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-   -   Preowned Units (https://www.audiobanter.co.uk/uk-rec-audio-general-audio/9072-preowned-units.html)

Sid Trehan August 19th 17 04:28 PM

Preowned Units
 
Good day,
I am a hifi dealer from India and am looking for Preowned dealers from South East Asia, UK and Europe for used 220v original sharp quick sale deals in brands like - Avm, Accuphase, Mcintosh and also Pmc. Only scratch less units max 8/10 please.

Thanks


Woody[_4_] August 19th 17 05:01 PM

Preowned Units
 

"Sid Trehan" wrote in message
...
Good day,
I am a hifi dealer from India and am looking for Preowned dealers
from South East Asia, UK and Europe for used 220v original sharp
quick sale deals in brands like - Avm, Accuphase, Mcintosh and also
Pmc. Only scratch less units max 8/10 please.

Thanks


If you are in India and looking for outlets in India, why are to
'advertising' in a UK newsgroup?





Brian Gaff August 19th 17 05:50 PM

Preowned Units
 
Nobody owns dealers do they?
Brian

--
----- -
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please!
"Sid Trehan" wrote in message
...
Good day,
I am a hifi dealer from India and am looking for Preowned dealers from
South East Asia, UK and Europe for used 220v original sharp quick sale
deals in brands like - Avm, Accuphase, Mcintosh and also Pmc. Only scratch
less units max 8/10 please.

Thanks




Brian Gaff August 19th 17 05:54 PM

Preowned Units
 
He probably hit the wrond button.

I was just trying to figure out what UK might mean if it did not mean UK,
and on the other hand if he is not looking to the UK why write in English? I
reckon he is here, looking for old stuff he can flog back in India.
Sadly, there is much good hi fi around but people are being conned into
buying AV and dodgy bluetooth speakers, sound bars and surround systems with
naff speakers. None of which sound in the slightest bit convincing.
Brian

--
----- -
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please!
"Huge" wrote in message
...
On 2017-08-19, Woody wrote:

"Sid Trehan" wrote in message
...
Good day,
I am a hifi dealer from India and am looking for Preowned dealers
from South East Asia, UK and Europe for used 220v original sharp
quick sale deals in brands like - Avm, Accuphase, Mcintosh and also
Pmc. Only scratch less units max 8/10 please.

Thanks


If you are in India and looking for outlets in India, why are to
'advertising' in a UK newsgroup?


Probably doesn't understand what "uk." means. Usenet is pretty mysterious
to most people these days.


--
I don't have an attitude problem. If you have a problem with my
attitude, that's your problem.




~misfit~[_2_] August 20th 17 02:02 AM

Preowned Units
 
Once upon a time on usenet Huge wrote:
On 2017-08-19, Woody wrote:

"Sid Trehan" wrote in message
...
Good day,
I am a hifi dealer from India and am looking for Preowned dealers
from South East Asia, UK and Europe for used 220v original sharp
quick sale deals in brands like - Avm, Accuphase, Mcintosh and also
Pmc. Only scratch less units max 8/10 please.

Thanks


If you are in India and looking for outlets in India, why are to
'advertising' in a UK newsgroup?


Probably doesn't understand what "uk." means. Usenet is pretty
mysterious to most people these days.


Obviously. You both seem to have missed the part where he says he's looking
to buy from markets which use ~220v gear including the UK.

You cast aspersions on *his* comprehension of English (or lack thereof)...
--
Shaun.

"Humans will have advanced a long, long way when religious belief has a cozy
little classification in the DSM*."
David Melville (in r.a.s.f1)
(*Diagnostic and Statistical Manual of Mental Disorders)



~misfit~[_2_] August 20th 17 02:12 AM

Preowned Units
 
Once upon a time on usenet Brian Gaff wrote:
He probably hit the wrond button.


Nope.

I was just trying to figure out what UK might mean if it did not mean
UK, and on the other hand if he is not looking to the UK why write in
English?


English is the most widespread langauge in India. It's a 'country' that
compromises a large number of ethinic groups who all have thier own
langauges but all of whom understand the langauge of the erstwhile colonial
overlords to a greater or lesser extent.

