Well I’m just going to have to be be more deliberate and careful when I do things. My Hickok 6000A tube tester DOES have a Loctal socket. So all my thrashing about went away and all the Loctal tubes tested okay. Forget all my previous inputs. But I do have a question, are the 14A7 etc, tubes 14 volt filaments or 12.6 volts? Skip W7WGM