Sensibly equivalent¶ to:
The CV1053 is a variable-mu RF pentode, with variable screen characteristics, for use as a controlled RF or IF amplifer. The frequency range of operation would be up to 30 MHz.
As a commercial valve the CV1053 can be seen as the Mullard EF39 and the two exhibits have identical dimensions suggesting a common production line.
The reverse is plain zinc metal paint screening.
The classic envelope is 29 mm in diameter and excluding the IO base pins it is 84 mm long.
References: Datasheet, 1040 & 1043. Type CV1053 was first introduced in 1939.
Absolute Maximum Operating Conditions¶
Updated October 10, 2015. shape:classic construction:pinch type:pentode age:1930.1940 base:io heater:6.3v pins:8 pin:1.m pin:2.h pin:3.a pin:4.g2 pin:5.g3 pin:6.- pin:7.h pin:8.k pin:tc.g1