[Amps] Measuring RF Power

[TexasRF@aol.com]

I lost track of who said what/when;
 In a sine wave the average voltage is zero therefore average power is  
zero.In an ac circuit with sine wave voltage, average current is also zero. One  
could be led to think that average power is also zero?
 
There is an RMS value related to peak value divided by square root of 2;  
same as peak times .707.
There is an effective value related to equivalent d.c. value which is also  
equal to the rms value.
 
See Radio Handbook Alternating Circuits, Impedance and Resonant Circuits  
Chapter, pg 3-3 in the 23rd Edition.
 
Historically we have always referred to peak power as 1.414 times rms power  
but not sure of the basis for this. Perhaps someone else knows.
 
73/k5gw