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ID = 31312
Great Britain (UK)
Brand: Mullard Radio Valve Co. Ltd.;
Tube type:  Voltage Regulator, single   Power-supply 
Identical to M8224 = CV4028 = 0B2WA
Similar Tubes
Other class quality (otherwise equal):
  0B2 ; 108C1 ; CV1833

Base Miniatur-7-Pin-Base B7G, USA 1940

Special Quality Voltage Stabiliser Tube
Nominal burning Voltage: 108V
Operating current range: 5 to 30mA.
Voltage regulation over above current range: 3.5V
Maximumum regulation resistance: 140 ohms
Typical Voltage stability (% per 1000 hours): +1.0

Made by Philips and/or by Philips owned marks, as Amperex, Mullard, Valvo.

Mechanically robust version of 108C1 for use in areas of vibration and shock.

Dimensions (WHD)
incl. pins / tip
19 x 67 x mm / 0.75 x 2.64 x inch
Information source - - Manufacturers Literature   Mullard 1957

M8224: Telefunken, Spezialröhren 1962/63
Anonymous 10 Collector
    More ...
m8224_so.png M8224: ARRL Handbook 1972
Anonymous 10 Collector

Just Qvigstad
M8224: Manufacturer's Literature
Emilio Ciardiello

More ...

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