Hello Matti, Brian and others, Thanks for the info about the OCXO. Think I will carefully 'dremel' it open to find out. The enclosure is brass so should be possible to solder it later. Regards, Wolf
Hello Wolf, About the 10MHz oscillator you asked I can only give a hint, that QK in rombic means Quarzkeramik, the German company which locates in Stockdorf. The company belongs now to Vectron Group.