Radio Antica e Radio d'epoca
Round_Type-C
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| Tipo: |
Triodo a gas Detector |
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<1925 very rare |
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| Identico a |
Round_Type-C
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| Valvole
simili |
Altra base:
2V-P1f
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| Prime serie |
1913
History of the British Radio Valve to 1940 Thrower page 32
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Evoluzioni
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Round_Type-N
Round_Type-TN
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| Zoccolo |
Swan-Bajonett B22=22 mm
2 Sidecontacts.
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| Utilizzata per |
Radio/TV-reception etc. |
| Filamento |
If 2.5 Ampere / Direct / Battery = |
| Descrizione |
Towards the end of 1911, Henry J. Round of the Marconi Company designed diode valves but suspended his work until November 1912 when he also did some work on triodes.
In Dec. 1913 he applied for a British Patent 191328413.
New was:
The grid is formed as a close (mesh) cylinder surrounding the filament. Also the anode is formed as a cylinder surrounding the grid. That was a great step foreward in electron tube developement! The grid and anode connections were from wire leads on the side of the bulb.
First successful soft valves of Round were produced in 1913. This tube was made with either E27 or B22 base.
The valve was probably influenced by the soft valve of von Lieben, Reisz and Strauss since there were some agreements between Marconi and Telefunken at that time. Type C was also used for a r.f. amplifier in direction finding equipment which went into service in 1914.
Testo in altre lingue
(può variare)
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Dimensioni
(LxAxP)
incl.pins/tip |
x x 51 mm / x x 2.01 inch |
| Bibliografia |
British Radio Valves - The Vintage Years: 1904-1925 pages 17 & 19
Saga of the Vacuum Tube, Tyne pages 207 & 208
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Just Qvigstad
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Numero
totale di modelli di Radiomuseum.org che
utilizzano questa valvola:1
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[rmxtube-en]
| Conformità dei dati |
Ulteriori informazioni |
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