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power up a 240v mac classic with 120v? [message #391848] Sat, 04 January 2020 17:34 Go to next message
engrav is currently offline  engrav
Messages: 5
Registered: March 2013
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Junior Member
Hi

Have a 240v Mac Classic
Is there any way to power it up with 120v in the US?
Thank you

Loren Engrav

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Re: power up a 240v mac classic with 120v? [message #391849 is a reply to message #391848] Sat, 04 January 2020 17:38 Go to previous messageGo to next message
Clark Martin is currently offline  Clark Martin
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Registered: August 2012
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Senior Member
Did you check the computer’s input voltage range, it might work on 120 too.

Clark Martin
A designated driver on the information Super Highway

> On Jan 4, 2020, at 2:34 PM, engrav <lengrav@gmail.com> wrote:
>
> Hi
>
> Have a 240v Mac Classic
> Is there any way to power it up with 120v in the US?
> Thank you

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Re: power up a 240v mac classic with 120v? [message #391850 is a reply to message #391849] Sat, 04 January 2020 17:48 Go to previous messageGo to next message
engrav is currently offline  engrav
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hi
thanks
took the case off, check box says configured for 240, check box for 120 not checked

> On Jan 4, 2020, at 2:38 PM, Clark Martin <cmmac@sonic.net> wrote:
>
> Did you check the computer’s input voltage range, it might work on 120 too.
>
> Clark Martin
> A designated driver on the information Super Highway
>
>> On Jan 4, 2020, at 2:34 PM, engrav <lengrav@gmail.com <mailto:lengrav@gmail.com>> wrote:
>>
>> Hi
>>
>> Have a 240v Mac Classic
>> Is there any way to power it up with 120v in the US?
>> Thank you
>
>
> --
> --
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> You received this message because you are a member of the Vintage Macs group.
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Re: power up a 240v mac classic with 120v? [message #391851 is a reply to message #391850] Sat, 04 January 2020 23:48 Go to previous messageGo to next message
NODEraser is currently offline  NODEraser
Messages: 94
Registered: June 2013
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Member
You could buy a step-up transformer, they make ones especially for
small appliances and such.

--
[Greg Bennett]
-Independent Carpenter, Electrician & Lighting Designer
-Purveyor of Classic Apple & Macintosh Gear
http://www.hsiprodsvcs.com/
http://www.macshack.us/

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Re: power up a 240v mac classic with 120v? [message #391852 is a reply to message #391851] Sun, 05 January 2020 00:44 Go to previous messageGo to next message
engrav is currently offline  engrav
Messages: 5
Registered: March 2013
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Junior Member
thank you
will explore ‘em


> On Jan 4, 2020, at 8:48 PM, NODEraser <noderaser@gmail.com> wrote:
>
> You could buy a step-up transformer, they make ones especially for
> small appliances and such.
>
> --
> [Greg Bennett]
> -Independent Carpenter, Electrician & Lighting Designer
> -Purveyor of Classic Apple & Macintosh Gear
> http://www.hsiprodsvcs.com/
> http://www.macshack.us/
>
> --
> --
> -----
> You received this message because you are a member of the Vintage Macs group.
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Re: power up a 240v mac classic with 120v? [message #391853 is a reply to message #391848] Tue, 07 January 2020 13:12 Go to previous messageGo to next message
Thomas Pfaff is currently offline  Thomas Pfaff
Messages: 17
Registered: April 2019
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Junior Member
That machine has an analog supply board, apparently, in the case.

Hard to say. If you're really really good with electronics and know how to
avoid being shocked off of unplugged electronics (CRTs+capacitors), you may
be able to take the analog supply board out and replace caps with US values
and get the board to output 110v. However, it will not be an easy path.

That's a lot of work to try and figure out the differences between the
US+foreign power supply boards + retrofit parts.
Not quite as hard, but still hard, would be to source a power supply board
for the US version, then replace that.



Consider a 110V->220V AC power converter rated for the wattage required by
the Mac Classic.
I can understand... it's a cute little machine.
However, if you don't really know what you're doing you could receive a
fatal shock working around in that case.

A random, separate note on capacitors:
BTW I find that pre-1990s capacitors generally do pretty well and don't
need replacing. Japan made high quality capacitors until their factories
closed down.
Once caps went chinese + se asian well... those are a different story.
Modern capacitors (the chinese ones at least) should be swapped out every
decade for anything you care about. Please disregard if you source your
capacitors, US made, from North Carolina. The audio freaks I know who
design/recap with those say they're really good quality.

