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Ferrite core diameter effect

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Hi.. two ferrites with same composition (e.g. T50-2 & T68-2) and same no. of turns.. but have different diameter as 0.5inch & 0.68inch.. what effect will be caused by this change?? can this change be compensated by increasing or decreasing no. of turns???
 

The ferrite's Al (nH for one turn) depends on Douter/Dinner, and of course core heigth and permeability So it is not just the diameter.

A core with more volume can store more magnetic energy, so can handle more current before going into saturation.

If you have an existing design that uses the smaller core, but you have a larger one. Try to find the Al value for both cores. If your large core has Al of 80% of the small one, you need (original number of turns)*sqrt(1/0.8) turns to get same inductance.
 
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    Ow@i$

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The original question isn't clear. Are you taking about toroid cores? In this case the inductance will be proportional to core form factor area/length.
 

Yes I was talking about toroid core... What difference will it make if it was some other core??? like FT37-43 etc one's...

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actually i am designing an RF receiver front... Required core is T68-2 (Diameter 0.68 inch) with 27 turns.. but i have a T50-2 (Diameter 0.50 inch).... which will require more turns.... i guess to give same inductance... will it in any way effect the required performance after it replaces the original required core???
 

You may expect some change in self resonant frequency and power handling, as larger core can dissipate more heat before reaching unaccaptable temperature. Impact on actual application cannot be detemined without diving into the details.

you can expect large difference when using other core material. The material's datasheet can answer this question.
 

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