Indoor dwelling have outside Stucco (Metal Lath) is needed to support it, gives Indoor Scanner Antennas poor performance, putting my SDS 100 on The Window ledge improves reception somewhat.
I Also have 7 aftermarket Antennas for my SDS 100 same issues, take it outside they work good.
I just went with outside antennas with good quality Coax, It’s like a brand new Radio much more Gain.