100w 50 ohm resistors, overkill i know. HAHA. For such a simple circuit that an swr bridge is, i really do not understand its operation. Yeah i get the diode rectifies AC to DC and we twiddle the knobs till we get an output voltage that suits the meters or ADC we are using. Its the bit above that which does not make much sense to me, like how does the transformer separate out forward and reverse powers. That is beyond my level of comprehension. And it seems none of my books know either and seem to take it on faith that it works.