I reckon he is here, looking for old stuff he can flog back
in India.


Excellent deduction there - considering he said as much.

Sadly, there is much good hi fi around


.... and India has a relatively new strata of its population who now have
money to buy this gear but are without the sources at home - hence our
enterprising Indian friends post.

I'm just pondering if the tone of the replies to this post are down to
racism, arrogance or (more kindly) an aversion to commercial posts on
usenet.
--
Shaun.

"Humans will have advanced a long, long way when religious belief has a cozy
little classification in the DSM*."
David Melville (in r.a.s.f1)
(*Diagnostic and Statistical Manual of Mental Disorders)

but people are being conned
into buying AV and dodgy bluetooth speakers, sound bars and surround
systems with naff speakers. None of which sound in the slightest bit
convincing. Brian

On 2017-08-19, Woody wrote:

"Sid Trehan" wrote in message
...
Good day,
I am a hifi dealer from India and am looking for Preowned dealers
from South East Asia, UK and Europe for used 220v original sharp
quick sale deals in brands like - Avm, Accuphase, Mcintosh and also
Pmc. Only scratch less units max 8/10 please.

Thanks


If you are in India and looking for outlets in India, why are to
'advertising' in a UK newsgroup?


Probably doesn't understand what "uk." means. Usenet is pretty
mysterious to most people these days.


--
I don't have an attitude problem. If you have a problem with my
attitude, that's your problem.





~misfit~[_2_] August 20th 17 02:15 AM

Preowned Units
 
Once upon a time on usenet Brian Gaff wrote:
Nobody owns dealers do they?
Brian


I don't know - a lot of then seem to lack souls.

(Points deducted for being a grammar shamer.)
--
Shaun.

"Humans will have advanced a long, long way when religious belief has a cozy
little classification in the DSM*."
David Melville (in r.a.s.f1)
(*Diagnostic and Statistical Manual of Mental Disorders)

Good day,
I am a hifi dealer from India and am looking for Preowned dealers
from South East Asia, UK and Europe for used 220v original sharp
quick sale deals in brands like - Avm, Accuphase, Mcintosh and also
Pmc. Only scratch less units max 8/10 please.

Thanks





Phil Allison[_3_] August 20th 17 02:49 AM

Preowned Units
 
Sid Trehan wrote:

-------------------
Good day,
I am a hifi dealer from India and am looking for Preowned dealers
from South East Asia, UK and Europe for used 220v original sharp
quick sale deals in brands like - Avm, Accuphase, Mcintosh and also Pmc.
Only scratch less units max 8/10 please.



** If you cannot find such dealers using Google, it is likely becaue they don't exist. Ebay has taken over the trade in used equipment of all sorts.


..... Phil


Dave Plowman (News) August 20th 17 08:58 AM

Preowned Units
 
In article ,
~misfit~ wrote:
Once upon a time on usenet Huge wrote:
On 2017-08-19, Woody wrote:

"Sid Trehan" wrote in message
...
Good day,
I am a hifi dealer from India and am looking for Preowned dealers
from South East Asia, UK and Europe for used 220v original sharp
quick sale deals in brands like - Avm, Accuphase, Mcintosh and also
Pmc. Only scratch less units max 8/10 please.

Thanks


If you are in India and looking for outlets in India, why are to
'advertising' in a UK newsgroup?


Probably doesn't understand what "uk." means. Usenet is pretty
mysterious to most people these days.


Obviously. You both seem to have missed the part where he says he's
looking to buy from markets which use ~220v gear including the UK.


The UK is 240v. Older equipment designed for 220v will very likely go bang
on 240v. Unless the mains transformer has a 240v tapping.

But the equipment mentioned isn't exactly mainstream UK either.

So just why are you defending spam?

You cast aspersions on *his* comprehension of English (or lack thereof)...


--
*Rehab is for quitters.

Dave Plowman
London SW
To e-mail, change noise into sound.

