The Mullard M8080 is also the CV4058, a small RF power triode for HF and low VHF working.
Another commercial equivalent is the Type 6100 that is itself equivalent to the 6C4WA.
The KB/DC identifies this valve as being made to specification K1001 or K1006, the B denotes qualification by a UK authority and the DC identifies the maker as Mullard Radio Valve Co., Whyteleafe.
The CV designation and the KB/DC make code.
The anode encloses the inner structure. The control grid supports are copper.
The thin glass tube envelope is 18 mm in diameter, and excluding the base pins is 46 mm tall.
References: Data-sheet & 1040 Type M8080 was first introduced in 1956. See also1956 adverts.
