Antique radios, Old Time Radios
Polytron-4fach
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Country:
Germany
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| Identical to |
Polytron-4fach
= Politron-4fach
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| First year |
1927
Tube leaflet collection E.Erb Analysis by original leaflets
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| First Source
(s) |
Sep.1927 : Funk Bastler Heft 39
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| Base |
SPECIAL TUBEBASE in general
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| 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)
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| Information source |
Bastelbriefe der Drahtlosen 1927, H.10
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Polytron-4fach: Funkbastler 1928/01
Wolfgang Eckardt
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Polytron-4fach: Bastelbriefe der Drahtlosen, H.10/1927
Wolfgang Eckardt
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