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ID = 18589
Great Britain (UK)
Brand: Common type Great Britain tube/semicond.
Tube type:  Double Triode   Audio Frequency 
Identical to ECC33

Base Octal (Int.Octal, IO) K8A, USA 1935
Filament Vf 6.3 Volts / If 0.4 Ampere / Indirect / Parallel, (AC/DC)
Description High slope, low impedance double triode with low heater consumption, primarily intended for use in flip-flop, scaling and computor circuits. 
Text in other languages (may differ)
  ECC33: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †
ECC33: aus ebay, Verkäufer jdmsales
Gottfried Silberhorn

ECC33: Telefunken Werkstattbuch
Wolfgang Bauer

ECC33: Mullard - original papers
Detlef Narten

from Just Qvigstad

Usage in Models 1= 1948? ; 2= 1950?? ; 2= 1951 ; 1= 1953?? ; 2= 1953 ; 1= 1954 ; 1= 1955? ; 1= 1955

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):11

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