Nonoise 3-25-2017The salient paragraph of Auxinput’s post, which you quoted in this thread on 3-9-2017, was:
I posted ’auxinput’s’ contribution from another thread earlier about how the signal is about 98% A/C voltage and no one has shot that down yet. Glossed over maybe, but not disputed.
Taking that into consideration (at the very least), doesn’t it leave open the ’weak link’ aspect of the fuse?
In a power amp circuit, the output transistors have to create massive gain (turning a 1V input into something like 15-100 watts or more). It has to use the A/C power coming in to create this voltage, so your signal is actually something like 98% A/C voltage.Obviously just about all of the power that is put out by an amplifier (or any other AC-powered component) is **derived** from the AC power that is provided to the component. However, saying that does not provide any kind of meaningful explanation as to how an AC mains fuse may exert an audibly significant effect on the output signal of the component, given all of the intervening circuitry that is present, that is (or at least should be) designed to minimize the sensitivity of that output signal to differences in the incoming AC. And it certainly does not provide such an explanation that would stand up when analyzed quantitatively, or that can even be analyzed quantitatively. Or (as I’ve said in earlier posts) that would explain the high degree of consistency of the reported benefits, among components that are completely different in design, that perform completely different functions, that are used in very different systems, and that are powered by AC having very different voltage and noise characteristics.
Simply asserting that a fuse may be a weak link in some way is not an explanation that would be viewed as meaningful by the court of electrical engineering. Which is not to say that a ruling by that court is definitive. It is to say, however, that the proffered explanation is not definitive either, or even meaningful.
Best regards,
-- Al