Sensibly equivalent¶ to:
The CV5077 is a PL81 in UK service form, physically it is identical to the PL81. It was designed for universal mains television sets, i.e. without a mains transformer and with the heaters on a series chain. Parameters given are for a pair in push pull audio service, but this was never the design use.
As a line output valve in monochrome television service, the design use, the peak anode surge voltage is 7,000 Volts. The anode dissipation is 8 Watts.
The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 71 mm tall.
References: Datasheet & 1040.
Absolute Maximum Operating Conditions¶
Updated October 16, 2013. shape:thin.glass.tube construction:all.glass type:pentode age:1950.1960 base:b9a heater:300ma pins:9 pin:1.ic pin:2.g1 pin:3.k pin:4.h pin:5.h pin:6.ic pin:7.ic pin:8.g2 pin:9.g3 pin:tc.a