 |
| Identical to |
B409
= RE134
= P410
= E1
= LP4
= L414_Tungsram
= L413
= L415_Tungsram
= TB09
|
| Similar
Tubes |
U412 (other characteristic (electr. data))
R85 (can normally be replaced - small diff'ce)
E4 (can normally be replaced - small diff'ce)
415L (can normally be replaced - small diff'ce)
YD4 (can normally be replaced - small diff'ce)
|
| First Series |
1925 Tube leaflet collection E.Erb Analysis by original leaflets |
|
| Base |
Europe 4-Pin (A, 4A, B4, since 1914) (Codex=Eo)
|
| Filament |
If: 0.15 Ampere /
Vf 4 Volts /
|
| Tube prices |
1 Tube prices (visible for members
only)
|
| Literature |
Taschenbuch zum Röhren-Codex 1948/49
|
|
|
|
|
|
Röhrensammlung
Wolfgang Bauer
|
|
Telefunken Werkstattbuch
Wolfgang Bauer
|
|
RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector
|
|
|
