I am planning to build a linear amp around a grid driven 4-400 tube. Can anyone suggest where I can find a suitable circuit with component values. I would like band-switching for 80, 40 and 20 meters. I will be driving it with a 25 watt carrier output rice box on AM. I don't like the one in the ARRL 1967 handbook because it requires you to open the lid and physically change taps on the coil and change tuning capacitors. I don't have any other older handbooks. Thank you.
Ed K6UUZ
