 |
| Identical to |
451
|
| Similar
Tubes |
GG4 (can normally be replaced - small diff'ce)
G203 (can normally be replaced - small diff'ce)
|
| First Series |
1926 Tube leaflet collection E.Erb Analysis by original leaflets |
| First Source
(s) |
Mar.1929 : Funk Bastler, Der 1929, Heft 9
|
|
| Base |
Europe 4-Pin (A, 4A, B4, since 1914) (Codex=Eo)
|
| Filament |
If: 2.8 Ampere /
Vf 2 Volts /
|
| Literature |
Taschenbuch zum Röhren-Codex 1948/49
|
|
|
|
|
|
HS
Heinz Schmidt
|
|
Philips Pocketbook
Christian Schaufelberger
|
|
Valvo Röhrentaschenbuch 1957
Michael Schlör
|
|
|
