IIRC, the pile of punch card equipment manuals I sent to Norm Aleks included the 24/26 Operating Manual, the 24 Series Customer Engineering manual, and schematics for the 24 and 56, and Norm did solemnly promise to scan these and make them available on the Web; why not drop him a line. mike ------------Original Message---------- From: Sellam Ismail &lt;foo(a)siconic.com&gt; To: Classic Computers Mailing List &lt;cctalk(a)classiccmp.org&gt; Subject: Replacement tube for IBM 026 Printing Card Punch So I'm off to look for a 25L6 tube for my IBM 026. <snip>