Fuses do affect sound, the question is how much

[3dbinCanada]

The fuse is a non-linear resistor at high current. If you don't recognize LO as local oscillator (absent in a crystal radio) I suppose anymore discussion is pointless.

Its been a while ..30 years or so for me. No point in being rude.

 

[tomelex]

I ran a very simple simulation using a single voltage source with ideal 0.1-ohm output resistance, an ideal 8-ohm load, and a series resistance of another 0.1 ohms using a SPICE H-source and series 0-V voltage source to emulate a resistor whose value changes (to avoid "is modulated by") the current through it. This is a common way to model an ideal noiseless resistor in simulation so is something I've done "forever" when I need such a thing (for instance to get circuit noise without source/load resistors).

Schematic:
View attachment 62182

Result with H1 (ideal resistor) set to fixed 0.1 ohms (spurs are high because I did not bother trying to tighten tolerances and such):
View attachment 62183

Repeated with H1 changing with current to model a simple fuse'ish, no time constant/cap, just to show what can happen -- notice how the second harmonic has popped up:
View attachment 62187

This is not a real-world situation but is just to show that a series resistance changing (varying, "modulating") with signal current can add distortion.

HTH - Don

Saaweeet Don, your to the point answers like this are always a big help to this site, amazing how many folks in audio do not understand how non linearitys produce harmonics. Good lesson for those who want to learn. hopefully we got the fuse can cause small distortions thing wrapped up now!

 

[audio2design]

Now simulate an undersized fuse acting as a PTC and reducing DC ripple and AC harmonic distortion.

 

[MDAguy]

Ok, you all have me sold on audiophile fuses now... so what brand / type do I want to buy without going off the deep end with $150 a piece fuses! ??

 

[SIY]

“Audiophile” fuse is an indicator of scam. There really is no such thing other than as a fetish. Just size the fuse properly and that’s all you need.

 

[egellings]

Supply rail fuses should have very little, if any effect on sound quality. Speaker fuses may effect sound quality, but I would not put a fuse in that location. If I did have a speaker fuse, I'd have the feedback loop include the fuse to correct for its effects. If I recall, the Hafler DH-500 amp did that. There needs to be a relatively high Z around the fuse to keep the amp from having a nervous breakdown when the fuse blows.

 

[RayDunzl]

Ok, you all have me sold on audiophile fuses now...

Without even reading what was said, I suspect you are misinterpreting what you read.

so what brand / type do I want to buy without going off the deep end with $150 a piece fuses! ??

In electrical engineering, IEC 60269 is a set of technical standards for low-voltage power fuses.[1] The standard is in four volumes, which describe general requirements, fuses for industrial and commercial applications, fuses for residential applications, and fuses to protect semiconductor devices. The IEC standard unifies several national standards, thereby improving the interchangeability of fuses in international trade. All fuses of different technologies tested to meet IEC standards will have similar time-current characteristics, which simplifies design and maintenance.

IEC 60269-1 – Low-voltage fuses – Part 1: General requirements
IEC 60269-2 – Low-voltage fuses – Part 2: Supplementary requirements for fuses for use by authorized persons (fuses mainly for industrial application) – Examples of standardized systems of fuses A to I
IEC 60269-3 – Low-voltage fuses – Part 3: Supplementary requirements for fuses for use by unskilled persons (fuses mainly for household and similar applications) – Examples of standardized systems of fuses A to F
IEC 60269-4 – Low-voltage fuses – Part 4: Supplementary requirements for fuse-links for the protection of semiconductor devices
IEC 60269-5 – Low-voltage fuses – Part 5: Guidance for the application of low-voltage fuses
IEC 60269-6 – Low-voltage fuses – Part 6: Supplementary requirements for fuse-links for the protection of solar photovoltaic energy systems

 

[audio2design]

Given the popular rainbow fuses seem to blow a lot more than normal I expect they have little adherence to IEC specs for fuses at least for rating and/or lack thereof.

 

[egellings]

Fuses are a good item for tweekos to exploit. They're cheap, and can be gussied up with claims and sold for big money. I have an idea for a new tweek. (I am misspelling "tweak" on purpose because I'm firing for effect). How about the idea of audiophile-grade levels for the speakers and other components? A leveled speaker or amp is a good sounding speaker or amp! These levels would be cryogenically treated for extra effect.

 

[Harmonie]

Fuses are a good item for tweekos to exploit. They're cheap, and can be gussied up with claims and sold for big money. I have an idea for a new tweek. (I am misspelling "tweak" on purpose because I'm firing for effect). How about the idea of audiophile-grade levels for the speakers and other components? A leveled speaker or amp is a good sounding speaker or amp! These levels would be cryogenically treated for extra effect.

There are a lot of these in the 50 and up to 199$/Pce

 

[mhardy6647]

did "we" do this already?
well, in case "we" didn't...

 

[Harmonie]

did "we" do this already?
well, in case "we" didn't...

130amp for a bottle opener ?
Do you have the value for this particular one ? (@restorer-john ; )

 

[Killingbeans]

130amp for a bottle opener ?

I looks more like the pull-tab from a beverage can

 

[restorer-john]

Do you have the value for this particular one ? (@restorer-john ; )

It's multi value as it does corks too!

These are the best bottle openers for very old, soft and degraded corks in aged red wine. You can extract the entire cork in one piece very easily.

 

[mhardy6647]

130amp for a bottle opener ?
Do you have the value for this particular one ? (@restorer-john ; )

View attachment 97025

That's not a fuse. THIS is a fuse.

Too cheap Oz-humour?

 

[mhardy6647]

It's multi value as it does corks too!

View attachment 97033

These are the best bottle openers for very old, soft and degraded corks in aged red wine. You can extract the entire cork in one piece very easily.

That's the kind we use at our house (FWIW). Every so once in a while, though, we (OK... I) end up pushing an old, soft, etc. cork into the bottle.

 

[scott wurcer]

It's multi value as it does corks too!

These are the best bottle openers for very old, soft and degraded corks in aged red wine. You can extract the entire cork in one piece very easily.

Also known as a "cheating butler".

 

[SIY]

It's multi value as it does corks too!

View attachment 97033

These are the best bottle openers for very old, soft and degraded corks in aged red wine. You can extract the entire cork in one piece very easily.

Why do you have this sitting on a container of pus?

 

[scott wurcer]

Why do you have this sitting on a container of pus?

That looks like a free logoed cutting board. There is a restaurant in Tokyo with Kewpie in every dish including desert.

 

[SIY]

That looks like a free logoed cutting board. There is a restaurant in Tokyo with Kewpie in every dish including desert.

Ok, a pus logo.