[geoff]

On 1/09/2014 10:46 p.m., Adrian Tuddenham wrote:
k.

Correlated and in-phase, they will add to give an increase of 6dB

Yes - that's double the voltage = +6dB, double the power = +3dB.


Correlated and out of phase, they will cancel, the degree of
cancellation depending on the accuracy of the phasing and amplitude.