I follow your ERP calculations using a high gain antenna, so can I use a Yagi with gain of 7.8 dbd considering my 50' of RG8X has a loss of 4.3 db and I keep my Xmtr power at 15 watts and not exceed 50 watts ERP on chs 15 - 22 simplex?
I calculated 41.7 db (15 watts) - 4.3db + 7.8 dbd = 44.8 db = 30 watts ERP