Antique radios, Old Time Radios
R_Marconi
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Country:
Great Britain (UK)
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Brand:
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| Tube type: |
Triode, vacuum Universal |
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| Identical to |
R_Marconi
= TM
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| Similar
Tubes |
Other shape (e.g. bulb type):
R_England
Normally replaceable-slightly different:
ES4
; RA_Mullard
Other class quality (otherwise equal):
R5V
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| First year |
1922
Saga of the Vacuum Tube, Tyne page 380
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| Predecessor Tubes |
TM
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Successor Tubes
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1925
R5V
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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 4 Volts / If 0.7 Ampere / Direct / Battery = |
| Description |
British version of the French TM of 1916. Tubes originally branded
Marconi's Wireless Telegraph Co. From the formation of the M O V co Ltd in 1919, the brand was changed to Marconi Osram. Tipless bakelite base versions of the tube were made from late 1925
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Dimensions (WHD)
incl. pins / tip |
x 118 x 55 mm / x 4.65 x 2.17 inch |
| Weight |
52 g / 1.83 oz |
| Tube prices |
8 Tube prices (visible for members
only)
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| Information source |
Saga of the Vacuum Tube, Tyne 1925 Brown Brothers Catalog 217
The Saga of Marconi Osram Valve 20 page references
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R_Marconi: rtt
Anonymous 10 Collector
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Just Qvigstad
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Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):12
Collection of
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Variants
Gleicher Sockel, gleiche Daten, andere äussere Form.
In 'The Saga of Marconi Osram Valve‘ von Vyse & Jessop wird sie auf Seite 55 als ‚pear-shaped‘ R-type beschrieben.
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