Phil Allison[_3_] August 20th 17 09:40 AM

Preowned Units
 
Dave Plowman (Nutcase Moron) wrote:

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

Obviously. You both seem to have missed the part where he says he's
looking to buy from markets which use ~220v gear including the UK.


The UK is 240v. Older equipment designed for 220v will very likely go bang
on 240v. Unless the mains transformer has a 240v tapping.


** India is a 230VAC country, so is the UK and Australia, despite the supply being 240VAC at most locations.



..... Phil

Woody[_4_] August 20th 17 10:50 AM

Preowned Units
 

"Dave Plowman (News)" wrote in message
...
In article ,
~misfit~ wrote:
Once upon a time on usenet Huge wrote:
On 2017-08-19, Woody wrote:

"Sid Trehan" wrote in message
...
Good day,
I am a hifi dealer from India and am looking for Preowned
dealers
from South East Asia, UK and Europe for used 220v original
sharp
quick sale deals in brands like - Avm, Accuphase, Mcintosh and
also
Pmc. Only scratch less units max 8/10 please.

Thanks


If you are in India and looking for outlets in India, why are to
'advertising' in a UK newsgroup?

Probably doesn't understand what "uk." means. Usenet is pretty
mysterious to most people these days.


Obviously. You both seem to have missed the part where he says he's
looking to buy from markets which use ~220v gear including the UK.


The UK is 240v. Older equipment designed for 220v will very likely
go bang
on 240v. Unless the mains transformer has a 240v tapping.

[snip]

Unlikely. Yes the transformer and/or regulators might run a bit warmer
but it is very poor design if 10% over voltage causes something to
fail big time.


--
Woody

harrogate3 at ntlworld dot com



Dave Plowman (News) August 20th 17 11:31 AM

Preowned Units
 
In article ,
Phil Allison wrote:
Dave Plowman (Nutcase Moron) wrote:


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

Obviously. You both seem to have missed the part where he says he's
looking to buy from markets which use ~220v gear including the UK.


The UK is 240v. Older equipment designed for 220v will very likely go bang
on 240v. Unless the mains transformer has a 240v tapping.


** India is a 230VAC country, so is the UK and Australia, despite the supply being 240VAC at most locations.



230v here was an EU harmonisation. So that equipment made afterwards had
to be suitable for the spread across the EU. But the voltage didn't change
in the UK, even although the specification did. For many things it is OK -
but tungsten lamps have either their brightness and or life altered if not
run at the voltage they are designed for.

220v sounds very like a US etc standard.

--
*Remember: First you pillage, then you burn.

Dave Plowman London SW
To e-mail, change noise into sound.

Dave Plowman (News) August 20th 17 11:36 AM

Preowned Units
 
In article ,
Woody wrote:
The UK is 240v. Older equipment designed for 220v will very likely go
bang on 240v. Unless the mains transformer has a 240v tapping.

[snip]


Unlikely. Yes the transformer and/or regulators might run a bit warmer
but it is very poor design if 10% over voltage causes something to
fail big time.


I'd expect anything to cope with a short term over voltage. But long term
may well be very different. Up to you if you want to risk it.

I have a Quad 405 on the bench at the moment. That has settings for
220,230 and 240v. Why would they bother if it didn't matter?

--
*America is so advanced that even the chairs are electric.

Dave Plowman London SW
To e-mail, change noise into sound.

Woody[_4_] August 20th 17 01:24 PM

Preowned Units
 

"Dave Plowman (News)" wrote in message
...
In article ,
Woody wrote:
The UK is 240v. Older equipment designed for 220v will very
likely go
bang on 240v. Unless the mains transformer has a 240v tapping.

[snip]


Unlikely. Yes the transformer and/or regulators might run a bit
warmer
but it is very poor design if 10% over voltage causes something to
fail big time.


I'd expect anything to cope with a short term over voltage. But long
term
may well be very different. Up to you if you want to risk it.

I have a Quad 405 on the bench at the moment. That has settings for
220,230 and 240v. Why would they bother if it didn't matter?


