Antique radios, Old Time Radios

A425

ID = 2453

Country:

Netherlands

Brand:	Philips; Eindhoven (tubes international!); Miniwatt
Developer:	Philips; Eindhoven (tubes international!); Miniwatt
Tube type:	Triode, vacuum Universal
	Ca. 1925 up to 1945 rare.

Identical to

A425 = RE034 = A22 = PM3DX

Similar Tubes

Normally replaceable-slightly different:

1-425 ; 407W ; 410HF ; 410RC ; 4AAF1 ; 4AFF1 ; 4B3_Ultron ; AF_Castilla ; C25 ; D502 ; DT4_Triode ; G425_Longlife ; H4 ; L307 ; M350 ; OX254 ; V3030 ; W4 ; W412

Other base:

A425_UX

First year

1926 Tube leaflet collection E.Erb Analysis by original leaflets

First Source (s)

1925 : Saga of the Vacuumtube, Tyne p.421

Base	Europe 4-Pin (A, 4A, B4, since 1914) (Codex=Eo)
Filament	Vf 4 Volts / If 0.06 Ampere / Direct / Battery =
Description	Also available with UX4 base.
Tube prices	1 Tube prices (visible for members only)
Literature	Babani, International Radio Tube Encyclopaedia Taschenbuch zum Röhren-Codex 1948/49 - - Manufacturers Literature

A425: My collection.
Sandor Selyem-Tóth

A425: Telefunken Werkstattbuch
Wolfgang Bauer

A425: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector

Usage in Models

1= 1926? ; 8= 1926 ; 3= 1927?? ; 5= 1927? ; 23= 1927 ; 3= 1928?? ; 4= 1928? ; 27= 1928 ; 4= 1929?? ; 4= 1929? ; 27= 1929 ; 2= 1930?? ; 3= 1930? ; 24= 1930 ; 2= 1931? ; 7= 1931 ; 5= 1932

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):152

Collection of Pedro Prieto-Castro (E)

Collection of Michael Gnaedig-Fischer (MEX)

Collection of Wolfgang Bauer (A)

Collection of Karl - Heinz Bossan (D)

Collection of Bo Samuelsson (S)

Collection of Sandor Selyem-Tóth (H)

Collection of Alan Scott Douglas † 16.11.15 (USA)

Collection of Timo Rantasaari (FIN)

Collection of Michael Mischke (D)

Collection of Jean-Jacques Pontigny (F)

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