Two general purpose triode on a display block. This type of valve has a filament designed for economical operation from a 2 volt accumulator via a rheostat. Low current drain (150 mA) was emphasised by use of the then new trademark: "Miniwatt". 1.6 to 1.8 volt directly heated cathode.

One of the valves was sectioned by Museum curator J. C. Liddy.

Physical Description

One valve is intact; conical glass bulb. American style 4 short pin (UV) base with plated metal shell mounted on display block. The other valve is of the same type, but with most of its bulb removed to show a cylindrical triode structure mounted horizontally on a glass pinch. .

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