I would expect cathode and anode RF voltage to be in phase and grid out of phase. 73 Peter -----Original-Nachricht----- Betreff: Re: [Amps] Starting up a NEW Henry amp Datum: 2023-12-13T12:18:52+0100 Von: "jim.thom jim.thom at telus.net" <jim.thom at telus.net> ( the input + output of the GG amp are in series, but 180 degs out of phase...