Ralph, all, A good comprehensive site for 833 tube data is www.svetlana-dot-com. Or more specifically: http://www.svetlana-dot-com/docs/products/glass/833A.html Several other varities are also listed there and available for download in the Adobe Acrobat .pdf format. Glenn > > David, > I get zilch results for URL: > http://www.pond-dot-net/%7Edavidt/webdoc2.htg/Tube%20coil/Staccato.htm > > Is this correct? Thank you. > Ralph Zekelman > >