Richard Clark wrote:

Spend $3.98 for an adapter.

I was right and wrong about the dish,I borrowed a adapter to try
as is and got poor results. so I took the feed apart and found out
what I thought was the radiator (the 3 sided aluminum piece) was just
a passive radiator,no actual connection. there is a dipole inside the
housing whose elements are just over 25mm. assuming its 1/4 wave that
puts it at 3ghz.. the 100mm dimension of the passive part makes sense
in light of this,it needs work but is still useable..