Perhaps the thread should really be titled "The last of the Plate Modulated 1000 watt tube transmitters". John Lyles wrote: > Wasn't the 828C1 Power Rock (later Continental 314R1) their last tube > 1 kW? It had a single 3-500Z class S (PDM) modulator with a pair of > the same for RF. I think it was circa 1980 or 79. > John Lyles