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Yankee Voltmeters | by AndyBrii
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Yankee Voltmeters

Yankee Brand Voltmeters (c1930) used to measure high voltage 'A' and 'B' batteries in early battery & portable tube valve radio sets popular from the late 1920s to the 1950s. Diameter is 50mm. Electron tube valve radios required a high voltage battery for the plate - usually 45v to 90V, and another low voltage battery for the cathode filament - typically 1.5v or 3V. From my father's radio construction days.

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Taken on September 13, 2011