Where did you get that idea? I've designed (from scratch) almost every amplifier I've ever used on the air, and still have four of them. I've published the construction articles, and you can find them on line, complete with schematics, parts lists, and many photographs. Give up. February 1985 issue of CQ magazine shows me and a friend (KT2B) inspecting my workmanship on my new 4-1000A homebrew (and fully home-designed) 1500W 6m amplifier. That was a full construction article with lots of photos, schematics, parts lists, etc. in a different issue. I still have that amp, it still runs 1.5kW output power, the anode runs bright red key-down at 1500W out (same tube since 1984), and I tune it up entirely by watching output power and grid current. It's the only way to assure it's properly loaded.