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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

Collection of a member from D
Michael Seiffert (D)
Patrice Zeissloff (F)
Alexander Hofer (A)
 
roehre_lk4250_bild_1.jpg

LK4250
 
Forum contributions about this tube
LK4250
Threads: 1 | Posts: 1
Hits: 1919     Replies: 0
LK4250 (LK4250)
Ralf Keil
25.Mar.14 		  1
LK4250 (LK4250) 

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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