We replaced the two sets we got with our 2000 model class A. Had no converters anyway for the newer digital services.
I bought an amplified hanging indoor antenna that we just secure to the wall inside the unit with Velcro. It seems to work fine for us to get local over the air stuff almost everywhere and no holes to drill either. And in our case the USB powered amp powers from the back of the Vizio TV we bought for the RV that we can set almost anywhere too. https://www.amazon.com/gp/product/B00BN5Z2WM/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1