Crystal oven
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A crystal oven is a temperature-controlled chamber used to maintain the quartz crystal in electronic crystal oscillators at a constant temperature, in order to prevent changes in the frequency due to
An OCXO inside an HP digital frequency counter
Miniature crystal oven used to stabilize the frequency of a vacuum-tube mobile radio transmitter
PCB-mounted OCXO from 2016
Some of the earliest crystal ovens. These precision 100 kHz oven-controlled crystal oscillators at the US Bureau of Standards (now NIST) served as the frequency standard for the United States in 1929.
Crystal oscillator
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A crystal oscillator is an electronic oscillator circuit that uses a piezoelectric crystal as a frequency-selective element. The oscillator frequency is often used to keep track of time, as in quartz
Crystal oven
…A crystal oven is a temperature-controlled chamber used to maintain the quartz crystal in electronic crystal oscillators at a constant temperature, in order to prevent changes in the frequency due to variations in ambient temperature. An oscillator of this type is known…
A miniature 16 MHz quartz crystal enclosed in a hermetically sealed HC-49/S package, used as the resonator in a crystal oscillator.
Quartz crystal resonator (left) and quartz crystal oscillator (right)
Very early Bell Labs crystals from Vectron International Collection