I have several Alphas and on both of my 76a two tube it only takes about 60 watts in to get 1200 out My 76ca three tube is similar 45- 70 depending on band will drive it too 1.5 very handly Are you using a good quality meter ? I have attached a manual Martin KN4DXD Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10