PC88 @ The Valve Museum

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PC88

Sensibly equivalent^¶ to:

4DL4

See also:

PC88 - UHF Tuner Valve - Making a Mullard Valve - Valves and their Habits - Mullard Triodes for UHF Tuners - PC86 and PC88 Advert - PC86 and PC88 Advert - AA119, EH90, PC86 & PC88 Advert

Extras ▼

Mullard Terry Collard Valve Collection Other PC88 exhibits

The PC88 is a UHF triode designed for the front end RF amplifier in Band IV and Band V television tuners. Mullard describe the PC88 as: a UHF frame-grid grounded grid amplifier triode.

Our other Mullard PC88 is British made and has gold plated pins, this exhibit has plain pins and carries the pejorative origin of Foreign.

The construction is planar. The flattened cathode has a frame grid surrounding it. Even under magnification the grid wire strands are very hard to see. Beyond the grid is a square U channel anode with its flat end to the grid. The approach to a minimizing the lead inductance is to use multiple pins for the grid connection. The relatively high anode current was employed to reduce noise.

The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 40 mm tall.

References: Data-sheet & ¹⁰⁴⁰. Type PC88 was first introduced in 1962. See also 1962 adverts.

Pin Connections

B9A	1	2	3	4	5	6	7	8	9
	g1	k	g1	h	h	g1	g1	a	g1

Absolute Maximum Operating Conditions^¶

Triode	Vh	Ah	Va	Vg	mAa	ra	gm
	3.8	0.3	160	-1.25	12.5	4,800	13.5

Thanks to Frank Philipse for supplying the above PDF datasheet.

Updated February 03, 2019.

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