"Ian Stirling" wrote in message
...

Actual real RMS watts.

Grrr - this is a common and seemingly self-perpetuating error. You don't
mean RMS watts, you mean mean (i.e. average) watts, for a sine wave, into a
resistive load. You mean the product of the RMS output voltage and current
into the load. This is the average value of the power delivered - the
'heating power' in other words. That's the whole point of using RMS values
for voltage and current, but it's nonsensical to talk about "RMS power".

--
Andy