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Thread View: de.sci.electronics
6 messages
6 total messages Started by Kaufmann Wed, 02 Aug 1995 00:00
Current converter (Europe - USA)
#154
Author: Kaufmann
Date: Wed, 02 Aug 1995 00:00
12 lines
1394 bytes
Hi there,
I look for a converter from 220V~50Hz to 110V~60Hz (I'm going to America and
have to use a few things, like my modem). I know where I can buy such
converters for 100W and 200W, but I don't need that much.
My questions are: Where do I get such a converter for less than 100W (about 10
- 20W), do they exist? Would it be safe to build them on your own and if yes,
how?
It would make me happy if anybody could give me an answer. Thank you.

                                 
                                Sandor
                      sfkaufma@stud.ee.ethz.ch
Re: Current converter (Europe - USA)
#155
Author: hippolyte tournier
Date: Wed, 02 Aug 1995 00:00
21 lines
1681 bytes
Kaufmann <sfkaufma> wrote:
>
> Hi there,
> I look for a converter from 220V~50Hz to 110V~60Hz (I'm going to America and
> 

hi Sandor,

Most appliances will work using a step up transformer that brings up the 110 or 117v
that you find in the USA to 220v.
There are a few cases of appliances or devices thatwill not work well with a differnt mains frequency.
I personally had an answering machine that could not work properly,and many clocks also will esxperience problems.
The difficulties arise because these devices use the frequency of the electrical supply as the time base for their
clocks.
Another problem may be that some motors do no tolerate the change in frequency and may overheat.A fridge motor for instance
will run faster at 60 HZ than at 50,it may overheat.

There are no simple devices to change the current from 220v/50hz to 117v/60 
hz.
If you could specify what items you want to use in the USA,I could
perhaps tell you the chances that they work well.
Re: Current converter (Europe - USA)
#156
Author: hippolyte tournier
Date: Wed, 02 Aug 1995 00:00
21 lines
1681 bytes
Kaufmann <sfkaufma> wrote:
>
> Hi there,
> I look for a converter from 220V~50Hz to 110V~60Hz (I'm going to America and
> 

hi Sandor,

Most appliances will work using a step up transformer that brings up the 110 or 117v
that you find in the USA to 220v.
There are a few cases of appliances or devices thatwill not work well with a differnt mains frequency.
I personally had an answering machine that could not work properly,and many clocks also will esxperience problems.
The difficulties arise because these devices use the frequency of the electrical supply as the time base for their
clocks.
Another problem may be that some motors do no tolerate the change in frequency and may overheat.A fridge motor for instance
will run faster at 60 HZ than at 50,it may overheat.

There are no simple devices to change the current from 220v/50hz to 117v/60 
hz.
If you could specify what items you want to use in the USA,I could
perhaps tell you the chances that they work well.
Re: Current converter (Europe - USA)
#157
Author: fromherz
Date: Thu, 03 Aug 1995 00:00
184 lines
9695 bytes
To: Kaufmann <sfkaufma>
Subject: Re: Current converter (Europe - USA)


In article <3vnruu$dsh@elna.ethz.ch>, you write:
> Hi there,
> I look for a converter from 220V~50Hz to 110V~60Hz (I'm going to America and
> have to use a few things, like my modem). I know where I can buy such
> converters for 100W and 200W, but I don't need that much.
> My questions are: Where do I get such a converter for less than 100W (about 10
> - 20W), do they exist? Would it be safe to build them on your own and if yes,
> how?
you can build them on your own if you like. go to a special shop that sells transformer 
coils (there is one in oerlikon), buy a coil of your size, buy a metal of plastic case to fit
it in (same shop), buy a CH plug-in (special one, eg in the electronic shop in 
hirschengraben), add a cable with US plug for power supply (hirschengraben) - that's it ...

easy  hugh? (i did it for a slightly bigger setup, multiple plug ins)

THE EASIER WAY, of course, is to buy the whole stuff in a low cost electronic shop
in the states (eg. Fry's (West coast), Lechmere (East Coast), or on Canal St in NYC...).
it's a lot cheaper and smaller than what you can build on your own.

