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SG210_early

Informazioni - Aiuto 
ID = 77984
       
Stato:
Gran Bretagna (Regno Unito)
Produttore: Cossor, A.C.; London
Progettista: Cossor, A.C.; London 
Tipo:  Tetrodo con griglia schermo   Audio Frequency 
  <1925 very rare
Identico a SG210_early
Evoluzioni SG210  

Zoccolo Base on each end.
Utilizzata per Radio/TV-reception etc.
Filamento Vf 2 Volt / If 0.18 Ampere / Direct
Descrizione

Basing upon its look and on the few data printed on the label, it should be an improved version of the Marconi-Osram S625, with dull emitter for low-power battery operation. According to data on the label the Cossor S.G.210 operates at 90 volt anode voltage and just requires 2 volt at 0.1 amperes for the filament.

Probably it can be dated around 1927 or 1928, shortly later replaced by the single base version.

 
Bibliografia -- Collector info (Sammler)   

Collezione di

 
sg_210hf_02r.jpg

SG210_early
 

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