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U4AB

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ID = 13104
       
Country:
Denmark
Brand: MP (M.P.), (Tube brand)
Tube type:  Triode, vacuum   Power/Output 
  Ca. 1925 up to 1945 rare.
Identical to U4AB
Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Ft)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 1 Ampere / Direct / Specified voltage AC/DC
Description

Anode 400 Volt.

On the box: Marine-Nachrichtegeräte, Abnahmestelle Nord 1, Geprüft; 7 Dec 1942

 
Text in other languages (may differ)
Dimensions (WHD)
incl. pins / tip		 50 x 123 x 35 mm / 1.97 x 4.84 x 1.38 inch
Information source Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   
1_53~~1.png U4AB: Telefunken Werkstattbuch
Wolfgang Bauer

Just Qvigstad 		direct_heated~~4.png
U4AB: own collection
Peter den Boer † 2025

Collection of

Rudolf Osterkamp (D)
Collection of a member from D
Peter den Boer † 2025 (NL)
 
u4ab_bild1.jpg

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Forum contributions about this tube
U4AB
Threads: 1 | Posts: 1
Hits: 4272     Replies: 0
U4AB (U4AB)
Ralf Keil
11.Apr.15 		  1
U4AB (U4AB) 

Entgegen dem Datenblatt beträgt die max. Anodenspannung lt. Röhrenaufdruck 500V.

 

R.K.
 
U4AB
End of forum contributions about this tube
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