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In Reply to: RE: Synergistic Research Red Fuse posted by Mossback on January 08, 2016 at 18:41:24
Well,
I think Hi fi Tuning presents measurements for resistance of their fuses in order of milliohms in one direction and a difference of ++1/10 milliohms in the other direction- or to that effect. I haven't looked in a while.
These are DC measurements and are miniscule not sure at all how they could be audible when you think of the DC resistance of the HV section of a power transformer being say 3-5 ohms swamping out any effect of the fuse..
How could milliohms make an audible difference as applied directionality one way versus another? Also what relevance does dc measurements have on the ac supply in this regard.
Mysterious to me.
Love to hear any salient technical reasons why it might be true that ++ 1/10 milliohms of difference in an ac application would be audible.
I'm open to listen just need some math or physics to understand it.
Perhaps we'll hear more from others.
Follow Ups:
Can't tell whether you mean "1 to 10 milliohms" or "0.1 milliohm", but I would think that even 10 milliohms is below the resolving power of even a very good hand-held meter, like my Fluke, and if measurable, differences of that magnitude could as well be due to dirt or oxidation on the conducting surface of either the meter probe or the contact point as to actual differences in R across the fuse.
Yet, I hate to admit it, but I've heard a difference between one fuse and another, once. In that case, the expensive fuse was not as "good" as the hardware store sample. Four other well credentialed audiophiles heard exactly what I heard that particular day and time.
Hi Lew
What I am saying is less than ".1" of a miliohm or 1^-4
You are correct , a standard VOM would never capture this and the source impedance of a transformer high tension winding might be 2-5 ohms in a typical amp
It's been a while but the impedance of the power delivery transformer and wiring back to your house from the pole is probably 1 ohm!
I do hear differences in cables- I attribute it to impedance interactions over frequency- that's my story
AJ
And I do use "audiophile" fuses, albeit not the glamorous ones (Acme silver cryo in Acme silvered fuseholders), when feasible and despite my own skepticism. Some things are cheap enough to accept on faith only.
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