Posted by Rick Bates, NK7I on Sep 01, 2020; 11:27pm URL: http://elecraft.85.s1.nabble.com/OT-WWV-Time-Transmissions-tp7664561p7664597.html
If you model it accurately, you see that a 4:1 transformer will cause most (other than 160M) to have a closer match; while on a few the 1:1 device will work better.
If convenient, try each. They each offer (dis)advantages.