Hi Barry, I'm a TEK nut myself, and have just remembered that I have a copy of this service manual. I could copy and fax the relevant pages, you can then decide to do or not to do it. Apart from this: To completely calibrate an oscilloscope is not an easy undertaking (ask me, I was a developer for years), and even if you have all the necessary gadgets at hand. OTOH, the scope is a TEK, one of the finest, and most of mine work very well even after 40 service years. So instead of calling it a full-fledged calibration you can very easily check on timing and voltage levels displayed. Another easy test is to measure the supply voltages. Even TEK makes a distinct difference between a functional check and a complete calibration! My 0.02 EURO... :-) Greets Jochen Feldhaar DH6FAZ Barry Michels schrieb: > > I just got a model 564 dual-trace scope (a local college was throwing it > away). This thing probably weighs around 100 lbs or more! > > Any idea how to calibrate it? There's no manual... > > Thanks > > -- > http://www.piclist.com hint: The list server can filter out subtopics > (like ads or off topics) for you. See http://www.piclist.com/#topics -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.