Synergistic Red Fuse ...

TheAudioTweak 5-21-2017
Hanging on this hair thin element is an 8 gauge power cord ..what kinda battle of scale and competing forces is that one. Just a projected image..Tom

That is a good point. And the resistance of a typical mains fuse will in fact be a bit higher than the resistance of an 8 gauge power cord of typical length. But to provide some perspective from a quantitative standpoint:

The combined resistance of the hot and neutral conductors of a six foot 8 gauge power cord is about 0.0075 ohms. A 6.3 x 32 mm Littelfuse series 313 glass fuse rated at 5 amps and 250 volts has a specified "cold" resistance (i.e., its resistance when conducting negligible current) of 0.0214 ohms. The resistance of the fuse will presumably rise slightly when conducting a typical amount of current, say 2 amps for a fuse having a 5 amp rating. So let’s call its resistance 0.04 ohms. (That would seem to be a reasonable assumption given that 0.04 ohms is almost exactly the same value that is indicated in the HiFi Tuning paper for a "standard" 5 amp 6.3 x 32 mm ceramic fuse when conducting 3 amps). 0.04 ohms x 2 amps results in a voltage drop of 0.08 volts. The 0.0075 ohm resistance of the 8 gauge power cord x 2 amps results in a voltage drop of 0.015 volts, substantially less than the voltage drop of the fuse.

Therefore if the incoming line voltage is 120 volts, the 8 gauge power cord would reduce the voltage seen by the component to 119.985 volts. The Littelfuse would reduce it further to 119.905 volts.

Will the overall reduction of approximately 0.1 volts have audible consequences? It seems unlikely, considering that at most locations line voltages probably fluctuate a good deal more than that from time to time, especially between daytime and nighttime. But I suppose it could conceivably be marginally significant in some cases, especially if the particular component being powered does not have regulated DC power supplies (as in the case of most power amplifiers).

On the other hand, though, **even if** the 0.1 volt drop does have audible consequences, if the line voltage at the particular location happens to be higher than the voltage the component was designed to sound best at (presumably 120 volts in the case of most components that are intended to be used in the USA and other 120 volt countries), that voltage loss might actually be advantageous. And the somewhat lower resistance of the HiFi Tuning 6.3 x 32 mm 5 amp Gold Cryo fuse (about 0.013 ohms when conducting 3 amps, as indicated in their comparison test paper) might actually be disadvantageous.

Regards,
-- Al

A fuse that’s old and has seen many switch on cycles will have far more effect " top link", same fuse, new on the left after many cycles far right.
Just put in a new quality $2 fuse as Almarg has "bottom link" to. And you’ll have what a new >$100+ fuse will give.

https://i.stack.imgur.com/0uqWX.jpg

http://www.digikey.com/products/en/circuit-protection/fuses/139

Cheers George

theaudiotweak
So would the vacuum of LIGO be able to prevent electron motion and its resulting vibration generated externally from an alternating current on a filament inside a fuse?

>>>>>>>The LIGO vacuum is intended as another seismic vibration *stage* - it’s not a cure all. If you wish to prevent 60 HZ hum in AC power cord or in the fuse just use *damping*. It’s not rocket science. Whereas robust vibration isolation is more complicated, no so easy. In fact that’s precisely what a lot of the modern audiophiles fuses use to address vibration - damping. Hel-loo! That’s why you will see in the HiFi Tuning data results ceramic fuses generally sound better because they don’t vibrate as much as glass. I myself would never think of leaving fuses undamped, same goes for anything carring a signal that is vulnerable to vibration, or that produces vibration, you know, like transformers and capacitors. But I digress. I’m not telling you anything you don’t know, one trusts.

Theaudiotweak
While the ac signal is not the smallest or largest wave motion it is the first in line of the many that will follow. Heck many audio companies claim the source is the most important of signals...could it be the ac fuse..is so vital as it is the first component inside most audio devices.
Hanging on this hair thin element is an 8 gauge power cord ..what kinda battle of scale and competing forces is that one. Just a projected image..Tom

>>>>>>If you’re worried about induced vibration of some kind use damping. You’ve got much bigger problems with external vibration and vibration produced by motors and transformers. Case solved. Just because a signal is a wave doesn't necessarily mean it vibrates. 

Geoff ,

Certainly you must remember I don't use fuses they were replaced long ago with magnets in 2008 and they don't have a filament that will vibrate and they are not damped but they are direct coupled ..I was just checking..to see if you were still reading from the same old set of cue cards..and you are. 

I don't use damping materials in my system. Everything is direct coupled. My speaker drivers are damped by their surrounds and those will soon be augmented with devices to reduce and remove reflected interference. You cannot achieve this with damping. Damping is an overused term and a work around for the real solutions..keep looking 

The LIGO system cannot be a reality in an active household. Example turning on the bathroom fan to remove the after effects of compression waves generated..both will generate shear waves in your LIGO system which is now out of its own protective vacuum...

 Tom

 

Al,

Thanks for your knowledge and response!

The answer to find a better fuse might be in some dynamic testing method which you may have some knowledge of rather than just the standard heat rise and current capacity that I have read about.

Tom