The 6D3 is a Mazda miniature valve that houses a single signal diode. The special feature of the design is a slow heating cathode.
The thin glass tube envelope is 18 mm in diameter and, excluding the B7G base pins, is 45 mm tall.
Reference: 1040 & 3002. Type 6D3 was first introduced in 1950. See also 1950 adverts.
Absolute Maximum Operating Conditions¶
Updated January 09, 2013.