Features: For Yaesu FT-817/857/897 and other models for temperature-compensated crystal components, fully compatible with the original TCXO-9. The frequency is 22.625MHz, which can improve the stability of the machine after replacing the original crystal. It is superior to the original module in different environments. Actual test the frequency of the crystal is observed with a high-precision frequency meter. The original crystal frequency is deflected with a fire-baked , but this temperature-compensated crystal has no obvious change, and the effect is remarkable. In general, the temperature difference between winter and summer in the northern region is large. Many machines adjust the frequency in summer and the temperature is biased in winter. Or the indoor use in winter is normal. If you go to the field, the frequency will be offset. You can solve this problem by replacing this temperature-compensated crystal. The crystal precision can reach 0.5PPM, which is consistent with the original TCXO-9 module parameters, the price is only 15% of the original module, and the cost performance is extremely high. Specification: Material: Hardware + Plastic Weight: 10g Package list: 1 * Temperature-compensated Crystal Module Installation Method: Turn off the power of the machine, open the cover of the machine, find the position where the temperature compensation crystal is installed. You need to unplug the ordinary crystal of the machine, then insert it according to the stitching of the machine. After installation, you can start using it without any settings.