The
thyratron is a sealed glass cylinder filled with a gas (usually an inert gas, hydrogen or mercury vapor) and containing at least three electrodes--a cathode, an anode and a grid--inside it [10].
The
thyratron tube dimmer, developed by George Izenour at Yale, was controlled by a mechanical remote control console, which could be installed in a location from which the operator could actually see the stage.
Dunham, "Solid state switches for high frequency operation as
thyratron replacements", Pulsed Power Conf (PPC), 2013 19thIEEE, vol.
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The high voltage supplied to the capacitive circuit is discharged through the 40 k[ohm] resistors and the food cell load at a certain pulse frequency controlled by the pulse generator and
thyratron switch.
"Under the guidance of Mr Wilcox, head of the electrical engineering department, we attempted on three or four evenings a week to understand the lectures on direct current machines and the mysterious subjects called alternating current and
thyratron valves.
Compounding this expense would have been 16 weeks of lead-time, while
thyratron production would be cut 25%, with only three of the four modulator kits in operation.
One of the unusual features of the auditorium is the barrel-vaulted ceiling, with color-changing "sunset" coves using a General Electric
Thyratron dimming system (which was also in place until the 1999 renovation).
Examples include the shift from
thyratron tube dimmers to SCR dimmers, and, within SCR dimmers themselves, the shift to high-density dimmer racks.