Sensibly equivalent¶ to:
The CV2523 is a double triode with special properties. The AC anode resistance is very low at 280 Ohms and the mutual conductance is considerable at 7.5 mA/V. The suggested cathode bias resistor is given as 250 Ohms.
This valve could be used in low voltage power supplies as a series pass device or it could be used for a direct drive audio amplifier. It would be useful to know its exact design use. The literature gives a single ended audio amplifier as its use.
The classic envelope is 46 mm in diameter, and excluding the IO base pins, is 105 mm tall.
References: Data-sheet & 4040. Type CV2523 was first introduced in 1946.
Absolute Maximum Operating Conditions¶
Updated October 13, 2013. shape:classic construction:pinch type:double.triode age:1940.1950 base:io heater:6.3v pins:8 pin:1.g1 pin:2.a pin:3.k pin:4.g1 pin:5.a pin:6.k pin:7.h