I have done some frequency measurement testing of WWV transmissions against a not that great reference. Results are shown on https://sites.google.com/site/perseusmods/home/performance They are pretty awful even compared to a not that great reference. The Ionosphere is not friendly. Mark W7MLG On Thu, Dec 7, 2017 at 6:48 AM, Patrick Barthelow <apolloeme@gmail.com> wrote: Hello Friends, > >> > I am picking up locally a couple of vintage analog Radio Shack SW time cube > >> radios, 70s vintage, 3 switchable SW frequencies. Two types, the one > >> pictured and a Radio Shack model also that has WWV and Weather channel VHF > >> frequencies. > >> I am interested in an accurate bench test to compare the analog shortwave > >> radios time reporting > >> hopefully UT-1 against other available references. > >