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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 ; C306A ; C9_Fotos ; CY10 ; CY9 ; C_Fotos ; E406_Eagle ; E410_Eagle ; Euréka ; G409_Longlife ; G411 ; H412 ; HX412 ; He6 ; LA430C ; M300 ; N406_Eagle ; OX49 ; PR48_UX ; PV4_Ediswan ; 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
More ...
Usage in Models 1= 1925?? ; 1= 1925? ; 8= 1925 ; 2= 1926?? ; 10= 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? ; 7= 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):275
Museum "Technik-Museum.ch"

Collection of

Timo Rantasaari (FIN)
Collection of a member from D
Peter Pfeiffer (D)
Christian Schaufelberger (CH)
Ludvig Rylander (S)
Aldo Patriarca (CH)
Patrice Zeissloff (F)
Hartmut Völler (D)
Collection of a member from FIN
Collection of a member from A
Jose Luis Villabona Horreo (E)
Heriberto Tavella (RA)
Jacob Roschy (D)
Hannu Alho (FIN)
Pedro Prieto-Castro (E)
Georges Werts (B)
Ernst Erb (CH)
Wolfgang Bauer (A)
Gerhard Eisenbarth (D)
Mauro Grando (I)
Vicente Moncholi-Cebrian (E)
Thomas Lebeth (A)
John Koster (NL)
Ottmar Rollmann (D)
Bekir Yurdakul (F)
Danko Tkalec (HR)
Robert Gillespie (USA)
Gerhard Heigl (A)
Tomasz Szczesniak (PL)
Bruno Candreia (CH)
Rudolf Osterkamp (D)
 
a409philips.jpg

A409
 
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