TP22 @ The Valve Museum

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TP22

Sensibly equivalent^¶ to:

ARTP1 CV1344

See also:

Some Important British Valves - Mazda TP22, TP2620, AC/TP & TP1340 Valves Advert - Valves at Olympia 1934

Extras ▼

Mazda G8LSD Valve Collection Other TP22 exhibits

The TP22 is a battery triode variable μ pentode frequency changer or mixer. The triode section is designed to fulfil the function of local oscillator.

The makers lettering is still in place but most of the zinc paint screening has fallen off revealing the construction.

The triode anode is bright with ridges pressed into the metal to confer strength.

Here the triode is on the right and it has a small front to back depth of 4 mm. The larger pentode has an oval anode.

The pentode anode is also ribbed for strength.

The coiled filament tension springs of both sections can clearly be seen. A single spring for the triode and two springs for the pentode.

The classic envelope is 45 mm in diameter, and excluding the B9 base pins is 109 mm tall.

References: Data-sheet, ¹⁰⁴⁰ & ¹⁰⁴³. Type TP22 was first introduced in 1934. See also 1934 adverts.

Pin Connections

B9	1	2	3	4	5	6	7	8	9	tc
	g2	a	g3	f	f	nc	a(t)	g1(t)	m	g1

Absolute Maximum Operating Conditions^¶

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	2.0	0.25	150	150	-1	1.2	0.4	1.6M	1.3

Thanks to Frank Philipse for supplying the above PDF datasheet.

Updated May 09, 2023.

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