Valve Gallery - Diodes (2) 

Valves: AC/DD4A, EB34, 6H6, EB91.

Shown above is a AC/DD4A, from rarely seen manufacturer Radio Record.  B5 base with 4v heater.  Height of 112mm, two diodes are contained within this envelope. Shown above is a Mullard EB34.  6.3v heater and International Octal (I.O.) base.  81mm height.  Two diodes are contained within the envelope.  

Shown above is an 6H6 of American manufacture. The smallest valve I know of using an International Octal (I.O.) base, at just 42mm height.  Two diodes are contained within the metal envelope. Shown above is a Mullard EB91.  B7G base and all glass envelope.  6.3v heater, two diodes contained within envelope.  Height of 54mm.

Continue to the Output Valves gallery pages   

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