Other early innovators in quartz crystal oscillators include G. W. Pierce and Louis Essen.
Crystal Palace | The Crystal Palace | Crystal Palace F.C. | Billy Crystal | Crystal Palace National Sports Centre | Crystal Gayle | Crystal Palace, London | Indiana Jones and the Kingdom of the Crystal Skull | Crystal Cathedral | crystal | The Crystal Method | Crystal Lewis | Waterford Crystal | Crystal Waters | the Crystal Palace | David Crystal | Crystal, Nye County, Nevada | Crystal Eyes | Crystal City, Texas | Billy Crystal's | The Bird with the Crystal Plumage | Sabato's Crystal Ball | New York Crystal Palace | Lisa Crystal Carver | liquid crystal | Crystal Springs Reservoir | Crystal Springs Dam | Crystal River | Crystal Lake, Illinois | Crystal City |
A single design of PCB (printed circuit board) provides crystal oscillator regulated power for both 33⅓ rpm and 45 rpm operation, and is offered with a choice of enclosures and installation kits to suit different makes and models of turntable, such as the Linn Sondek LP12, as well as certain models from Rega, Thorens, and others.
When a crystal oscillator starts up, its frequency is not constant, which causes the clock frequency to be non-constant.