 |
| Identical to |
REN704d
= U4100D
= DG4101
= E441N
= NDG4
|
| Similar
Tubes |
E441 (can normally be replaced - small diff'ce)
U1718D (Heater different)
REN1817d (Heater different)
|
| First Series |
1930 Tube leaflet collection E.Erb Analysis by original leaflets |
| Successor Tubes |
1933
E448
RENS1224
|
|
| Base |
Europe 4-Pin (A, 4A, B4, since 1914) (Codex=Eu)
Sidecontact
|
| Was used by |
Radio/TV-reception etc. |
| Filament |
-: Indirect /
-: Parallel, (AC/DC) /
If: 1 Ampere /
Vf 4 Volts /
|
| Description |
Predecessors: none, Successors / Nachfolger: E448, RENS1224, X4122
This tube is a tetrode to be used as self oscillating frequency converter. The oscillator feedback is applied to grid 1, the input signal to grid 2. Its amplification is low and not to control, the oscillator voltage is closely coupled to the input circuit.
Text in other
languages (may
differ)
|
| Tube prices |
2 Tube prices (visible for members
only)
|
| Literature |
Taschenbuch zum Röhren-Codex 1948/49
|
|
|
| |
|
| |
Rundfk. Rö. Ratheiser
Wolfgang Holtmann
|
|
|
|
JR
Jacob Roschy
|
|
Prüfkarte Röhrenprüfgerät W 18N
Jörg Kulbe
|
|
Rundfk. Rö. Ratheiser
Wolfgang Holtmann
|
|
|