1. Insufficient heat-sinking on power devices to reduce size and cost
2. Non-regulated power supply



--
Woody

harrogate3 at ntlworld dot com



Mike Fleming August 20th 17 03:54 PM

Preowned Units
 
In article , "Dave Plowman (News)"
writes:

220v sounds very like a US etc standard.


Doesn't sound much like a US standard as their mains voltage is around
half that.

--
Mike Fleming

Dave Plowman (News) August 20th 17 05:36 PM

Preowned Units
 
In article ,
Woody wrote:
I have a Quad 405 on the bench at the moment. That has settings for
220,230 and 240v. Why would they bother if it didn't matter?


1. Insufficient heat-sinking on power devices to reduce size and cost
2. Non-regulated power supply


Most do tend to keep size to a minimum.
Do many power amps use a regulated supply?

--
*A plateau is a high form of flattery*

Dave Plowman London SW
To e-mail, change noise into sound.

Dave Plowman (News) August 20th 17 05:37 PM

Preowned Units
 
In article ,
Mike Fleming wrote:
In article , "Dave Plowman (News)"
writes:


220v sounds very like a US etc standard.


Doesn't sound much like a US standard as their mains voltage is around
half that.


They tend to have a higher voltage for things like electric cookers and
heating, etc.

--
*Marriage changes passion - suddenly you're in bed with a relative*

Dave Plowman London SW
To e-mail, change noise into sound.

Vir Campestris August 20th 17 08:16 PM

Preowned Units
 
On 20/08/2017 18:37, Dave Plowman (News) wrote:
In article ,
Mike Fleming wrote:
In article , "Dave Plowman (News)"
writes:


220v sounds very like a US etc standard.


Doesn't sound much like a US standard as their mains voltage is around
half that.


They tend to have a higher voltage for things like electric cookers and
heating, etc.

Not for a hifi component though.

Andy

Mike Fleming August 20th 17 08:51 PM

Preowned Units
 
In article , "Dave Plowman (News)"
writes:

In article ,
Mike Fleming wrote:
In article , "Dave Plowman (News)"
writes:


220v sounds very like a US etc standard.


Doesn't sound much like a US standard as their mains voltage is around
half that.


They tend to have a higher voltage for things like electric cookers and
heating, etc.


Hi-fi units would generally be run off common or garden mains rather
than the higher voltage (which IIRC is done by using opposite phases,
so it's actually two 120V supplies in antiphase with a neutral which
is ignored to get 240V).

--
Mike Fleming

Phil Allison[_3_] August 21st 17 12:34 AM

Preowned Units
 
Dave Plowman (Nutcase Moron) wrote:

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


Obviously. You both seem to have missed the part where he says he's
looking to buy from markets which use ~220v gear including the UK.

The UK is 240v. Older equipment designed for 220v will very likely go bang
on 240v. Unless the mains transformer has a 240v tapping.


** India is a 230VAC country, so is the UK and Australia, despite the supply being 240VAC at most locations.



230v here was an EU harmonisation. So that equipment made afterwards had
to be suitable for the spread across the EU.


** Australia made the same adoption, but noting changed but the tolerance band on the AC supply.

But the voltage didn't change
in the UK, even although the specification did.


220v sounds very like a US etc standard.


** The USA is nominal 120VAC with two phase ( ie antiphase) power being 240VAC.

India is not 220V and the OP has no issue with any audio gear sold in the UK.


..... Phil

Phil Allison[_3_] August 21st 17 12:38 AM

Preowned Units
 
Dave Plowman (Nutcase Moron) wrote:

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



I'd expect anything to cope with a short term over voltage. But long term
may well be very different. Up to you if you want to risk it.

I have a Quad 405 on the bench at the moment. That has settings for
220,230 and 240v. Why would they bother if it didn't matter?


** Only matters so owners can get rated power output figure.

Very few other makers bother with such small corrections.


..... Phil

Woody[_4_] August 21st 17 07:45 AM

Preowned Units
 

"Mike Fleming" wrote in message
...
In article , "Dave Plowman (News)"
writes:

In article ,
Mike Fleming wrote:
In article , "Dave Plowman
(News)"
writes:


220v sounds very like a US etc standard.


