Antique radios, Old Time Radios
VT112_TKD
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Country:
Germany
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| Identical to |
VT112_TKD
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| Similar
Tubes |
Normally replaceable-slightly different:
PM3X
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| First Source
(s) |
Jul.1928 : Funk Bastler 1928, Heft 32
03.Sep.1926 : Die Sendung Heft 36
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| Base |
Europe 4-Pin B4 (Eu A, E, 4A) 1914
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 3.4 Volts / If 0.05 Ampere / Direct / Battery = |
| Description |
We see an opening in the grid and plate construction.
This was done in order to circumvent the Marconi-Round Patent filed in 1913. Later, Telefunken became owner of this patent under DRP 398968.
Text in other
languages (may
differ)
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VT112_TKD: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector
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Just Qvigstad
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VT112_TKD: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector
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