The CV492 is the 12AX7 high impedance amplifier triode. The design has a high amplification factor of 100. The RCA data-sheet says the valve is suited to RC-coupled amplifiers, multi-vibrators and industrial control.The KB/AD identifies this valve as being made to specification K1001 or K1006, the B denotes qualification by a UK authority and the AD identifies the maker as Brimar - Thorn-AEI, Rochester.
The face view of one anode.The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 45 mm tall.References: Data-sheet, 3002 & 1040. Type CV492 was first introduced in 1947. See also 1947 adverts. |