Doesn't sound much like a US standard as their mains voltage is
around
half that.


They tend to have a higher voltage for things like electric cookers
and
heating, etc.


Hi-fi units would generally be run off common or garden mains rather
than the higher voltage (which IIRC is done by using opposite
phases,
so it's actually two 120V supplies in antiphase with a neutral which
is ignored to get 240V).


Well nearly. There is no such thing as antiphase on a three-phase
supply. You get (in the US) 120V between any single phase and earth
(which is connected to the star point) and 120(3e0.5) or about 208V
between phases - just as we have 240V single phase or 415V across two
phases in the UK, or 220V and 380V respectively in Europe.


--
Woody

harrogate3 at ntlworld dot com




Phil Allison[_3_] August 21st 17 08:24 AM

Preowned Units
 
Woody wrote:



220v sounds very like a US etc standard.

Doesn't sound much like a US standard as their mains voltage is
around half that.

They tend to have a higher voltage for things like electric cookers
and heating, etc.


Hi-fi units would generally be run off common or garden mains rather
than the higher voltage (which IIRC is done by using opposite
phases,
so it's actually two 120V supplies in antiphase with a neutral which
is ignored to get 240V).


Well nearly.



** Exactly, really.

There is no such thing as antiphase on a three-phase
supply.



** But it is not, most premises in the USA have "2 phase" power.

240VAC is split by a transformer into a pair of 120VAC supplies with a common centre tap - usually grounded.

Ordinary appliances use the US flat pin 120V plugs while high current and permanently wired ones connect across the phases.




..... Phil





Dave Plowman (News) August 21st 17 10:14 AM

Preowned Units
 
In article ,
Phil Allison wrote:
Dave Plowman (Nutcase Moron) wrote:


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




I'd expect anything to cope with a short term over voltage. But long term
may well be very different. Up to you if you want to risk it.

I have a Quad 405 on the bench at the moment. That has settings for
220,230 and 240v. Why would they bother if it didn't matter?


** Only matters so owners can get rated power output figure.


Very few other makers bother with such small corrections.



I remember seeing Quad 405s used with BBC monitor speakers with a label
added to all of them (Do not set to 230v - leave on 240) or somesuch,
after the 230v harmonisation. Presumably for a good reason. ;-)

--
*The hardness of the butter is proportional to the softness of the bread *

Dave Plowman London SW
To e-mail, change noise into sound.

Dave Plowman (News) August 21st 17 10:18 AM

Preowned Units
 
In article ,
Phil Allison wrote:
** But it is not, most premises in the USA have "2 phase" power.


240VAC is split by a transformer into a pair of 120VAC supplies with a
common centre tap - usually grounded.


Ordinary appliances use the US flat pin 120V plugs while high current
and permanently wired ones connect across the phases.


That isn't what's normally meant by phases.

If you go across two phases in the UK, you don't get double the single
phase voltage.

--
*Verbs HAS to agree with their subjects *

Dave Plowman London SW
To e-mail, change noise into sound.

Andy Burns[_6_] August 21st 17 10:39 AM

Preowned Units
 
Dave Plowman wrote:

If you go across two phases in the UK, you don't get double the single
phase voltage.


Because our phases are 120° apart (all the way from generator to
premises that have 3-ph) but the way the USA phases are delivered
they're 180° apart (at least from the pole pig to the premises as 2-ph,
presumably they have 3-ph from generator to the street, with
transformers in general spread between the phases?)

John J Armstrong August 21st 17 12:38 PM

Preowned Units
 
On Mon, 21 Aug 2017 11:14:29 +0100, "Dave Plowman (News)"
wrote:

In article ,
Phil Allison wrote:
Dave Plowman (Nutcase Moron) wrote:


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




I'd expect anything to cope with a short term over voltage. But long term
may well be very different. Up to you if you want to risk it.

I have a Quad 405 on the bench at the moment. That has settings for
220,230 and 240v. Why would they bother if it didn't matter?


