150B3 @ The Valve Museum

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150B3

Sensibly equivalent^¶ to:

CV287 GTR150M/S QS150/15

See also:

CV287 Priming Anode

Extras ▼

Mullard The Hampshire Collection

The 150B3 is a miniature voltage stabiliser and this exhibit also has CV287 on the envelope as an overprint.

The striking Voltage is 170 and for burning currents of 2 - 10 mA the regulation is 5 Volts. The electrode at pin 4 is the priming anode and it should draw no more than 500 μA.

The CV287 on the reverse.

The thin glass tube envelope is 18 mm in diameter and, excluding the B7G base pins, is 85 mm tall.

References: Data-sheet. Type 150B3 was first introduced in 1957. See also 1957 adverts.

Pin Connections

B7G	1	2	3	4	5	6	7
	k	k	k	pa	a	a	a

Absolute Maximum Operating Conditions^¶

Stabiliser	Va	mAa
	150	2-10

Thanks to Frank Philipse for supplying the above PDF datasheet.

Updated September 14, 2025.

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