The 49:1 UNUN is whatever MyANTENNA sells.
I did not open it or examine it.
I took off the counterpoise and put it back on (30 ft wire) and it made very little difference since the coax itself served the function of a counterpoise.
It is fed with about 70 ft of RG213 at this moment, or I use a different 100 ft RG213 at times.
I did substitute a beefy #12 insulated wire for the light wire that came with MyANTENNA kit.
de k3eui
Barry K3EUI