** Only matters so owners can get rated power output figure.


Very few other makers bother with such small corrections.



I remember seeing Quad 405s used with BBC monitor speakers with a label
added to all of them (Do not set to 230v - leave on 240) or somesuch,
after the 230v harmonisation. Presumably for a good reason. ;-)


I believe, and I'm sure someone will correct me if I'm wrong, the UK
spec is 230 V +10% -6%, so 253 V to 216 V.

Any time I've had occasion to measure it at home (Dundee) it's been
pushing the upper limit. A few minutes ago it was 248 V.

Johan Helsingius August 21st 17 02:18 PM

Preowned Units
 
On 21-08-17 14:38, John J Armstrong wrote:

I believe, and I'm sure someone will correct me if I'm wrong, the UK
spec is 230 V +10% -6%, so 253 V to 216 V.


Yes - it was a typical political compromise. UK is 230V +10%/-6%
(or 240V +6%/-10%) and Continental Europe 230V +6%/-10% (or 220V
+10%/-6%), so they get away saying both are nominally 230V...

Julf


Don Pearce[_3_] August 21st 17 03:09 PM

Preowned Units
 
On Mon, 21 Aug 2017 11:39:45 +0100, Andy Burns
wrote:

Dave Plowman wrote:

If you go across two phases in the UK, you don't get double the single
phase voltage.


Because our phases are 120° apart (all the way from generator to
premises that have 3-ph) but the way the USA phases are delivered
they're 180° apart (at least from the pole pig to the premises as 2-ph,
presumably they have 3-ph from generator to the street, with
transformers in general spread between the phases?)


Three phase makes good sense. Local supply must be three phases plus a
neutral return, with as far as possible equal load on all phases. This
arrangement is called a star.

But trunk transmission doesn't require a neutral. The arrangement is
called delta and the neutral for each phase is a virtual one
comprising the vector sum of the other two phases. That's a big metal
saving, because a physical neutral would have to be three times the
area of a phase.

d

---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus


Jim Lesurf[_2_] August 21st 17 04:36 PM

Preowned Units
 
In article , Don Pearce
wrote:
On Mon, 21 Aug 2017 11:39:45 +0100, Andy Burns
wrote:


Dave Plowman wrote:

If you go across two phases in the UK, you don't get double the
single phase voltage.


Because our phases are 120° apart (all the way from generator to
premises that have 3-ph) but the way the USA phases are delivered
they're 180° apart (at least from the pole pig to the premises as
2-ph, presumably they have 3-ph from generator to the street, with
transformers in general spread between the phases?)


Three phase makes good sense. Local supply must be three phases plus a
neutral return, with as far as possible equal load on all phases. This
arrangement is called a star.


However my understanding of the USA is as Andy says. The power gets to the
street level as 220v. It is then split into two 110v supplies using a
center-tapped transformer. Each house may get a 220v and one of the 110v
volt feeds. I guess this is for some 'historic' reason. Having spent some
time in small Kansas town one of my old photos may show one of the
transformers on a pole that does this. Not looked, but I have to trawl them
for a webpage tomorrow so I may see if I can find an example.

Jim

--
Please use the address on the audiomisc page if you wish to email me.
Electronics https://www.st-andrews.ac.uk/~www_pa...o/electron.htm
Armstrong Audio http://www.audiomisc.co.uk/Armstrong/armstrong.html
Audio Misc http://www.audiomisc.co.uk/index.html


Phil Allison[_3_] August 22nd 17 03:13 AM

Preowned Units
 
Dave Plowman ****ing Nutcase wrote:

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

** Where has the context gone ???

Dave snipped it all so he could invent a new one.



** But it is not, most premises in the USA have "2 phase" power.


240VAC is split by a transformer into a pair of 120VAC supplies with a
common centre tap - usually grounded.


Ordinary appliances use the US flat pin 120V plugs while high current
and permanently wired ones connect across the phases.


That isn't what's normally meant by phases.


** Dave missed the parentheses I use around the term.


If you go across two phases in the UK, you don't get double the single
phase voltage.


