The 501-25795 from Quantic Wenzel (Wenzel Associates, Inc.) is a OCXO with Frequency 10 - 7000 MHz, Supply Voltage 15 V, Phase Noise -96 dBm/Hz@100 Hz to -78 dBm/Hz@10 Hz, Phase Noise 1 kHz -113 dBm/Hz, Phase Noise 10 kHz -131 dBm/Hz. Tags: Module with Connectors. More details for 501-25795 can be seen below.