Antique radios, Old Time Radios
RMR
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| Tube type: |
Triode, vacuum |
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<1925 very rare. *** |
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| Identical to |
RMR
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| First year |
Sep.1921
70 Years of Radiotubes and V.
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| Predecessor Tubes |
I-T-E-V
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| Filament |
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| Description |
Distributed and possibly manufactrured by H W Sullivan - the "Improved Pattern Valve" Inverted bowl anode and a tapered spiral grid matching the contour of the anode. Designed to overcome the patent on the tubular anoded "R" valve. Stokes - p208
It is possible that this was manufactured by "Rivers Moore" - hence the name. "Wireless Weekly (UK) June 6 1923".
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| Information source |
70 Years of Radiotubes and V.
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RMR: Fin Stewart
Fin Stewart
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