Antique radios, Old Time Radios

5-443H

Country:	Netherlands	Brand:	Thermion; Netherlands
		Developer:	Thermion; Netherlands
		Tube type:	Vacuum Pentode Power/Output
			Ca. 1925 up to 1945 rare.

Tube ID = 51776

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Identical to	5-443H
Similar Tubes	Normally replaceable-slightly different: E443H
Production stop	Feb.1938

Base	Europe 5-Pin (O5A, B5)
Filament	Vf 4 Volts / If: 1.2 Ampere / -: Half indirect / -: Parallel / series AC/DC /
Description	To avoid the Philips penthode patent, Thermion calls it a tetrode because the surpressor grid is connected to the grid instead of the kathode/filament. Nevertheless, this is a plug-in replacement for the E443H. Literature: magazine Thermion Nieuws of may-June 1935.
Literature	- - - - - - - - - - - -

5-443H
Peter den Boer

5-443H: own collection
Peter den Boer

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