Talk:Radio Crystal Identification

identifying scanner crystals

If you have a crystal scanner available, even if the frequencies in question are not in use in your area, you can at least determine which type of scanner they are for, using the local oscillator. Plug in a crystal (VHF high-band), then look for a signal 10.7 or 10.8 below the marked frequency. For 154.430, listen on or around 143.73 (-10.7) and 143.63 (-10.8) with a second scanner.

I'm not too sure about the lowband crystals. They are probably fundamental, high-side injection. For 46.12, you'd check 56.82 (+10.7) and 56.92 (+10.8) if you have a receiver to cover that range.

references

• Police Scanner Crystal Interchangability Information Reference from Ken's Electronics