Octode frequency changer used in radio receivers in the 1930s. 4 V indirectly heated cathode.

Essentially equivalent to the side-contact type AK2 but fitted with an American style 7 pin base for the Australian market. In Europe it was fitted with the Philips 'C' type 7 pin base.

Manufacturer: Philips, Holland.

Physical Description

Base type: American style No. of pins in base: 7 (large) Bulb shape: shouldered Bulb material: glass - gold metal sprayed Top cap

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