Fuse Orientation

Posted by: Filipe on 26 November 2017

I went on the factory tour organised by my dealer on 24 November. It was interesting and we had the fortune to have Jason take us round. He has a wealth of knowledge and we learned lots of interesting things. One new to me was that besides the cables being directional so are the fuses within the IEC connector and perhaps even the mains plug! Jason went as far as to say that it is a big difference. The orientation is defined by the end which has the kite mark. It’s another case of something that is not in the user guide or at least not in my Power Supplies user guide.

So if you have ever had to change the fuse take note of the orientation of the old one assuming the box is new enough to have never had its fuse changed or the glass did not shatter as mine did.

I would hate to give the wrong information so I won’t tell you which way. Perhaps Richard Dane will.

If you have ever noticed the SQ difference yourself then why not reply. Also if you have SQ issues you might like to try this one for yourself once we agree the correct orientation.

Hope this helps.

Phil

Posted on: 26 November 2017 by Richard Dane

Phil, it's all to be found in the FAQ...

p.s. One caveat is that it appears that it may be that the opposite way around is best if you're "down under". I did some listening tests with Chris Murphy many years back and confirmed.

Posted on: 26 November 2017 by Filipe

Richard Dane posted:
Phil, it's all to be found in the FAQ...
p.s. One caveat is that it appears that it may be that the opposite way around is best if you're "down under". I did some listening tests with Chris Murphy many years back and confirmed.

Thank you Richard. I did search but did not find the entry in FAQ. It is

https://forums.naimaudio.com/topic/equipment-fuses

Comments welcome on SQ differences including down under!

Phil

Posted on: 26 November 2017 by Japtimscarlet

Now that's something I didn't know about!!

Thanks

Posted on: 26 November 2017 by Allante93

Filipe posted:
Richard Dane posted:
Phil, it's all to be found in the FAQ...
p.s. One caveat is that it appears that it may be that the opposite way around is best if you're "down under". I did some listening tests with Chris Murphy many years back and confirmed.

Thank you Richard. I did search but did not find the entry in FAQ. It is
https://forums.naimaudio.com/topic/equipment-fuses
Comments welcome on SQ differences including down under!
Phil

Under Equipment fuses:

"As for which way round to fit it, Jason Gould advised as follows:

If the kite safety mark is embossed on the edge of the of the fuse's conductive cap the fuse value should point towards the bottom of the fuse holder. Should the kite mark be embossed on the very end of the fuse's cap then the fuse value should face the top of the fuse holder."

Allante93!

PS. Thanks for the caveat, Richard!

Posted on: 26 November 2017 by allhifi

An oldie (but goody -lol) would be for those with bi-wire capable loudspeakers using a single-run of speaker cable; connect to the opposite (lower or higher) terminals and listen ...

Posted on: 26 November 2017 by audio1946

WHOW the art of new technology

Posted on: 27 November 2017 by jon h

Posted on: 27 November 2017 by Hmack

jon honeyball posted:
<Roger Moore Raised Eyebrow mode = ON>

I decided to check this out using my incredulity meter (a handy little thing, but becoming more & more difficult to get hold of). The results suggested that that two raised eyebrows would be even more appropriate, and much easier to boot.

Posted on: 27 November 2017 by Huge

Primarily I suggest the orientation of the fuse should be along the fuse-holder rather than across it!

Posted on: 27 November 2017 by Innocent Bystander

At the risk of epening a whole new can of equipment setup and cable dressing worms, or area to experiment with - does it make a difference if the power supply is arranged so that the fuse is oriented nort-south as opposed ti east-west?

Posted on: 27 November 2017 by Eoink

Huge posted:
Primarily I suggest the orientation of the fuse should be along the fuse-holder rather than across it!

I find that I can’t fit it in the holder beside the iron nail.

Posted on: 27 November 2017 by Huge

Don't you find that unobtanium plated titanium nails sound better!

