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From: Phil Allison on 2 Jun 2010 21:14
"PeterDope"
>
> "Phil Allison"
>>
>> Export models were typically setup for 100/120/240 volts (Japan, USA
>> & and other countries with an approximate 120 volt standard, and other
>> countries with an approximate 240 volt standard.)
>>
>
>>** Japan does not have domestic 120 volt AC power.
>>
>>The standard domestic voltage is 100 volts and may be as low as 90 volts
>>in
>>some places.
>>
>>The AC frequency varies too, 50Hz and 60 Hz being used in differing parts
>>of
>>the country - means that most Japanese made products for domestic use
>>are designed to accept either frequency.
>>
>
> Geeze Phil, read...


** What I read was misleading and * needed correction*.

It is a very common myth that Japan has 120 volt AC, 60Hz power ( like the
USA) when it does NOT !!

Your post repeated that myth.

Cos of eBay, second hand Japanese local market electronics is now being sold
to folk in all parts of the world to use - most of whom mistakenly think
that it can be used on 120 volts AC or with a 240 to 120 volts step down
tranny.



..... Phil


From: N_Cook on 3 Jun 2010 03:27
Cydrome Leader <presence(a)MUNGEpanix.com> wrote in message
news:hu6geg$qkj$1(a)reader1.panix.com...
> N_Cook <diverse(a)tcp.co.uk> wrote:
> > About year 1999, USA make, for export
> > In line , not 2 or more separate primary windings, DC ohms to nearest
0.1
> > ohm. I'm assuming same gauge wire throughout
> > Labelled by me as A,B,C,D,E crossplot (message souce maybe equispaced
font)
> >
> > --- A B C D E
> > A --- 9.2 8.5 12.5 1.5
> > B 9.2 --- 0.6 3.6 7.6
> > C 8.5 0.6 --- 4.2 7.6
> > D 12.5 3.6 4.2 --- 11.1
> > E 1.5 7.6 7.6 11.1 ---
> >
> >
> > Would D-E / D-A be 220/240Vac or 230/250V ac?
> > what would likely be the 110 or 130V interconnctions option ?
> > Other than checking using a variac , any other tips ?
>
> you never mentioned what you're even talking about, or what it's from.
>
> Assuming it's something like an "international" linear power supply, there
would be
> windings for 100, 120 220 and 240 volts based off a combination of
terminals. US made
> transformers for domestic only use would generally max out at 3 or 4
terminals for
> 120/240 use.
>
> here's a diagram of how these international transformers work:
>
>
http://www.slpower.com/Upload/Technical/20070404102642455201154_41-32512F_ML
_Series.pdf


That transformer type is the 2 separate primaries, not the subject of this
thread.
Does anyone have the generic name for these wasteful construction made in or
for USA , for export kit ? the ones with a (electrically) continuous single
primary winding


From: Grant on 3 Jun 2010 03:50
On Thu, 3 Jun 2010 08:27:03 +0100, "N_Cook" <diverse(a)tcp.co.uk> wrote:

>Cydrome Leader <presence(a)MUNGEpanix.com> wrote in message
>news:hu6geg$qkj$1(a)reader1.panix.com...
>> N_Cook <diverse(a)tcp.co.uk> wrote:
>> > About year 1999, USA make, for export
>> > In line , not 2 or more separate primary windings, DC ohms to nearest
>0.1
>> > ohm. I'm assuming same gauge wire throughout
>> > Labelled by me as A,B,C,D,E crossplot (message souce maybe equispaced
>font)
>> >
>> > --- A B C D E
>> > A --- 9.2 8.5 12.5 1.5
>> > B 9.2 --- 0.6 3.6 7.6
>> > C 8.5 0.6 --- 4.2 7.6
>> > D 12.5 3.6 4.2 --- 11.1
>> > E 1.5 7.6 7.6 11.1 ---
>> >
>> >
>> > Would D-E / D-A be 220/240Vac or 230/250V ac?
>> > what would likely be the 110 or 130V interconnctions option ?
>> > Other than checking using a variac , any other tips ?
>>
>> you never mentioned what you're even talking about, or what it's from.
>>
>> Assuming it's something like an "international" linear power supply, there
>would be
>> windings for 100, 120 220 and 240 volts based off a combination of
>terminals. US made
>> transformers for domestic only use would generally max out at 3 or 4
>terminals for
>> 120/240 use.
>>
>> here's a diagram of how these international transformers work:
>>
>>
>http://www.slpower.com/Upload/Technical/20070404102642455201154_41-32512F_ML
>_Series.pdf
>
>
>That transformer type is the 2 separate primaries, not the subject of this
>thread.
>Does anyone have the generic name for these wasteful construction made in or
>for USA , for export kit ? the ones with a (electrically) continuous single
>primary winding
>
Autotransformer.

