This replacement crystal is designed as an accessory for XRB SR FM receiver modules that use a 40.665MHz tuning element. It provides the exact frequency component to restore or check the receiver's FM channel when original crystals become worn, damaged, or when a spare is required for bench testing.
Compatibility is centred on XRB SR FM receivers; confirm your receiver's crystal footprint and frequency marking before fitting. Installation usually involves removing the old crystal from the receiver PCB and soldering the new unit into the same footprint. If you do not have experience soldering small RF parts, seek help from a technician familiar with receiver work.
During setup and tuning, a correctly tuned crystal helps stabilize receiver lock and simplifies reception troubleshooting. Use standard receiver test procedures to verify signal lock and antenna performance after fitting.
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