Not sure if anybody else may have noticed, but Fair-Rite has data and kits on 3 new ferrite mixes fairly recently, designed for power in various parts of the HF spectrum. (and below)
https://www.fair-rite.com/wp-content/uploads/2018/02/HFPowerFlyer.pdfGoing uplink from there, there's more detail in other papers. Might be good choices for the Class D and E fan(atics)...
Edit: on further observartion, seems they've been annouced for over a year, but the engineering kits and more info on 79 and 80 mixes came out last month.