** So ****ing what?



...... Phil

Phil Allison[_3_] August 22nd 17 03:15 AM

Preowned Units
 
Andy Burns wrote:

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


If you go across two phases in the UK, you don't get double the single
phase voltage.


Because our phases are 120° apart (all the way from generator to
premises that have 3-ph) but the way the USA phases are delivered
they're 180° apart (at least from the pole pig to the premises as 2-ph,
presumably they have 3-ph from generator to the street, with
transformers in general spread between the phases?)


** Distribution is via 3-phase, like anywhere else.


...... Phil

Phil Allison[_3_] August 22nd 17 03:27 AM

Preowned Units
 

Don Pearce wrote:

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


But trunk transmission doesn't require a neutral. The arrangement is
called delta and the neutral for each phase is a virtual one
comprising the vector sum of the other two phases. That's a big metal
saving, because a physical neutral would have to be three times the
area of a phase.


** In a 3-phase plus neutral supply, the max neutral current possible is when only one phase is loaded. Adding in a second phase reduces the neutral current and loading all three equally reduces it to zero.

The one exception to this is if all the loads use rectifier and capacitor PSUs without PFC. Then it is possible for all the current pulses to combine in the neutral without overlap - producing 3 times the heating effect of one phase current.

The above could never arise in a 3-phase trunk supply.


..... Phil



Dave Plowman (News) August 22nd 17 10:37 AM

Preowned Units
 
In article ,
Phil Allison wrote:
Dave Plowman ****ing Nutcase wrote:


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


** Where has the context gone ???


Dave snipped it all so he could invent a new one.




** But it is not, most premises in the USA have "2 phase" power.


240VAC is split by a transformer into a pair of 120VAC supplies with a
common centre tap - usually grounded.


Ordinary appliances use the US flat pin 120V plugs while high current
and permanently wired ones connect across the phases.


That isn't what's normally meant by phases.


** Dave missed the parentheses I use around the term.


Parenthesis doesn't excuse using the wrong term - especially from a pedant
like you.

If you go across two phases in the UK, you don't get double the single
phase voltage.


** So ****ing what?


A reason to use the correct term?



..... Phil


--
*I love cats...they taste just like chicken.

Dave Plowman London SW
To e-mail, change noise into sound.

Dave Plowman (News) August 22nd 17 10:37 AM

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In article ,
Huge wrote:
On 2017-08-21, Jim Lesurf wrote:


[19 lines snipped]


However my understanding of the USA is as Andy says. The power gets to
the street level as 220v. It is then split into two 110v supplies
using a center-tapped transformer. Each house may get a 220v and one
of the 110v volt feeds.


Correct. (My parents have lived in the USA for 35 years and in recent
years I have worked on their house. Wire nuts are very scary.)


I guess this is for some 'historic' reason.


Large domestic appliances draw too much current on 110V supplies.
Combined with aluminium ("aluminum") wiring, wooden houses, volunteer
fire brigades and long distances, this is an incendiary combination.
Can't imagine that wire nuts help.


So what are the nominal voltages - given everyone seems to say different?

If a transformer, 110 and 220v?

--
*White with a hint of M42*

Dave Plowman London SW
To e-mail, change noise into sound.

Don Pearce[_3_] August 22nd 17 12:14 PM

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On Tue, 22 Aug 2017 11:37:50 +0100, "Dave Plowman (News)"
wrote:

In article ,
Huge wrote:
On 2017-08-21, Jim Lesurf wrote:


[19 lines snipped]


However my understanding of the USA is as Andy says. The power gets to
the street level as 220v. It is then split into two 110v supplies
using a center-tapped transformer. Each house may get a 220v and one
of the 110v volt feeds.


Correct. (My parents have lived in the USA for 35 years and in recent
years I have worked on their house. Wire nuts are very scary.)


I guess this is for some 'historic' reason.


Large domestic appliances draw too much current on 110V supplies.
Combined with aluminium ("aluminum") wiring, wooden houses, volunteer
fire brigades and long distances, this is an incendiary combination.
Can't imagine that wire nuts help.


