Antique radios, Old Time Radios

ECH21_9pin

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

Tube ID = 31595

previous | next

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)
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

ECH21_9pin: original Philips documents
Jacob Roschy

You reach this tube or valve page from a search after clicking the "tubes" tab or by clicking a tube on a radio model page. You will find thousands of tubes or valves with interesting links. You even can look up radio models with a certain tube line up. [rmxtube-en]