliability or was selected for reaching the upper limits of the specifications.

If somebody can quote a contract between cinema equipment manufacturers and cinema operators, or can provide data sheets or an advertisement folder of Philips "Cine Sonor" equipment we will know more.

Best Regards


End of forum contributions about this tube

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