The 501-27585-82 from Quantic Wenzel (Wenzel Associates, Inc.) is a OCXO with Frequency 100 MHz, Supply Voltage 15 V, Phase Noise -130 dBm/Hz@100 Hz to -100 dBm/Hz@10 Hz, Phase Noise 1 kHz -158 dBm/Hz, Phase Noise 10 kHz -175 dBm/Hz. Tags: PCB Mount, Low G-Sensitivity. More details for 501-27585-82 can be seen below.