Thomas


On Sat, Jan 4, 2020 at 2:34 PM engrav <lengrav@gmail.com> wrote:

> Hi
>
> Have a 240v Mac Classic
> Is there any way to power it up with 120v in the US?
> Thank you
>
> Loren Engrav
>
> --
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> You received this message because you are a member of the Vintage Macs
> group.
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> netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml
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> vintage-macs+unsubscribe@googlegroups.com
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> http://groups.google.com/group/vintage-macs
>
> Support for older Macs: http://lowendmac.com/services/
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> .
>

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Re: power up a 240v mac classic with 120v? [message #391854 is a reply to message #391853] Tue, 07 January 2020 13:17 Go to previous messageGo to next message
engrav is currently offline  engrav
Messages: 5
Registered: March 2013
Karma: 0
Junior Member
thanks

since I am not electronic expert
and
on ebay they sell for not much

I think I think
off to recycle



> On Jan 7, 2020, at 10:12 AM, Thomas Pfaff <tpfaff100@gmail.com> wrote:
>
> That machine has an analog supply board, apparently, in the case.
>
> Hard to say. If you're really really good with electronics and know how to avoid being shocked off of unplugged electronics (CRTs+capacitors), you may be able to take the analog supply board out and replace caps with US values and get the board to output 110v. However, it will not be an easy path.
>
> That's a lot of work to try and figure out the differences between the US+foreign power supply boards + retrofit parts.
> Not quite as hard, but still hard, would be to source a power supply board for the US version, then replace that.
>
>
>
> Consider a 110V->220V AC power converter rated for the wattage required by the Mac Classic.
> I can understand... it's a cute little machine.
> However, if you don't really know what you're doing you could receive a fatal shock working around in that case.
>
> A random, separate note on capacitors:
> BTW I find that pre-1990s capacitors generally do pretty well and don't need replacing. Japan made high quality capacitors until their factories closed down.
> Once caps went chinese + se asian well... those are a different story. Modern capacitors (the chinese ones at least) should be swapped out every decade for anything you care about. Please disregard if you source your capacitors, US made, from North Carolina. The audio freaks I know who design/recap with those say they're really good quality.
>
> Thomas
>
>
> On Sat, Jan 4, 2020 at 2:34 PM engrav <lengrav@gmail.com <mailto:lengrav@gmail.com>> wrote:
> Hi
>
> Have a 240v Mac Classic
> Is there any way to power it up with 120v in the US?
> Thank you
>
> Loren Engrav
>
> --
> --
> -----
> You received this message because you are a member of the Vintage Macs group.
> The list FAQ is at http://lowendmac.com/lists/vintagemacs.shtml <http://lowendmac.com/lists/vintagemacs.shtml> and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml <http://www.lowendmac.com/lists/netiquette.shtml>
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>
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Re: power up a 240v mac classic with 120v? [message #391855 is a reply to message #391848] Tue, 07 January 2020 13:22 Go to previous messageGo to next message
Dylan McDermond is currently offline  Dylan McDermond
Messages: 131
Registered: August 2012
Karma: 0
Senior Member


> On Jan 4, 2020, at 2:34 PM, engrav <lengrav@gmail.com> wrote:
>
> Hi
>
> Have a 240v Mac Classic
> Is there any way to power it up with 120v in the US?

This page:

https://frescho.hu/macintosh-classic-120v-240v-atalakitas/

Outlines the changes needed to switch a 110V board to 220V. Translated from Hungarian to English:

https://translate.google.com/translate?sl=hu&tl=en&u =https%3A%2F%2Ffrescho.hu%2Fmacintosh-classic-120v-240v-atal akitas%2F

- Dylan

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Re: power up a 240v mac classic with 120v? [message #391856 is a reply to message #391853] Tue, 07 January 2020 13:28 Go to previous messageGo to next message
William Stillwell is currently offline  William Stillwell
Messages: 29
Registered: June 2016
Karma: 0
Junior Member
According to the schematics, J1 is cut for 240 volt.. I would pop it open,
check JP1, if open, short it, and then run it at 120v. Make sure you put a
label on the back to indicate its been converted to 120v.

https://github.com/nickpunt/nubus-se30/blob/master/Schematic s/bomarc/Macintosh%20Classic%20Schematic%20(bomarc).pdf




William Stillwell

Board Member - Inspiration labs, Inc. a 501c3 organization

Board Member & Co-Founder - Byte Amusement Group // Free Play Florida
Arcade & Pinball Show a 501c3 organization




