>BTW: I usually associate CRT anodes with MUCH >higher voltages, could you have meant 3KV? No those voltages sound about right for that tube. It is an economy tube for hobbyist use, IIRC a 3" round face. Bear in mind that it is 500V across the tube. The high resolution flat face ones do have higher voltages to get the higher resolution trace. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist