Regulation under glass
RCA 0D3 voltage-regulator tube from an old power supply I bought many years ago. Unlike a regular vacuum tube, this device did not have a heater filament; it was filled with a gas which ionized at a certain voltage to pass current.
The shape of the glass envelope was nicknamed “Coke-bottle” for its resemblance to the iconic soft drink container.
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Uploaded on February 20, 2017
Taken on February 19, 2017
Regulation under glass
RCA 0D3 voltage-regulator tube from an old power supply I bought many years ago. Unlike a regular vacuum tube, this device did not have a heater filament; it was filled with a gas which ionized at a certain voltage to pass current.
The shape of the glass envelope was nicknamed “Coke-bottle” for its resemblance to the iconic soft drink container.
4,299
views
33
faves
5
comments
Uploaded on February 20, 2017
Taken on February 19, 2017