Looking for a 30/10 Meter heterodyne crystal for a Ten-Tec Argosy. The frequency marked on the crystal is 13.990 Mhz. The number on the crystal is 48031 This same frequency crystal may be used in other Ten-Tec radios. I could be talked into an oscillator board or an entire radio to get a good crystal J 73 - Dave, N4ELM