On Tue, Jan 7, 2020 at 1:12 PM Thomas Pfaff <tpfaff100@gmail.com> wrote:

> That machine has an analog supply board, apparently, in the case.
>
> Hard to say. If you're really really good with electronics and know how
> to avoid being shocked off of unplugged electronics (CRTs+capacitors), you
> may be able to take the analog supply board out and replace caps with US
> values and get the board to output 110v. However, it will not be an easy
> path.
>
> That's a lot of work to try and figure out the differences between the
> US+foreign power supply boards + retrofit parts.
> Not quite as hard, but still hard, would be to source a power supply board
> for the US version, then replace that.
>
>
>
> Consider a 110V->220V AC power converter rated for the wattage required by
> the Mac Classic.
> I can understand... it's a cute little machine.
> However, if you don't really know what you're doing you could receive a
> fatal shock working around in that case.
>
> A random, separate note on capacitors:
> BTW I find that pre-1990s capacitors generally do pretty well and don't
> need replacing. Japan made high quality capacitors until their factories
> closed down.
> Once caps went chinese + se asian well... those are a different story.
> Modern capacitors (the chinese ones at least) should be swapped out every
> decade for anything you care about. Please disregard if you source your
> capacitors, US made, from North Carolina. The audio freaks I know who
> design/recap with those say they're really good quality.
>
> Thomas
>
>
> On Sat, Jan 4, 2020 at 2:34 PM engrav <lengrav@gmail.com> wrote:
>
>> Hi
>>
>> Have a 240v Mac Classic
>> Is there any way to power it up with 120v in the US?
>> Thank you
>>
>> Loren Engrav
>>
>> --
>> --
>> -----
>> You received this message because you are a member of the Vintage Macs
>> group.
>> The list FAQ is at http://lowendmac.com/lists/vintagemacs.shtml and our
>> netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml
>> To post to this group, send email to vintage-macs@googlegroups.com
>> To leave this group, send email to
>> vintage-macs+unsubscribe@googlegroups.com
>> For more options, visit this group at
>> http://groups.google.com/group/vintage-macs
>>
>> Support for older Macs: http://lowendmac.com/services/
>> ---
>> You received this message because you are subscribed to the Google Groups
>> "Vintage Macs" group.
>> To unsubscribe from this group and stop receiving emails from it, send an
>> email to vintage-macs+unsubscribe@googlegroups.com.
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>> < https://groups.google.com/d/msgid/vintage-macs/535765a0-5d23 -4a13-9690-f90ac3672dc3%40googlegroups.com?utm_medium=email& amp;utm_source=footer>
>> .
>>
> --
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Re: power up a 240v mac classic with 120v? [message #391857 is a reply to message #391856] Tue, 07 January 2020 13:29 Go to previous messageGo to next message
William Stillwell is currently offline  William Stillwell
Messages: 29
Registered: June 2016
Karma: 0
Junior Member
Also, maybe someone close to you would rather take it off your hands
instead of "Recycling it" as i wouldn't love to have a classic to my
collection.


William Stillwell

Board Member - Inspiration labs, Inc. a 501c3 organization

Board Member & Co-Founder - Byte Amusement Group // Free Play Florida
Arcade & Pinball Show a 501c3 organization




On Tue, Jan 7, 2020 at 1:28 PM William Stillwell <ki4swy@gmail.com> wrote:

