AM/FM Broadcast Radio Antenna

I have tried two store-bought RCA antennas that don’t work… All I want is a simple AM and FM, indoor broadcast band antenna that works.

All-Band Radio Antenna – Is there such a thing?

I own a National Panasonic D49 multi-band radio receiver. It has three antenna connections on the back.  They are for the AM, FM and Shortwave radio bands, and each connector is for a 75 Ohm cable.
I connected each one to a 3 set TV splitter and now have a short piece of RG6 looking for [...]