Powder Iron app notes

I need some good app notes for choosing powder Iron cores. I used to use CWS Bytemark, but their website is AFU. I'm not even sure who the big mfgs. of iron cores is. Micrometals?

Specifically I am looking for a large core 4"-5" to run in a resonant circuit at about 1.9MHz. App notes will help me choose a material and size and number of turns to minimize loss. Application is a Class F push-pull AM ham radio transmitter. I would prefer a standard iron mix rather than any of the esoteric recipies, but hell I'll try any flavor if you tell me it tastes good.

Hello Bob,

Somewhere on there they have their booklet (in sections). I've got it in paper so I haven't looked in a while.

Consider stacking them to yield the desired saturation behavior.

Take a look at the Magnetics, Inc "Kool Mu" cores. Their high-flux ac loss is way less than powdered iron. I've smoked the paint off of Micrometals cores in switchers.

John

ditto. And I used a 50mm OD KoolMu toroid for a 2500W 100kHz transformer.

OTOH I am using some Micrometals E450 cores right now. -8 or -2 would be the go for Bob.

Cheers Terry