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Old 15th December 2006, 10:27 AM   #5061
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Quote:
Originally posted by whats gan on
i know a mate who uses pure solid
siver in stead of fuses he rekons it sounds better. but i dout it would be huge improvment

My mate Russ Andrews says he's not used fuses in his hifi plugs for over 25 year

To me it's an obvious weak link in the chain when the mains leads cost over 100 each. But ill test it and see what it sounds like. If I like it i'll look into the sub woofer fuse too for hopefully better bass

Brent
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Old 15th December 2006, 10:43 AM   #5062
poynton is offline poynton  United Kingdom
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Quote:
Originally posted by rowemeister



My mate Russ Andrews says he's not used fuses in his hifi plugs for over 25 year

To me it's an obvious weak link in the chain when the mains leads cost over 100 each. But ill test it and see what it sounds like. If I like it i'll look into the sub woofer fuse too for hopefully better bass

Brent
1m of mains lead costing 100 may be an improvement over the standard captured lead.

Surely the weak link in the supply goes much,much further - the house wiring, switchbox, supplier fuse and beyond. There are some major things about which you have no control.

Soldered-in fusewire is better than the expensive looking item you have - a six inch nail is cheaper!

Saying that the UK is one of the few countries to use plug-fuses is no excuse - they were introduced for a reason by a change in the law.


Andy

PS It does invalidate your insurance.



EDIT ... If the moderators see this, it may be removed as it goes against UK codes of practice etc.... Dangerous.
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Old 15th December 2006, 10:48 AM   #5063
awpagan is offline awpagan  Australia
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Brent
what is the mains supply rated at?
240volt 10amp

Initial turn on surge is on thing
Cable quality can be helpful, but there has to be the ponit of diminishing results.
Voltage is all relevent to earth or between to points

Me? i prefer circuit breakers

allan
ps I am not questioning your technical knowledge.
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Old 15th December 2006, 11:06 AM   #5064
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AWp - the detail that many miss is that the usual domestic mains arrangement in the UK is a ring-main (a loop of wire starting at the dis board, supporting several sockets, then returning to the dis board), not one radial per socket. Each ring is rated at 32A (usually, with 2.5mmSq wiring). This provides a very low impedance feed to support typical load diversity with an elegant economy in copper.

It also has the effect that though the connector (socket and plug) are officially rated at 13A each, the plug must be fused-down to protect the equipment and its lead, since prospective fault current in the days of fuse protection for the ring was >64A before the 32A ring fuse is guaranteed to blow.

This does not change just becasue we use MCBs now - - a 32A Class B MCB will pass >50A for 30s or so before disconnect. Thats 13Kw, way more than enough to start a serious fire, melt things, or both.

So - IMO there's no excuse for not using appropriate fuses; if your kit is so sensitive to PSU impedance that omitting fuses is audible, it's faulty...

HTH.
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Old 15th December 2006, 11:12 AM   #5065
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Quote:
Originally posted by awpagan
Brent

Me? i prefer circuit breakers

I have 16amp MCB at the fuse box

Brent
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Old 15th December 2006, 11:16 AM   #5066
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Quote:
Originally posted by poynton


1m of mains lead costing 100 may be an improvement over the standard captured lead.

Surely the weak link in the supply goes much,much further - the house wiring, switchbox, supplier fuse and beyond. There are some major things about which you have no control.

Soldered-in fusewire is better than the expensive looking item you have - a six inch nail is cheaper!



Andy


An 100+ mains lead makes a huge diff to the sound

Yes there are weak links all the way back to the distribution board. A dedicated ring is the best solution with NO RDC as these add impedance.

That expensive looking item is 6mm copper bar. Each peice cost about 12p. A fuse is more than that LOL.

Brent
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Old 15th December 2006, 11:41 AM   #5067
awpagan is offline awpagan  Australia
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Martin
No problem from me about using extra safety precautions at all!
Fuses or safety breakers? anything is better than nothing.
This was NOT a comment about safety standards or the best way to implement them.
Check with your local country's standards


allan
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Old 15th December 2006, 03:43 PM   #5068
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Ummmmm, fuses, this isnt the first time the removal of the fuse issue has been raised.

Personally, myself i wouldnt use anything other than a 13amp fuse.

There is a big risk of fire and/or electrocution under fault conditions. Most RCDs and MCBs are rated at 30 or 40ms before the unit will trip the supply. I am not totally versed on the individual manufacturers spec though. As mentioned it is possible to pass sufficient current to cause a heating effect of a cable or insulation. This heating effect may cause a fire hours after the initial fault has occured and been cleared. I have realtime examples of this that i have been involved in personaly. (work, not burning down my house lol)

The distribution fuse/device if rated at say 16 amps, on a 40ms trip device, would potentially pass a high fault current, i say potentially as this depends on so many factors including "luck" !
The higher the current available the greater the risk.

Most Consumer distribution panels are rated at 32amp and higher, the fuse offers an additional layer of protection to both equipment and user, the higher the current availability, and the less protection afforded must mean an increase in risk and potential harm ?

Brent, what do most other cable makers use ? I can see the limitations of the fuse, but wondering is there another alternative ? There are cartridge fuses available that may also offer a compromise ?

I am pretty certain that an electrical fire caused by a piece of equipment wich has had the fuse bypassed would invalidate insurance immediatly as mentioned. So there may be some liability risks there possibly that would need to be clarified or disclaimed against ?
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Old 15th December 2006, 03:59 PM   #5069
avr300 is offline avr300  Denmark
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Quote:
Originally posted by jksmurf
LOL, Yep, The Glaedilig Jul version. (Min mor kommer fra Esbjerg). Sooo.. may I ask..where did you put the OTHER two fleas (the non clock versions)?

k.
The very Santa version. Lets see if I remember. It's 2740 posts ago!

The one at left supplies the pins 17,22 and 26 of the DAC, the analog 5V. You can do this by removing the wirelink and inject your clean 5V like this.
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Old 15th December 2006, 04:00 PM   #5070
avr300 is offline avr300  Denmark
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The right one is feeding pin27 af the DAC, 5V clock supply. You can do this by removing RD01 and inject the 5V as shown.

The one in the middle is the clock.
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