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
DX-Patrol Converter for OSCAR-100 DX-Patrol Uplink Converter for OSCAR-100 (QO100) Geos. Satellite.
434MHz to 2400MHz Low Cost (~100 EUro) Up convertor with 100mW of RF Power to "QO-100" Satellite.
Source (Link) to DX-Patrol Company
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...