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U4100D

Information - Help 
ID = 3515
       
Country:
Germany
Brand: Valvo Radioröhrenfabrik GmbH; Hamburg
Tube type:  Dual-Grid Tetrode   Frequency converter 
Identical to U4100D = DG4101 = REN704d = E441 = E441N
Similar Tubes
Heater different:
  REN1817d ; U1718D
First year 1929 Tube leaflet collection E.Erb Analysis by original leaflets
Successor Tubes 1933   E448   RENS1224   X4122  

Base Europe 5-Pin (O5A, B5) (Codex=Fa) Sidecontact
Filament Vf 4 Volts / If 1 Ampere / Indirect / Parallel, (AC/DC)
Description Predecessors: none, Successors / Nachfolger: E448, RENS1224, X4122
By its construction this tube is a space-charging-grid tetrode, but should 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)
Literature Taschenbuch zum Röhren-Codex 1948/49   
  tubeenvdiag_kleinmisch.png
  U4100D: Rundfk. Rö. Ratheiser
Wolfgang Holtmann
 
u4100d_valvo_p01_s.jpg
U4100D: Collection Patrice ZEISSLOFF
Patrice Zeissloff

 
u4100d_sock.png
U4100D: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector

 
u4100d_daten_kennl.png
U4100D: Valvo Daten Heft 1930
Trev Levick



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