Hi Guys, I want to quickly double check my understanding of filament voltage. When the datasheet specifies 13.5 +- 0.6 V, such as with the 3cx800A7, are they referring to a DC voltage? So, if I have 13.5 VAC, the RMS value, it would be just dandy, or are they referring that 13.5 V is the maximum peak value? thanks, Paul (KG7HF)