Is the LA501A real? In an admittedly non-exhaustive search I could not find any traces about it. The P6451 page mentions it, and so i started searching if the LA501A is a LA501 but updated to use the 6451 instead of the P6450 probe, but I could not find any information. The only way it was mentioned was wrong and corrected by me on the LA501 page, where the brochure was referred to as the "Tektronix LA501 and LA501A Brochure (PDF)" when in fact it reports on the LA501W combo.
I cant find any evidence of the LA501A existing. If you want to remove mention of it from Tekwiki, that seems reasonable. If somebody wants to reinstate it later, they can. Kurt (talk) 11:03, 23 April 2020 (PDT)