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Polytron-4fach

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ID = 19033
       
Country:
Germany
Brand: Spanner GmbH, Marken: Delta Valve, Altron, Neo-Delta; Berlin
Developer: Spanner GmbH, Marken: Delta Valve, Altron, Neo-Delta; Berlin 
Tube type:  Quad Triode 
  Late but very rare. ***
Identical to Polytron-4fach = Politron-4fach
First year 1927 Tube leaflet collection E.Erb Analysis by original leaflets
First Source (s)
Sep.1927 : Funk Bastler Heft 39

Base SPECIAL TUBEBASE in general
Filament Vf 3.5 Volts / If 0.35 Ampere / Direct / Battery =
Description The Polytron (Politron) brand tubes were made by Dr. G. O. Spanner, GmbH. This company also produced dual triodes and other tubes under the Delta name. The Vierfach-Röhre uses a series filament for the 4 sections which run at .35 amps at 3.5 volts. The plates and grids are made in copper, an unusual element material for this time period. An internal shield, in the form of an X is used between the sections. The base is very special and does require a special matching socket. 
Text in other languages (may differ)
Literature Bastelbriefe der Drahtlosen   1927, H.10
  polytron_schaltprinzip.png
  Polytron-4fach: Funkbastler 1928/01
Wolfgang Eckardt
 
roehre_polytron_4_fach_bild_1.jpg
Polytron-4fach: Eigenes Bild
Anonymous 971 Collector

 
polytron_data01.png
Polytron-4fach: Bastelbriefe der Drahtlosen, H.10/1927
Wolfgang Eckardt


Collection of a member from D

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