- Crystek - Crystals and Oscillators. Have some very high frequency VCOs. Mouser distributes them.
- Daishinku Corporation - Chineese crystal manufacturer - has a cheap NDK 5 x 3.2 crystal alternative: DSX530GA.
- KDS - DAISHINKU - Chineese company - manufacturer of crystals and resonators. Has some very small crystals!
- Pericom - Semiconductor manufacturer, most know for analog switches.
- RF Monolithics - RF Components
- Suntsu Frequency Control, Inc. - Brady Foster Suntsu Frequency Control, Inc. 15791 Rockfield Blvd., Unit O Irvine, CA 92618 PH: 949.305.0220 X 234
- U.S. Electronics - Buzzers, speakers, crystals, and fuses.