Antique radios, Old Time Radios

EF22_9pin

Country:	Netherlands	Brand:	Philips; Eindhoven (tubes international!); Netherlands
		Developer:	Philips; Eindhoven (tubes international!); Netherlands
		Tube type:	HEXODE RF/IF-Stage Controlling (mu)
			Late but no serial production. For instance only development samples. *****

Tube ID = 31596

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Identical to	EF22_9pin
Similar Tubes	Other base: EF8
Predecessor Tubes	EF8

Base	Loctal-9-Pin (B9G)
Filament	Vf 6.3 Volts / If: 0.2 Ampere / -: Indirect / -: Parallel / series AC/DC /
Description	Low noise HF preamp tube The Philips 21- "Key Base" tubes were initially designed with the 9-pin base B9G like the EF50. The later series production however was changed to the 8-pin Locktal-base B8G designed by Sylvania. Text in other languages (may differ)
Literature	- - Manufacturers Literature

EF22_9pin: original Philips documents
Jacob Roschy

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