 |
| Identical to |
B442
= R81
= DZ2
= B442/A
= TB42
|
| Similar
Tubes |
S100 (can normally be replaced - small diff'ce)
S410 (can normally be replaced - small diff'ce)
DS1_Thermion (can normally be replaced - small diff'ce)
4GAF (can normally be replaced - small diff'ce)
A4GAE (can normally be replaced - small diff'ce)
4AC (can normally be replaced - small diff'ce)
B442M (other base)
B442/O (other base)
B442_SERIE_100 (Heater different)
S409 (can normally be replaced - small diff'ce)
|
| First Series |
1927 Tube leaflet collection E.Erb Analysis by original leaflets |
|
| Base |
Europe 4-Pin (A, 4A, B4, since 1914) (Codex=Er)
|
| Was used by |
Radio/TV-reception etc. |
| Filament |
-: Direct /
-: Battery = /
If: 0.1 Ampere /
Vf 4 Volts /
|
| Literature |
Taschenbuch zum Röhren-Codex 1948/49
|
|
|
|
|
|
CA
Christian ADAM
|
|
Telefunken Werkstattbuch
Wolfgang Bauer
|
|
RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector
|
|
|
