1925 Tube leaflet collection E.Erb Analysis by original leaflets
Base
Europe 4-Pin (A, 4A, B4, since 1914)
Filament
-: Direct /
If: 0.15 Ampere /
Vf 4 Volts /
Literature
Taschenbuch zum Röhren-Codex 1948/49
Tabu Röhren-Codex, 1948
Anonymous 15 Collector
No further Information
for
B415_Gruenberger
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