Heath product with 120/240 slide switch instead of diff. wiring

[van lincoln wd8aam]

excellent point well made!!!
wd8aam

At 11:06 PM 9/1/2002 -0500, Marshall wrote:
>Hello, Murray and Group,
>
>The reason you don't see equipment switched for 120/240 volts is
>two-fold:
>        1. 120 volt line cord plugs are different from 240 volt plugs.
>           Look at your toaster, and then your electric clothes dryer!
>
>        2. If this switch was set for 240 volts and assuming you could
>           plug it into 120 volts, the secondary voltage would only be
>           one half of what it was when selected for 240 volts, BUT...
>           if the switch was set for 120 volts and you were able to
>           plug it into 240 volts, the secondary winding would be TWICE
>           as much, and that would absolutely ruin your day.
>
>Marshall M. Dues - WB5MYO
>Katy, Texas
>
>
>multi-volti at MULTI-VOLTI.COM wrote:
>>
>> Hello:
>>
>> I have been randomly looking on the Heathkit circuit archive sites for any
>> product that shows a DPDT switch wired to select 120 or 240 primary. Many
>> simply showed alternate transformer primary wiring to be selected at
time of
>> construction.
>>
>> Some of the oscilloscopes have a triple wiring arrangement - 120/240 plus
>> low/normal  or normal/high line.
>>
>> Can someone identify a product they know has a 120/240 switch-selectable
>> primary? I am trying to show someone how a switch is wired to effect this
>> feature.
>>
>> Thanks
>>
>> Murray
>>
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