Chuck,
I looked into this half a year ago when someone asked the same question.
The answer was no. I don't remember why.
Study my material on this topic. Below 5 MHz, we need multiple turns
through a #31 core. Between 5 MHz and 6M, we need multiple turns through
#31 or #43.
Clamp-ons of either are a waste of money and do nothing at HF.
73, Jim K9YC
On Fri,2/10/2017 12:10 PM, Chuck Gooden wrote:
Fair-Rite has introduced a new low frequency material (#75), I was
wondering if someone could comment if this new material would be
better that #31 for EMI suppression.
According to the Fair-rite web site, #75 shows a higher impedance at
lower frequencies than #31 but above ~2 Mhz the impedance drops off.
While the impedance of #31 seems to continue to increase and the
frequency goes up.
I am planning on ordering some snap-it cores to reduce the noise from
switch mode power supplies, and other sources, I am experiencing on HF
bands. I have already read the documents on the K9YC web site but
there was no info on the new material. I am tempted to stay with #31
due to it's long time use.
Thanks,
Chuck K9LC
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