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Thread: 13.500 mhz crystals

  1. #1
    gnuuser's Avatar
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    Apr 2020
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    Default 13.500 mhz crystals

    13.500 mhz is on the ism bands generally used for things like garage door openers. and not used for general communications.
    But I have about 100 of them and what to do with them? (got them in a box of parts)
    I don't think it would be wise to use them in a cw unit because they might make door openers go nuts!
    too much blood in my caffeine system.

  2. #2

    Default

    Use them as IF crystals in a low power mixing stage followed by a filter.

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