EDAboard.com | EDAboard.de | EDAboard.co.uk | WTWH Media

Gotta protect the integrity of that power

Ask a question - edaboard.com

elektroda.net NewsGroups Forum Index - Electronics AUS - Gotta protect the integrity of that power

FMurtz
Guest

Tue Dec 26, 2017 10:13 am   



http://www.hifichoice.co.uk/news/article/isotek-competition/25866/

Sylvia Else
Guest

Tue Dec 26, 2017 12:48 pm   



On 26/12/2017 7:13 PM, FMurtz wrote:
> http://www.hifichoice.co.uk/news/article/isotek-competition/25866/

Most of it is gibberish, of course, but this statement

"Suddenly, the noise floor drops"

looks like it's saying something that could be tested (and surely isn't
true).

Someone's slipped up.

Sylvia.


Guest

Tue Dec 26, 2017 9:48 pm   



On Tue, 26 Dec 2017 21:48:00 +1100, Sylvia Else
<sylvia_at_not.at.this.address> wrote:

Quote:
On 26/12/2017 7:13 PM, FMurtz wrote:
http://www.hifichoice.co.uk/news/article/isotek-competition/25866/

Most of it is gibberish, of course, but this statement

"Suddenly, the noise floor drops"

looks like it's saying something that could be tested (and surely isn't
true).

Someone's slipped up.


Too bad what happens at the powerpoint (and beyond that) as well.

Trevor Wilson
Guest

Thu Dec 28, 2017 7:25 am   



On 27/12/2017 6:48 AM, Je�us wrote:
Quote:
On Tue, 26 Dec 2017 21:48:00 +1100, Sylvia Else
sylvia_at_not.at.this.address> wrote:

On 26/12/2017 7:13 PM, FMurtz wrote:
http://www.hifichoice.co.uk/news/article/isotek-competition/25866/

Most of it is gibberish, of course, but this statement

"Suddenly, the noise floor drops"

looks like it's saying something that could be tested (and surely isn't
true).

Someone's slipped up.

Too bad what happens at the powerpoint (and beyond that) as well.


**It doesn't matter. In every piece of audio equipment, there are
transformers, rectifiers and capacitors. Low level equipment employs
high speed regulators. Each reduces the influence of any mains bourne
interference to utter insignificance. All those power line filters and
the like are bogus. Most electrical noise is radiated into the
equipment, low level cables, or speaker cables. Nothing (unless it is a
biblically huge and prolonged transient, can make it through the power
supply.

--
Trevor Wilson
www.rageaudio.com.au

Phil Allison
Guest

Thu Dec 28, 2017 8:11 am   



Trevor Wilson wrote:

---------------------
Quote:

Someone's slipped up.

Too bad what happens at the powerpoint (and beyond that) as well.


**It doesn't matter. In every piece of audio equipment, there are
transformers, rectifiers and capacitors. Low level equipment employs
high speed regulators. Each reduces the influence of any mains bourne
interference to utter insignificance. All those power line filters and
the like are bogus. Most electrical noise is radiated into the
equipment, low level cables, or speaker cables. Nothing (unless it is a
biblically huge and prolonged transient, can make it through the power
supply.



** All true enough, unless the hi-fi system contains a ground loop.

Consumer audio operates in "unbalanced" mode so is very susceptible to ground ( aka hum ) loops - essentially when safety ground conductors duplicate the job signal grounds between two or more items.

If you have your home PC linked to you hi-fi you are likely familiar with how non silent the result can be.

My home PC operates independently, but I have a flat screen TV linked to the pre-amp. The SMPS in the TV is a source of low level noise as is the communal antenna system that provides the only usable signal.



..... Phil

Trevor Wilson
Guest

Thu Dec 28, 2017 9:07 pm   



On 28/12/2017 5:11 PM, Phil Allison wrote:
Quote:
Trevor Wilson wrote:

---------------------

Someone's slipped up.

Too bad what happens at the powerpoint (and beyond that) as well.


**It doesn't matter. In every piece of audio equipment, there are
transformers, rectifiers and capacitors. Low level equipment employs
high speed regulators. Each reduces the influence of any mains bourne
interference to utter insignificance. All those power line filters and
the like are bogus. Most electrical noise is radiated into the
equipment, low level cables, or speaker cables. Nothing (unless it is a
biblically huge and prolonged transient, can make it through the power
supply.