What results from driving the secondary with a low voltage?

Grant.
--
http://bugs.id.au/
From: N_Cook on 3 Jun 2010 04:12
Grant <omg(a)grrr.id.au> wrote in message
news:tkne06ltbli2a5aij6qc112iti0ed8tntp(a)4ax.com...
> On Thu, 3 Jun 2010 08:27:03 +0100, "N_Cook" <diverse(a)tcp.co.uk> wrote:
>
> >Cydrome Leader <presence(a)MUNGEpanix.com> wrote in message
> >news:hu6geg$qkj$1(a)reader1.panix.com...
> >> N_Cook <diverse(a)tcp.co.uk> wrote:
> >> > About year 1999, USA make, for export
> >> > In line , not 2 or more separate primary windings, DC ohms to nearest
> >0.1
> >> > ohm. I'm assuming same gauge wire throughout
> >> > Labelled by me as A,B,C,D,E crossplot (message souce maybe equispaced
> >font)
> >> >
> >> > --- A B C D E
> >> > A --- 9.2 8.5 12.5 1.5
> >> > B 9.2 --- 0.6 3.6 7.6
> >> > C 8.5 0.6 --- 4.2 7.6
> >> > D 12.5 3.6 4.2 --- 11.1
> >> > E 1.5 7.6 7.6 11.1 ---
> >> >
> >> >
> >> > Would D-E / D-A be 220/240Vac or 230/250V ac?
> >> > what would likely be the 110 or 130V interconnctions option ?
> >> > Other than checking using a variac , any other tips ?
> >>
> >> you never mentioned what you're even talking about, or what it's from.
> >>
> >> Assuming it's something like an "international" linear power supply,
there
> >would be
> >> windings for 100, 120 220 and 240 volts based off a combination of
> >terminals. US made
> >> transformers for domestic only use would generally max out at 3 or 4
> >terminals for
> >> 120/240 use.
> >>
> >> here's a diagram of how these international transformers work:
> >>
> >>
>
>http://www.slpower.com/Upload/Technical/20070404102642455201154_41-32512F_M
L
> >_Series.pdf
> >
> >
> >That transformer type is the 2 separate primaries, not the subject of
this
> >thread.
> >Does anyone have the generic name for these wasteful construction made in
or
> >for USA , for export kit ? the ones with a (electrically) continuous
single
> >primary winding
> >
> Autotransformer.
>
> What results from driving the secondary with a low voltage?
>
> Grant.
> --
> http://bugs.id.au/


My understanding of the term autotransformer is primary and secondary
electrically continuous, ie no electrical isolation


From: Ron on 3 Jun 2010 05:19
On 03/06/2010 08:27, N_Cook wrote:
> Cydrome Leader<presence(a)MUNGEpanix.com> wrote in message
> news:hu6geg$qkj$1(a)reader1.panix.com...
>> N_Cook<diverse(a)tcp.co.uk> wrote:
>>> About year 1999, USA make, for export
>>> In line , not 2 or more separate primary windings, DC ohms to nearest
> 0.1
>>> ohm. I'm assuming same gauge wire throughout
>>> Labelled by me as A,B,C,D,E crossplot (message souce maybe equispaced
> font)
>>>
>>> --- A B C D E
>>> A --- 9.2 8.5 12.5 1.5
>>> B 9.2 --- 0.6 3.6 7.6
>>> C 8.5 0.6 --- 4.2 7.6
>>> D 12.5 3.6 4.2 --- 11.1
>>> E 1.5 7.6 7.6 11.1 ---
>>>
>>>
>>> Would D-E / D-A be 220/240Vac or 230/250V ac?
>>> what would likely be the 110 or 130V interconnctions option ?
>>> Other than checking using a variac , any other tips ?
>>
>> you never mentioned what you're even talking about, or what it's from.
>>
>> Assuming it's something like an "international" linear power supply, there
> would be
>> windings for 100, 120 220 and 240 volts based off a combination of
> terminals. US made
>> transformers for domestic only use would generally max out at 3 or 4
> terminals for
>> 120/240 use.
>>
>> here's a diagram of how these international transformers work:
>>
>>
> http://www.slpower.com/Upload/Technical/20070404102642455201154_41-32512F_ML
> _Series.pdf
>
>
> That transformer type is the 2 separate primaries, not the subject of this
> thread.
> Does anyone have the generic name for these wasteful construction made in or
> for USA , for export kit ? the ones with a (electrically) continuous single
> primary winding
>
>

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