Posted on: 27 November 2017 by Filipe

Eoink posted:
Huge posted:
Primarily I suggest the orientation of the fuse should be along the fuse-holder rather than across it!
I find that I can’t fit it in the holder beside the iron nail.

Some of you may poke fun at it, but according to Jason they check and double check the fuse orientation at the factory because it does make a big enough difference. He sounded pretty serious to me rather than tongue and cheek. If you accept that other cables have directional properties then a fuse is just another bit of wire.

The last laugh is on me if you are missing out!

Phil

Posted on: 27 November 2017 by Innocent Bystander

Allante93 posted:
Filipe posted:

Under Equipment fuses:
"As for which way round to fit it, Jason Gould advised as follows:
If the kite safety mark is embossed on the edge of the of the fuse's conductive cap the fuse value should point towards the bottom of the fuse holder. Should the kite mark be embossed on the very end of the fuse's cap then the fuse value should face the top of the fuse holder."

Interestingly that is the vertical orientation, not the horizontal (assuming fuseholder in a horizontal plane). Surely horizontal orientation, and so directionality along the fuse wire, would be more likely to have an effect rather than which side of the fuse is up or down?

Posted on: 27 November 2017 by G. Warminger

Where’s Peter Belt when you need him?

Posted on: 27 November 2017 by Huge

Gone to look for his braces...

Posted on: 27 November 2017 by Happy Listener

G. Warminger posted:
Where’s Peter Belt when you need him?

Oh, we've been here before!

https://forums.naimaudio.com/topic/peter-belt?page=1

Posted on: 27 November 2017 by Filipe

Perhaps more believable than fuse orientation, Jason informed us that keeping a Statement system powered up adds £600/year to the electric bill!

Phil

Posted on: 27 November 2017 by hungryhalibut

If that’s true they should be pretty ashamed of themselves. Our fridge freezer costs £17 a year to run and the whole gas and electric bill is only just over £90 a month. Naim have sold a Statement 7.1 system to somebody so presumably that’s about £150 a month. Bonkers.

Posted on: 27 November 2017 by james n

Filipe posted:
Perhaps more believable than fuse orientation, Jason informed us that keeping a Statement system powered up adds £600/year to the electric bill!
Phil

If you can afford a Statement etc etc...

But i must agree with HH. That's more expensive than our yearly electric bill !

Posted on: 27 November 2017 by Innocent Bystander

james n posted:
Filipe posted:
Perhaps more believable than fuse orientation, Jason informed us that keeping a Statement system powered up adds £600/year to the electric bill!
Phil
If you can afford a Statement etc etc...

Unless you've scrimped and saved your last penny and eschewed all other luxuries to buy it secondhand...

That estimate of cost suggests quiescent current must be about 500w. Sounds like strong bias into class A. However, 500w of heat emitted continuously is likely to be an issue too, likely requiring aircon in the summer - though heating the house in winter!

Presumably unless there is a low current standby mode one just turns it off between sessions, simply turning on up to an hour before use - as indeed I do with my power amps.

Posted on: 27 November 2017 by Stephen Tate

Crikey, it's like owning a super car and then moaning how much fuel it drinks, you can't have something for nothing - it's impossible.

Posted on: 27 November 2017 by hungryhalibut

You are right of course, but with a need to minimise global warming it seems rather excessive. I guess you could have a fully renewable electricity supply, like we have, then it would only be the cost issue. And then, as you say, you’d swallow the running costs as part of the cost of ownership.

Posted on: 27 November 2017 by Innocent Bystander

Stephen Tate posted:
Crikey, it's like owning a super car and then moaning how much fuel it drinks, you can't have something for nothing - it's impossible.

Not a valid comparison unless you run the supercar 24hrs a day to keep the engine warm!

Posted on: 27 November 2017 by Japtimscarlet

I found wiring in a dedicated line BEFORE the meter helps keep costs to a minimum.....