BTW: there are converter with coils (a bit bigger) and electronic ones (no coils).
the cheap electronic ones are usually good enough for the everyday appliance, however,
if what you need is nice steady signal you want to invest more or get a coil converter.

good luck
-thomas


To: Kaufmann <sfkaufma>
Subject: Re: Current converter (Europe - USA)


In article <3vnruu$dsh@elna.ethz.ch>, you write:
> Hi there,
> I look for a converter from 220V~50Hz to 110V~60Hz (I'm going to America and
> have to use a few things, like my modem). I know where I can buy such
> converters for 100W and 200W, but I don't need that much.
> My questions are: Where do I get such a converter for less than 100W (about 10
> - 20W), do they exist? Would it be safe to build them on your own and if yes,
> how?
you can build them on your own if you like. go to a special shop that sells transformer 
coils (there is one in oerlikon), buy a coil of your size, buy a metal of plastic case to fit
it in (same shop), buy a CH plug-in (special one, eg in the electronic shop in 
hirschengraben), add a cable with US plug for power supply (hirschengraben) - that's it ...

easy  hugh? (i did it for a slightly bigger setup, multiple plug ins)

THE EASIER WAY, of course, is to buy the whole stuff in a low cost electronic shop
in the states (eg. Fry's (West coast), Lechmere (East Coast), or on Canal St in NYC...).
it's a lot cheaper and smaller than what you can build on your own.

BTW: there are converter with coils (a bit bigger) and electronic ones (no coils).
the cheap electronic ones are usually good enough for the everyday appliance, however,
if what you need is nice steady signal you want to invest more or get a coil converter.

good luck
-thomas


To: Kaufmann <sfkaufma>
Subject: Re: Current converter (Europe - USA)


In article <3vnruu$dsh@elna.ethz.ch>, you write:
> Hi there,
> I look for a converter from 220V~50Hz to 110V~60Hz (I'm going to America and
> have to use a few things, like my modem). I know where I can buy such
> converters for 100W and 200W, but I don't need that much.
> My questions are: Where do I get such a converter for less than 100W (about 10
> - 20W), do they exist? Would it be safe to build them on your own and if yes,
> how?
you can build them on your own if you like. go to a special shop that sells transformer 
coils (there is one in oerlikon), buy a coil of your size, buy a metal of plastic case to fit
it in (same shop), buy a CH plug-in (special one, eg in the electronic shop in 
hirschengraben), add a cable with US plug for power supply (hirschengraben) - that's it ...

easy  hugh? (i did it for a slightly bigger setup, multiple plug ins)

THE EASIER WAY, of course, is to buy the whole stuff in a low cost electronic shop
in the states (eg. Fry's (West coast), Lechmere (East Coast), or on Canal St in NYC...).
it's a lot cheaper and smaller than what you can build on your own.

BTW: there are converter with coils (a bit bigger) and electronic ones (no coils).
the cheap electronic ones are usually good enough for the everyday appliance, however,
if what you need is nice steady signal you want to invest more or get a coil converter.

good luck
-thomas


To: Kaufmann <sfkaufma>
Subject: Re: Current converter (Europe - USA)


In article <3vnruu$dsh@elna.ethz.ch>, you write:
> Hi there,
> I look for a converter from 220V~50Hz to 110V~60Hz (I'm going to America and
> have to use a few things, like my modem). I know where I can buy such
> converters for 100W and 200W, but I don't need that much.
> My questions are: Where do I get such a converter for less than 100W (about 10
> - 20W), do they exist? Would it be safe to build them on your own and if yes,
> how?
you can build them on your own if you like. go to a special shop that sells transformer 
coils (there is one in oerlikon), buy a coil of your size, buy a metal of plastic case to fit
it in (same shop), buy a CH plug-in (special one, eg in the electronic shop in 
hirschengraben), add a cable with US plug for power supply (hirschengraben) - that's it ...

easy  hugh? (i did it for a slightly bigger setup, multiple plug ins)

THE EASIER WAY, of course, is to buy the whole stuff in a low cost electronic shop
in the states (eg. Fry's (West coast), Lechmere (East Coast), or on Canal St in NYC...).
it's a lot cheaper and smaller than what you can build on your own.

