I am in process of rebuilding a 160 meter Inverted-L antenna for some RTTY work this winter. I am trying for center freq of 1.825 with 25 on each side (for 1.800 to 1.850 usable) but may only get 25 total that would restrict me to 1.812 to 1.837. What frequency is customarily used for RTTY contests? Dick, AA5VU