 |
| Identical to |
E448
= X4122
= RENS1224
= H425N
|
| Similar
Tubes |
B2048 (Heater different)
|
| First Series |
1933 Tube leaflet collection E.Erb Analysis by original leaflets |
| First Source
(s) |
Apr.1933 : Philips Bulletin
|
| Predecessor Tubes |
REN704d
U4100D
|
| Successor Tubes |
AK1
|
|
| Base |
Europe 7-Pin (C7A, C, 1933) (Codex=Lf)
Top contact with a cap
|
| Was used by |
Radio/TV-reception etc. |
| Filament |
-: Indirect /
-: Parallel, (AC/DC) /
If: 1 Ampere /
Vf 4 Volts /
|
| Tube prices |
1 Tube prices (visible for members
only)
|
| Literature |
Taschenbuch zum Röhren-Codex 1948/49
|
|
|
| |
|
| |
ficha de valvulas
Getulio Jimenez-Gomez
|
|
|
|
Collection TL
Thomas Lebeth
|
|
Telefunken Werkstattbuch
Wolfgang Bauer
|
|
RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector
|
|
|
