A couple of further comments regarding the statements at the AH site:
1)As I mentioned in my previous post, it follows from the second of the two statements I quoted that a "typical fuse" provides zero noise rejection. Which sounds right to me! Their first statement I quoted says that their fuse increases "high frequency noise-rejection fifty fold over that of a conventional fuse." It’s worth reflecting upon the fact that 50 times zero is still zero.
2)Regarding their statement about the 10 ohm impedance of their fuse at 10 MHz, a far more effective approach to attenuating 10 MHz noise, as well as noise at other similarly high frequencies, would be to put a suitably chosen ferrite clamp costing a few dollars around the power cord, near the IEC connector on the component. Which is not to say, though, that in a given application there would necessarily be any benefit from doing so.
Personally, I would always much prefer to see a manufacturer say something along the lines of "frankly, we don’t know why it works but it does," than to provide misleading and specious technical explanations.
Best regards,
-- Al
1)As I mentioned in my previous post, it follows from the second of the two statements I quoted that a "typical fuse" provides zero noise rejection. Which sounds right to me! Their first statement I quoted says that their fuse increases "high frequency noise-rejection fifty fold over that of a conventional fuse." It’s worth reflecting upon the fact that 50 times zero is still zero.
2)Regarding their statement about the 10 ohm impedance of their fuse at 10 MHz, a far more effective approach to attenuating 10 MHz noise, as well as noise at other similarly high frequencies, would be to put a suitably chosen ferrite clamp costing a few dollars around the power cord, near the IEC connector on the component. Which is not to say, though, that in a given application there would necessarily be any benefit from doing so.
Personally, I would always much prefer to see a manufacturer say something along the lines of "frankly, we don’t know why it works but it does," than to provide misleading and specious technical explanations.
Best regards,
-- Al