The 501-27514-36 from Quantic Wenzel (Wenzel Associates, Inc.) is a OCXO with Frequency 100 MHz, Supply Voltage 12 V, Phase Noise -130 dBm/Hz@100 Hz to -100 dBm/Hz@10 Hz, Phase Noise 1 kHz -155 dBm/Hz, Phase Noise 10 kHz -167 dBm/Hz. Tags: PCB Mount, Thru-Hole. More details for 501-27514-36 can be seen below.