Yuri, K3BU wrote:
"Learned it to be a no-no trying to feed phased arrays with individual
amplifiers, at the same frequency."

I`m not sure separate amplifiers have anything to do with distortion
because I`ve seen distortion at certain azimuths from arrays driven by
a single amplifier.

Drive around a broadcast array with sharp nulls while listening. You
will notice severe distortion at the edges of sharp nulls. I always
attributed this to phase out of the carrier frequency at an azumuth
where the sidebands aren`t completely nulled out, and this produces the
overmodulation and distortion. It`s only a speculation to explain the
cause of an observed effect.

Best regards, Richard Harrison, KB5WZI