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The PC86 is a purpose designed frame-grid triode for use as a UHF oscillator/mixer for Band IV and Band V television reception. Tungsram also made this valve under their own Type designation of 4CM4.

At UHF a coaxial design would normally be used for professional applications, but by connecting the electrodes to several pins the manufacturers achieve the desired result without the complications, and cost, of a disc seal valve and its mounting. Ideal for the less stringent requirements of a domestic appliance.

The anode side view.

The thin glass tube envelope is 20 mm in diameter and excluding the B9A base pins, is 47 mm long.

References: Data-sheet & ³⁰⁰². Type PC86 was first introduced in 1962. See also 1962 adverts.

Pin Connections

Absolute Maximum Operating Conditions^¶

Thanks to Frank Philipse for supplying the above PDF datasheet.