Hello
these days i have seen signal readouts of 80 and 90/xx in not only PL330 but also on PL380 .These signal can cause overloads to the specific band if not to the whole spectrum .This can happen when it is connected to an external antenna via the plug or by connecting it on the telescopic antenna
This i not only for the Tescun models but also other as the XHData 108 and 808

As in result can such so high signals damage to the internal electronics?