PC97 @ The Valve Museum

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PC97

Sensibly equivalent^¶ to:

4FY5

See also:

Valves and their Habits - The PC97 - a tutorial

Extras ▼

Brimar TV Valves from David Hollins Other PC97 exhibits

The PC97 is an RF amplifier triode. It has a high mutual conductance and could be used as a signal pre-amplifier. Its design use would be in domestic television receivers.

The PC97 is a frame grid triode that in addition to a very high mutual conductance of 13.00 mA/V has an unusually low grid to anode capacitance of about 0.5 pF. This low capacitance is obtained by using a special shield between grid and anode in conjunction with a shaped anode. Because of this shield that is in place except in the active cathode to anode region these valves are also known as Beam Triodes. An additional benefit is that the neutralising capacitor can be connected to ground on one side.

The anode side view.

The thin glass tube envelope is 18 mm in diameter and, excluding the B7G base pins, is 47 mm tall.

References: Data-sheet & ¹⁰⁴⁰. Type PC97 was first introduced in 1961. See also 1961 adverts.

Pin Connections

B7G	1	2	3	4	5	6	7
	k	g1	h	h	a	s	k

Absolute Maximum Operating Conditions^¶

Triode	Vh	Ah	Va	Vg	mAa	gm
	4.5	0.3	135	-1	11	13

Thanks to Frank Philipse for supplying the above PDF datasheet.

Updated February 26, 2014.

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