[amsat-bb] Gamma match on Circular polarization antennas?

Hi,

I have read on numerous places that yaguis with gamma match must be avoided for circular polarization.

But it's my case.

I have access to cheap factory made 3 element yaguis for 2m with pretty good construction, and yes, it have gamma match.

I plan to use two of them 1/2 lambda apart and 90 degree shifted on X (V/H) and feed them in order to get either RHCP or LHCP...

Anyone has a real explanation of why I have to avoid gamma match for this?

It's really so bad, pros, cons?

Cheers to all.