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PR3

Information - Aide 
ID = 41466
       
Pays:
Royaume Uni
Fabricant: PR (P.R.) Valves, P.R. Products, Ltd.; London
Type:  Triode, vacuum   Audio Frequency 
Identique à PR3
Première source
1929 : - - Manufacturers Literature

Culot Europe 4-Pin B4 (Eu A, E, 4A) 1914
Utilisé par Radio/TV-reception etc.
Chauffage Vf 2 Volt / If 0.095 Ampère / Direct / Battery =
Description

Z=15k ohms; Amp Factor =8

Some confusion surounds the type number prefix of p. R. tubes. Some tubes located have a paper label stating GPR3 and GPR4, for example. Wirless World October 9, 1929 does show this. tHe tube review of Wireless World, November 1927 shows the prefix as being PR--   

 
Bibliographie - - Manufacturers Literature   
Wireless World (The), London (WW, 79)   October 9, 1929 & November 27, 1929

b4_base_pins~~305.png PR3: Fin Stewart
Fin Stewart


Just Qvigstad

Collection de

 
pr_g.p.r.3_nvm.jpg

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