I forgot to mention one important thing in my last reply:
>From the earlier discussions on this subject I got the impression that T130-3
and T200-2 cores were suggested as alternatives to the 3C85/3C90.
The mixes #2 and #3 are powder iron, not ferrite as the 3F3 and 3C85/3C90. I
beleive they are poorly suited as power transformers on LF/MF but make good
inductors for low-pass filters on 136 and 500kHz. This is true at least for the
#2 mix. On 500kHz I remember seeing reports of severe LPF heating with the #3
mix, I will have to check again on that.
Some of the gurus please correct me if I'm wrong here. I just wanted to press
the "pause and think again" button before someone possibly orders inductor
cores to use for a transformer.
I'm still a beginner/learner in this game, the above is just how I see things
today.
73's
Paul-Henrik
Quoting "Johan H. Bodin" <[email protected]>:
> Yes, 3F3 is even better than 3C85/3C90 for power transformation at a few
> hundred
> kHz. The 3F3 cores, if coloured, are light blue. Philips sold their ferrite
> business to Ferroxcube: http://www.ferroxcube.com/
>
> 73
> Johan SM6LKM
>
>
> Paul-Henrik wrote:
> > Have a look at Ferroxcube (Philips) cores of 3F3 material. As far as I can
> > interpret datasheets for these, they should work fairly well as
> transformers up
> > to 500kHz with a DC component and up to 1MHz without DC.
>
>
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