CV820 / 3S4 power amplifier pentode
See also CV484 which also carries the 3S4 marking.
*: At Va=90, Vg2=67.5, Vg1=-7.
**: Pin1 is filament -ve for 2.8V operation; pin 5 is -ve for 1.4V where pins 1 and 7 are filament +ve.
This file was last modified
15:49:57, Tuesday September 02, 2014
FOR SALE: Note that any valve which is not CV marked is now for sale. Contact me via email - see the home page.