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A409

Information - Help 
ID = 2019
       
Country:
Netherlands
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Developer: Philips; Eindhoven (tubes international!); Miniwatt 
Tube type:  Triode, vacuum   Universal 
Identical to A409 = PM3X = 1-409 = Spheria
Similar Tubes
Normally replaceable-slightly different:
  407A_Eagle ; 4AF ; 4B06 ; 4B1_Ultron ; 4N08 ; A4 ; A4.06 ; A408_Philips ; AZ409 ; C9_Fotos ; Euréka ; G409_Longlife ; G411 ; H412 ; HX412 ; M300 ; OX49 ; PR48_UX ; R75 ; RD509 ; RO4109 ; S1010 ; TM-DT1 ; UX406 ; V1010
Other base:
  A409_Tfk-4pin ; A409_UX-4pin ; PR48
First year 1925 -- Collector info (Sammler)
First Source (s)
1924 : Saga of the Vacuum Tube, Tyne p.421
22.Jan.1926 : Radio Luistergids, The Netherlands New as replacement for A410 and A406
Successor Tubes PR48_UX  

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Eo)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.06 Ampere / Direct / Battery =
Description

The German "Codex 1948" lists the A409 as Valvo but it is a Philips and Valvo never produced it.

 
Text in other languages (may differ)
Dimensions (WHD)
incl. pins / tip
x 90 x 44 mm / x 3.54 x 1.73 inch
Weight 40 g / 1.41 oz
Tube prices 5 Tube prices (visible for members only)
Information source - - Manufacturers Literature   
L'ABCDaire des lampes de TSF des jeunes années   p. 20
-- Collector info (Sammler)
Taschenbuch zum Röhren-Codex 1948/49

1_2.png A409: Telefunken Werkstattbuch
Wolfgang Bauer

More ...

Just Qvigstad
a409_spec.png
A409: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector

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Usage in Models 1= 1925?? ; 1= 1925? ; 8= 1925 ; 2= 1926?? ; 9= 1926? ; 30= 1926 ; 6= 1927?? ; 12= 1927? ; 52= 1927 ; 8= 1928?? ; 25= 1928? ; 44= 1928 ; 7= 1929?? ; 8= 1929? ; 27= 1929 ; 5= 1930?? ; 5= 1930? ; 9= 1930 ; 1= 1931? ; 6= 1931 ; 1= 1933 ; 1= 1934 ; 1= 1935?? ; 1= 1935 ; 1= 1941 ; 1= 1944 ; 1= 9999

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):273


Collection of

 
a409philips.jpg

A409
 

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