40 °C Precision Crystal Heater

The precision crystal heater provides temperature stabilisation 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 ofbetter than 0.1 °C. This provides high frequency stability.
The precision crystal heater is an in expensive alternative to completely heated oven oscillators (OCXOs). However, the stability values of an OCXO can not be reached.

Applications

• Temperature stabilisation of crystals for high frequency stability 
  

• 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

- Specifications subject to change without notice -