Thanks VE1Bill,
I guess the loop antenna has poor efficiency in this case (at 433Mhz) because the radiation resistance will be so much less than the skin effect resistance, because of the small loop size.
Most of the designs I see use quarter wave loop antennas.
Since these designs are very inefficient in this frequency range, high Q and so difficult to match, I was wondering if anyone had experience building/employing an alternative antenna type for this frequency band?
Look forward to any...