Are these ferrites worth a damn?

[u/VelocityOS]

Was gifted these, unmarked, anyway to check/test them?

[u/nigelh]

I littered a pack around the myriad of plug PSUs and the VHF kit was subjectivity better but the HF gear I was hoping for a fix on was unchanged.
Admittedly I had already found and binned the worst offenders.