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QP21

Information - Help 
ID = 16232
       
Country:
Great Britain (UK)
Brand: Marconi-Osram - (Valves/Tubes); GB
Tube type:  Double Pentode   Power/Output 
Identical to QP21 = VR35
Similar Tubes
Normally replaceable-slightly different:
  240QP
Successor Tubes CV1035  

Base British-7-Pin, old (M7A) (Codex=No)
Was used by Radio/TV-reception etc.
Filament Vf 2 Volts / If 0.4 Ampere / Direct / Battery =
Information source Taschenbuch zum Röhren-Codex 1948/49   
  uk_qp21_ckt.png
  QP21: Mfg. data sheet
Jay Kinnard
 
qp21_2.jpg
QP21: FC
Frank Cuffe

 
uk_qp21_base.png
QP21: Mfg. drawing
Jay Kinnard

 
qp21_spec.png
QP21: Marconi Advertisement
Anonymous 15 Collector


from Just Qvigstad

Usage in Models 5= 1934 ; 2= 1935 ; 1= 1936? ; 3= 1936 ; 1= 1937? ; 4= 1937

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):16


Forum contributions about this tube
QP21
Threads: 1 | Posts: 2
Hits: 1128     Replies: 1
wrong tube type
John Koster
23.Dec.16
  1

This is a pentode, not a triode...

Otmar Jung
23.Dec.16
  2

Thank you for the hint.

 
QP21
End of forum contributions about this tube

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