04-07-2017, 10:06 AM
There is an important lesson as well. The engineer who got a lot of very negative feedback on Amazon had been misunderstood due to American terminology. This thing about grids never having positive bias stuck in my mind months ago. The American writer and self taught radio engineer was challenged by a uni student and called plain wrong. Yet once you look at all the class A, AB, AB1, 2 and C circuits it becomes clear we don't always add or subtract from a fixed DC bias. So for me there was too much boxing in of definitions. In short, watts can go beyond 4 times the signal and a grid can drive into positive in some power circuits. Even taking that aside, surely "positive" is sometimes relative. - 5 is more negative than -3 but one value is more positive?