BTW: there are converter with coils (a bit bigger) and electronic ones (no coils).
the cheap electronic ones are usually good enough for the everyday appliance, however,
if what you need is nice steady signal you want to invest more or get a coil converter.

good luck
-thomas


To: Kaufmann <sfkaufma>
Subject: Re: Current converter (Europe - USA)


In article <3vnruu$dsh@elna.ethz.ch>, you write:
> Hi there,
> I look for a converter from 220V~50Hz to 110V~60Hz (I'm going to America and
> have to use a few things, like my modem). I know where I can buy such
> converters for 100W and 200W, but I don't need that much.
> My questions are: Where do I get such a converter for less than 100W (about 10
> - 20W), do they exist? Would it be safe to build them on your own and if yes,
> how?
you can build them on your own if you like. go to a special shop that sells transformer 
coils (there is one in oerlikon), buy a coil of your size, buy a metal of plastic case to fit
it in (same shop), buy a CH plug-in (special one, eg in the electronic shop in 
hirschengraben), add a cable with US plug for power supply (hirschengraben) - that's it ...

easy  hugh? (i did it for a slightly bigger setup, multiple plug ins)

THE EASIER WAY, of course, is to buy the whole stuff in a low cost electronic shop
in the states (eg. Fry's (West coast), Lechmere (East Coast), or on Canal St in NYC...).
it's a lot cheaper and smaller than what you can build on your own.

BTW: there are converter with coils (a bit bigger) and electronic ones (no coils).
the cheap electronic ones are usually good enough for the everyday appliance, however,
if what you need is nice steady signal you want to invest more or get a coil converter.

good luck
-thomas


To: Kaufmann <sfkaufma>
Subject: Re: Current converter (Europe - USA)


In article <3vnruu$dsh@elna.ethz.ch>, you write:
> Hi there,
> I look for a converter from 220V~50Hz to 110V~60Hz (I'm going to America and
> have to use a few things, like my modem). I know where I can buy such
> converters for 100W and 200W, but I don't need that much.
> My questions are: Where do I get such a converter for less than 100W (about 10
> - 20W), do they exist? Would it be safe to build them on your own and if yes,
> how?
you can build them on your own if you like. go to a special shop that sells transformer 
coils (there is one in oerlikon), buy a coil of your size, buy a metal of plastic case to fit
it in (same shop), buy a CH plug-in (special one, eg in the electronic shop in 
hirschengraben), add a cable with US plug for power supply (hirschengraben) - that's it ...

easy  hugh? (i did it for a slightly bigger setup, multiple plug ins)

THE EASIER WAY, of course, is to buy the whole stuff in a low cost electronic shop
in the states (eg. Fry's (West coast), Lechmere (East Coast), or on Canal St in NYC...).
it's a lot cheaper and smaller than what you can build on your own.

BTW: there are converter with coils (a bit bigger) and electronic ones (no coils).
the cheap electronic ones are usually good enough for the everyday appliance, however,
if what you need is nice steady signal you want to invest more or get a coil converter.

good luck
-thomas
Re: Current converter (Europe - USA)
#158
Author: Gerald Evans
Date: Thu, 03 Aug 1995 00:00
28 lines
1882 bytes
In article <3vnruu$dsh@elna.ethz.ch> sfkaufma writes:

> Hi there,
> I look for a converter from 220V~50Hz to 110V~60Hz (I'm going to America and
> have to use a few things, like my modem). I know where I can buy such
                                                   ^^^^^^^^^^^^^^^^^^^^
> converters for 100W and 200W, but I don't need that much.
  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
I bet none of those converters will actually change the frequency,
as that would be quite hard to do, I'd imagine.

> My questions are: Where do I get such a converter for less than 100W (about 10
> - 20W), do they exist? Would it be safe to build them on your own and if yes,
> how?

Just use a transformer I'd say...

A modem will use DC anyway, and would probably just have a
wall PSU. It would be easier to get a more appropraiatly
rated one of these, surely?

> It would make me happy if anybody could give me an answer. Thank you.

--Dan Evans.
(Using my Father's a/c at the moment)
Email via gevans@cafe.glassnet.com at the moment, but usually to
dan.evans@sjc.ox.ac.uk
http://sable.ox.ac.uk/~sjoh0014/
Re: Current converter (Europe - USA)
#159
Author: Hans-Peter Zimmermann
Date: Fri, 04 Aug 1995 00:00
19 lines
1361 bytes
Hallo

Die Firma *The Sharper Image* verkauft ein *Traveller Set*, in dem ein 
Low-Cost-Trafo 220/110V enthalten ist.

Solltest Du dennoch einmal groessere (bis 1000W) step-up/step-down 
Trafos benoetigen, hier ist die Adresse:

Hybernetics Inc.
225 Sutton Pl.
Santa Rosa CA 95407
(707) 585-0333

Mein Buero laeuft auf 220 Volt. Null Problem!

Hans-Peter
**********************************************
Check out my Web-page (in German)! Schau doch mal rein!
http://www.deltanet.com/apm/
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