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.
Temperature stabilization of crystals for high frequency stability
DAIWA CN-901-HP-3 SWR Meter CN-901HP with true peak power readout.
All Daiwa SWR meters can be selected to display average or peak power. The PEP value is found by different charge/discharge constants and therefore is not very...
ALPHA 4040 Antenna Tuner NOVEMBER TUNER UPDATE
Alpha 4040 DreamTuner
In the last 45 days, we’ve made a lot of progress on the Alpha 4040 DreamTuner. As you know, when we tested the tuner under full power, we discovered that...