I thought that I had found and published all articles I have writen for Radio Bulletin in the period 1979 to 1986. Alas, I did not. Yesterday I was looking for the Cosmicos articles by Bob Stuurman, and found in the august 1980 issue the Logitester article.
Still have and use that tester, such a handy tool for digital circuits, often just as handy as my Hameg scope. Which reminds me, some kind of logic analyser would be nice too to have. Or built myself The Fabulous Logic Analyser.
Anyway, here is the Logitester article, and this is how it looks: