Antique radios, Old Time Radios

Micro-Bigril_R43

Country:	France	Brand:	Dario, Brand of SFR (Radiotechnique), France
		Developer:	Dario, Brand of SFR (Radiotechnique), France
		Tube type:	Dual-Grid Tetrode Frequency converter

Tube ID = 21480


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Identical to	Micro-Bigril_R43 = Micro-Bigril = R43
Similar Tubes	Normally replaceable-slightly different: R43M
First Series	1925 Saga of the Vacuumtube, Tyne page 402

Base	Europe "B5 big size" (D, Bigrille)
Was used by	Radio/TV-reception etc.
Filament	Vf 4 Volts / If: 0.08 Ampere / -: Direct / -: Battery = /
Description	Tyne: "Double-grid tubes came on the French market in 1924. At first they had tungsten filaments. By 1925 they were superseded by the dull-emitter version, space-charge rather than shield-grid tubes, and were first used in receivers at low anode voltage. Later they were used as frequency changers in superheterodynes. Examples of these are Métal's DG and RM, La Readiotechniaue's Micro-Bigril R43, and Grammont's Bigrille-Ampli and Bigrille BF." [EE]


	W.H. Wolfgang Holtmann

W.H.
Wolfgang Holtmann

Banneitz, TB der drahtl. Teleph. 1927
Anonymous 15 Collector

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Micro-Bigril_R43

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