QH 40 A
40 °C Precision Crystal Heater
40 °C • +/- 2.5 °C
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 a inexpensive alternative to completely heated oven oscillators (OCXOs). However, the stability values of an OCXO can not be reached.
| Specifications | |
| Type | QH 40 A |
| Temperatur | 40.8 °C +/- 2,5 °C |
| Regulation accuracy | better 0.1 °C |
| Supply voltage | +8 ... 12 V DC, use stabilized voltage |
| Inrush current | typ. 80 mA |
| Dimensions (mm) | 10.5 x 14 x 3.5 |
Applications
- Temperature stabilisation 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
- Alle Angaben ohne Gewähr -
