Hello,
I have found a bad DEC 7474 chip on my M7133 board. Clearly it is a 74<something>74 D flip flop. The problem is I don't know which modern series would be the best one to replace it with. I am sure I have seen a list somewhere of modern equivalents for some DEC chip numbers, but I can't remember where. If it helps at all, on the PDP 11/24 printset it is E78 on page K6 of the schematic (p157 of the PDF). Picture of the failed chip here: https://rjarratt.files.wordpress.com/2022/05/damaged-dec-7474-4_li.jpg Can anyone tell me what the best modern equivalent is likely to be? Thanks Rob
