Hey, what frequencies should I have programed forAO-91, AO-92, SO-50 for Tx and Rx due to Doppler shift. I was told not to worry about Tx Doppler shift.. what's the best way to program them? And do you just set a repeater shift? I'm confused on what shift to use as it goes from vhf-uhf-vhf. Or do you utilize A memory for Rx and B memory for Tx?