Sensibly equivalent¶ to:
Mullard, in 1949, describe the ECC33 as a high slope, low impedance double triode with low heater consumption, primarily intended for use in flip-flop, scaling and computer circuits. The electrode assembly is considerably smaller than other double triodes of the period.
The wide glass tube envelope is 30 mm in diameter and, excluding the IO base pins, is 67 mm tall.
References: Data-sheet & 1040. Type ECC33 was first introduced in 1949.
Absolute Maximum Operating Conditions¶
Updated January 31, 2013. shape:wide.glass.tube 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 pin:8.h