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The 6CY5 is a sharp cut-off RF tetrode designed for use as an RF amplifier in VHF television tuners.

The actual electrode section is small even within the 18 mm diameter envelope.

A closer view of the grids through the side wall of the anode.

The thin glass tube envelope is 18 mm in diameter, and excluding the B7G base pins is 46 mm tall.

Reference: Data-sheet. Type 6CY5 was first introduced in 1958. See also 1958 adverts.

Pin Connections

Absolute Maximum Operating Conditions^¶

Thanks to Frank Philipse for supplying the above PDF datasheet.