So what are the nominal voltages - given everyone seems to say different?

If a transformer, 110 and 220v?


120/240 I believe is the nominal. But the geography of the country
means that many rural people are on the end of long lines. I'm sure
they use transformers with adjustable taps to get the voltage as close
as possible, but I reckon it's a bit of a lottery as to what you
actually get.

d

---
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Johan Helsingius August 22nd 17 12:50 PM

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On 22-08-17 12:37, Dave Plowman (News) wrote:

So what are the nominal voltages - given everyone seems to say different?


Maybe Wikipedia is clear enough:

"Following voltage harmonisation, electricity supplies within the
European Union are now nominally 230 V ±10% at 50 Hz.[6] For a
transition period (1995–2008), countries that had previously used
220 V changed to a narrower asymmetric tolerance range of 230 V
+6%/−10% and those (like the UK) that had previously used 240 V
changed to 230 V +10%/−6%. No change in voltage is required by
either system as both 220 V and 240 V fall within the lower 230 V
tolerance bands (230 V ±10%). Some areas of the UK still have 250
volts for legacy reasons, but these also fall within the 10%
tolerance band of 230 volts. In practice, this allows countries
to continue to supply the same voltage (220 or 240 V), at least
until existing supply transformers are replaced. Equipment (with
the exception of filament bulbs) used in these countries is
designed to accept any voltage within the specified range. In the
United States and Canada, national standards specify that the
nominal voltage at the source should be 120 V and allow a range
of 114 V to 126 V (RMS) (−5% to +5%). Historically 110 V, 115 V
and 117 V have been used at different times and places in North
America. Mains power is sometimes spoken of as 110 V; however,
120 V is the nominal voltage."


Jim Lesurf[_2_] August 22nd 17 12:55 PM

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In article , Dave Plowman (News)
wrote:

So what are the nominal voltages - given everyone seems to say different?


If a transformer, 110 and 220v?


My recollection is that it was 110 and 220 where I visited. But it was
decades ago so my memory may well be faulty. Wasn't the purpose of my
trip(s) to the USA! 8-]

Jim

--
Please use the address on the audiomisc page if you wish to email me.
Electronics https://www.st-andrews.ac.uk/~www_pa...o/electron.htm
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Audio Misc http://www.audiomisc.co.uk/index.html


Jim Lesurf[_2_] August 22nd 17 03:55 PM

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In article , Johan Helsingius
wrote:
On 22-08-17 12:37, Dave Plowman (News) wrote:


So what are the nominal voltages - given everyone seems to say
different?


Maybe Wikipedia is clear enough:


"...
the nominal voltage at the source should be 120 V and allow a range of
114 V to 126 V (RMS) (-5% to +5%). Historically 110 V, 115 V and 117 V
have been used at different times and places in North America. Mains
power is sometimes spoken of as 110 V; however, 120 V is the nominal
voltage."


Maybe it is. However, clear or not, I've more than once found errors in
Wikipedia, so I'd regard it as a guide to what is probably correct rather
than a reference.

Jim

--
Please use the address on the audiomisc page if you wish to email me.
Electronics https://www.st-andrews.ac.uk/~www_pa...o/electron.htm
Armstrong Audio http://www.audiomisc.co.uk/Armstrong/armstrong.html
Audio Misc http://www.audiomisc.co.uk/index.html


Phil Allison[_3_] August 22nd 17 11:41 PM

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Dave Plowman ****ing Nutcase wrote:

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

** Where has the context gone ???


Dave snipped it all so he could invent a new one.




** But it is not, most premises in the USA have "2 phase" power.

240VAC is split by a transformer into a pair of 120VAC supplies with a
common centre tap - usually grounded.

Ordinary appliances use the US flat pin 120V plugs while high current
and permanently wired ones connect across the phases.

That isn't what's normally meant by phases.


** Dave missed the parentheses I use around the term.


Parenthesis doesn't excuse using the wrong term


** My usage of the term was 100% correct - you ****ing moron.




..... Phil



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