Today was the day, not the best of days hot and blustry but clear. Rolled down the runway and lifted off for the 1st time, have to admit I was a bit nervous and pretty shakey but into the air we went turblance and all, managed to get it straightened around and rounded the pattern for the 1st landing, kept the speed up as was suggested by the facory pilot and came in about 80, rolled out and caught my breath and talked over the 1st flight with my A&P, Rolled out for the second flight and managed to improve my takeoff some, went around the patch again and came in just a little slower and rolled out to the terminal for lunch with the guys. After Lunch I decided to make the day a tri-fecta and went out for the third flight, take off went ok and things seemed to smooth out some but when I went to call for clearance to land i had no comm!!!! Turned on all my lights and circled outside the area for a short period to get the towers atention and then after clearing the area made a landing on 22, Rolled out to the hangar and called the tower to explain my delima and landing withour clerance, tower advised all was ok and thanked me for calling and advising my situation, fortunatly very little traffic today and none in the area at the time. Next time I will carry by hand held along as a backup. Put the airplane in the hangar and found the comm problem, the hole to the antennae was not large enough to let the connector lock into place, removed the antennae and made the hole larger, put new RTV around the antennae to prevent water leakage and tightned all back in place, comm check was lound and clear so we are ready for the next flight!