** All true enough, unless the hi-fi system contains a ground loop.

Consumer audio operates in "unbalanced" mode so is very susceptible to ground ( aka hum ) loops - essentially when safety ground conductors duplicate the job signal grounds between two or more items.

If you have your home PC linked to you hi-fi you are likely familiar with how non silent the result can be.

My home PC operates independently, but I have a flat screen TV linked to the pre-amp. The SMPS in the TV is a source of low level noise as is the communal antenna system that provides the only usable signal.


**Communal antennae can be a real PITA. You are connected to every other
problem in the building. Worst, is often the antenna amplifier, which
usually obtains it's power via the coax. It's a cheap, crappy system and
very common.

Either way, one of those stupid filter power boards will do fuck all to
fix anything. All they are are is one of the few remaining profit
centres for electrical goods shops. That and their insanely over-priced
HDMI leads.


--
Trevor Wilson
www.rageaudio.com.au

keithr0
Guest

Tue Jan 02, 2018 1:39 am   



On 12/27/2017 5:48 AM, Je�us wrote:
Quote:
On Tue, 26 Dec 2017 21:48:00 +1100, Sylvia Else
sylvia_at_not.at.this.address> wrote:

On 26/12/2017 7:13 PM, FMurtz wrote:
http://www.hifichoice.co.uk/news/article/isotek-competition/25866/

Most of it is gibberish, of course, but this statement

"Suddenly, the noise floor drops"

looks like it's saying something that could be tested (and surely isn't
true).

Someone's slipped up.

Too bad what happens at the powerpoint (and beyond that) as well.

If mains born noise really is a problem, the best solution is an
isolation transformer, one with as much iron as possible.

Trevor Wilson
Guest

Tue Jan 02, 2018 2:42 am   



On 2/01/2018 10:39 AM, keithr0 wrote:
Quote:
On 12/27/2017 5:48 AM, Je�us wrote:
On Tue, 26 Dec 2017 21:48:00 +1100, Sylvia Else
sylvia_at_not.at.this.address> wrote:

On 26/12/2017 7:13 PM, FMurtz wrote:
http://www.hifichoice.co.uk/news/article/isotek-competition/25866/

Most of it is gibberish, of course, but this statement

"Suddenly, the noise floor drops"

looks like it's saying something that could be tested (and surely isn't
true).

Someone's slipped up.

Too bad what happens at the powerpoint (and beyond that) as well.

If mains born noise really is a problem, the best solution is an
isolation transformer, one with as much iron as possible.


**It won't be. It almost never is.

--
Trevor Wilson
www.rageaudio.com.au

keithr0
Guest

Fri Jan 05, 2018 5:16 am   



On 1/2/2018 10:42 AM, Trevor Wilson wrote:
Quote:
On 2/01/2018 10:39 AM, keithr0 wrote:
On 12/27/2017 5:48 AM, Je�us wrote:
On Tue, 26 Dec 2017 21:48:00 +1100, Sylvia Else
sylvia_at_not.at.this.address> wrote:

On 26/12/2017 7:13 PM, FMurtz wrote:
http://www.hifichoice.co.uk/news/article/isotek-competition/25866/

Most of it is gibberish, of course, but this statement

"Suddenly, the noise floor drops"

looks like it's saying something that could be tested (and surely isn't
true).

Someone's slipped up.

Too bad what happens at the powerpoint (and beyond that) as well.

If mains born noise really is a problem, the best solution is an
isolation transformer, one with as much iron as possible.

**It won't be. It almost never is.

Yearh well, installations that I have done have probably been in a
somewhat different universe to yours.

elektroda.net NewsGroups Forum Index - Electronics AUS - Gotta protect the integrity of that power

Ask a question - edaboard.com

Arabic version Bulgarian version Catalan version Czech version Danish version German version Greek version English version Spanish version Finnish version French version Hindi version Croatian version Indonesian version Italian version Hebrew version Japanese version Korean version Lithuanian version Latvian version Dutch version Norwegian version Polish version Portuguese version Romanian version Russian version Slovak version Slovenian version Serbian version Swedish version Tagalog version Ukrainian version Vietnamese version Chinese version Turkish version
EDAboard.com map