> According to the schematics, J1 is cut for 240 volt.. I would pop it
> open, check JP1, if open, short it, and then run it at 120v. Make sure you
> put a label on the back to indicate its been converted to 120v.
>
>
> https://github.com/nickpunt/nubus-se30/blob/master/Schematic s/bomarc/Macintosh%20Classic%20Schematic%20(bomarc).pdf
>
>
>
>
> William Stillwell
>
> Board Member - Inspiration labs, Inc. a 501c3 organization
>
> Board Member & Co-Founder - Byte Amusement Group // Free Play Florida
> Arcade & Pinball Show a 501c3 organization
>
>
>
>
> On Tue, Jan 7, 2020 at 1:12 PM Thomas Pfaff <tpfaff100@gmail.com> wrote:
>
>> That machine has an analog supply board, apparently, in the case.
>>
>> Hard to say. If you're really really good with electronics and know how
>> to avoid being shocked off of unplugged electronics (CRTs+capacitors), you
>> may be able to take the analog supply board out and replace caps with US
>> values and get the board to output 110v. However, it will not be an easy
>> path.
>>
>> That's a lot of work to try and figure out the differences between the
>> US+foreign power supply boards + retrofit parts.
>> Not quite as hard, but still hard, would be to source a power supply
>> board for the US version, then replace that.
>>
>>
>>
>> Consider a 110V->220V AC power converter rated for the wattage required
>> by the Mac Classic.
>> I can understand... it's a cute little machine.
>> However, if you don't really know what you're doing you could receive a
>> fatal shock working around in that case.
>>
>> A random, separate note on capacitors:
>> BTW I find that pre-1990s capacitors generally do pretty well and don't
>> need replacing. Japan made high quality capacitors until their factories
>> closed down.
>> Once caps went chinese + se asian well... those are a different story.
>> Modern capacitors (the chinese ones at least) should be swapped out every
>> decade for anything you care about. Please disregard if you source your
>> capacitors, US made, from North Carolina. The audio freaks I know who
>> design/recap with those say they're really good quality.
>>
>> Thomas
>>
>>
>> On Sat, Jan 4, 2020 at 2:34 PM engrav <lengrav@gmail.com> wrote:
>>
>>> Hi
>>>
>>> Have a 240v Mac Classic
>>> Is there any way to power it up with 120v in the US?
>>> Thank you
>>>
>>> Loren Engrav
>>>
>>> --
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>>> .
>>>
>> --
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>> < https://groups.google.com/d/msgid/vintage-macs/CADqfMZLPLi45 Gs8DW%2ByYPkJMOtbTd_nGWk4eHmrGPpt_7cqc7Q%40mail.gmail.com?ut m_medium=email&utm_source=footer>
>> .
>>
>

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Re: power up a 240v mac classic with 120v? [message #391858 is a reply to message #391854] Wed, 08 January 2020 08:06 Go to previous message
Jerri Kohl is currently offline  Jerri Kohl
Messages: 10
Registered: October 2018
Karma: 0
Junior Member
I (or someone else on here) would very gladly pay you to have it shipped to
me. It would be a real shame for one of these to end up destroyed. I could
even setup the payment through my FedEx account and you could just package
it up and drop it off at any Walgreens and show the code I would send you
for my shipping reservation.

On Tue, Jan 7, 2020 at 1:17 PM Loren Engrav <lengrav@gmail.com> wrote:

> thanks
>
> since I am not electronic expert
> and
> on ebay they sell for not much
>
> I think I think
> off to recycle
>
>
>
> On Jan 7, 2020, at 10:12 AM, Thomas Pfaff <tpfaff100@gmail.com> wrote:
>
> That machine has an analog supply board, apparently, in the case.
>
> Hard to say. If you're really really good with electronics and know how
> to avoid being shocked off of unplugged electronics (CRTs+capacitors), you
> may be able to take the analog supply board out and replace caps with US
> values and get the board to output 110v. However, it will not be an easy
> path.
>
> That's a lot of work to try and figure out the differences between the
> US+foreign power supply boards + retrofit parts.
> Not quite as hard, but still hard, would be to source a power supply board
> for the US version, then replace that.
>
>
>
> Consider a 110V->220V AC power converter rated for the wattage required by
> the Mac Classic.
> I can understand... it's a cute little machine.
> However, if you don't really know what you're doing you could receive a
> fatal shock working around in that case.
>
> A random, separate note on capacitors:
> BTW I find that pre-1990s capacitors generally do pretty well and don't
> need replacing. Japan made high quality capacitors until their factories
> closed down.
> Once caps went chinese + se asian well... those are a different story.
> Modern capacitors (the chinese ones at least) should be swapped out every
> decade for anything you care about. Please disregard if you source your
> capacitors, US made, from North Carolina. The audio freaks I know who
> design/recap with those say they're really good quality.
>
> Thomas
>
>
> On Sat, Jan 4, 2020 at 2:34 PM engrav <lengrav@gmail.com> wrote:
>
>> Hi
>>
>> Have a 240v Mac Classic
>> Is there any way to power it up with 120v in the US?
>> Thank you
>>
>> Loren Engrav
>>
>> --
>> --
>> -----
>> You received this message because you are a member of the Vintage Macs
>> group.
>> The list FAQ is at http://lowendmac.com/lists/vintagemacs.shtml and our
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>> vintage-macs+unsubscribe@googlegroups.com
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>> http://groups.google.com/group/vintage-macs
>>
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>> < https://groups.google.com/d/msgid/vintage-macs/535765a0-5d23 -4a13-9690-f90ac3672dc3%40googlegroups.com?utm_medium=email& amp;utm_source=footer>
>> .
>>
>
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