hi guys , i have a strange problem in 80m when push ptt full or about middle pwr the radio change band automatically?for example 20m or change operative mode , practically goes crazy, only in 80m?this happens?, the swr is about 3 or more , the mic is original , the antenna is single harm like bb6 un un 9:1, the power supply 30 amp, when i utilize about 30w or less all is ok..... Any info about . tnx.....