Antique radios, Old Time Radios

ECH21_9pin

Country:	Netherlands	Brand:	Philips; - Eindhoven; Netherlands
		Developer:	Philips; - Eindhoven; Netherlands
		Tube type:	Triode-Heptode Frequency converter Controlling (mu)
			Late but no serial production. For instance only development samples. *****

Tube ID = 31595


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Identical to	ECH21_9pin
Similar Tubes	Other base and data slightly different: ECH21
Predecessor Tubes	ECH3
Successor Tubes	1941 ECH21

Base	Loctal-9-Pin (B9G)
Was used by	Radio/TV-reception etc.
Filament	Vf 6.3 Volts / If: 0.2 Ampere / -: Indirect / -: Parallel / series AC/DC /
Description	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. Note the small heater current by 0.2 A compared to the later ECH21 with circa 0,34 A. Text in other languages (may differ)
Literature	- - Manufacturers Literature

original Philips documents
Jacob Roschy

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ECH21_9pin

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