$6.95 flat rate shipping!
Flat rate shipping to USA only at this time. For international shipping please click the link below to send an email inquiry.

Likewise, if you would prefer to order offline (not using the website's "check-out" function), please send an email and we can work up the total and you can send a check.

Contact email: orders@af4k-crystals.com


Our practice is to test each crystal in several different types of oscillators. The finished crystal is subjected to mechanical stress and vibration, then tested again. The test oscillators have a frequency counter and an oscilloscope monitoring their outputs to display both frequency and the activity level of the crystal.

Defective items will be replaced at no charge.

No guarantees are made as to suitability for use in any particular project or device.

Click here to read reviews of AF4K Crystals

Click here to learn about the types of radio crystals and their history