The precision crystal heater provides temperature stabilization for crystals. The circuit, which is built on AL2O3 ceramic substrate, has to be mounted on the 40 °C thermostat crystal. Then, the crystal is heated to 40.8 °C with a regulation accuracy of-better than 0.1 °C. This provides high frequency stability.
The precision crystal heater is a inexpensive alternative to completely heated oven oscillators (OCXOs). However, the stability values of an OCXO can not be reached.
Applications:
Temperature stabilization of crystals for high frequency stability
References:
- High stablility crystal oven based on the principle of zero temperature gradient
- Installation of a QH 40 A crystal heater into a standard JRC JST-245 TCVR
- Installation of a QH 40 A crystal heater into a Icom IC-746
- Installation of the QH 40 A into an Icom IC-R71E HF Receiver
- TCXO for a TS850 by VK6KDD and TK5EP
- Installation of a QH 40 A into a LT2S Transverter
- QH40A Mod for FT-847
Price: TBD