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LK4250

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ID = 1381
       
Country:
Germany
Brand: Valvo GmbH, Radioröhrenfabrik; Hamburg
Tube type:  Triode, vacuum   Power/Output 
Identical to LK4250
Similar Tubes
Other class quality (otherwise equal):
  4641

Base Philips big W4 (Codex=Byy)
Filament Vf 4 Volts / If 2.5 Ampere / Direct / Specified voltage AC/DC
Description

Lautsprecher-Kraftröhre von Valvo. Entspricht der Philips 4641.

 
Information source Taschenbuch zum Röhren-Codex 1948/49   

lk4250_sock.png LK4250: Tabu Röhren-Codex, 1948
Anonymous 15 Collector

More ...

Just Qvigstad
lk4250_tech.png
LK4250: Valvo Röhrendatenblatt
Martin Steyer

Usage in Models 1= 1937

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1

Collection of

 
roehre_lk4250_bild_1.jpg

LK4250
 

Forum contributions about this tube
LK4250
Threads: 1 | Posts: 1
Hits: 1918     Replies: 0
LK4250 (LK4250)
Ralf Keil
25.Mar.14
  1

Die Röhre hat keinen UX4-Sockel, es ist ein Spezialsockel den ich nur noch von der Philips 4641 kenne. Er hat einen grossen Elektrodenabstand der zur besseren Isolation bei hohen Temperaturen dienen sollte.

 

R.Keil

 
LK4250
End of forum contributions about this tube

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