The 501-27829-02 from Quantic Wenzel (Wenzel Associates, Inc.) is a OCXO with Frequency 80 MHz, Supply Voltage 12 V, Phase Noise -125 dBm/Hz@100 Hz to -95 dBm/Hz@10 Hz, Phase Noise 1 kHz -150 dBm/Hz, Phase Noise 10 kHz -168 dBm/Hz. Tags: PCB Mount. More details for 501-27829-02 can be seen below.