@fettle
Please see this post to find out the RF noise your location has. This will help you to decide if you need a filter.
Do I Need A Filter?
IMPORTANT NOTE:
The above how-to tells to use following command:
sudo apt-get install python-pil
This command fails in Raspberry Pi OS Bookworm and Trixie as python-pil has been replaced by python3-pil in their repositories.
Please use following command:
sudo apt install python3-pil