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Always remember to ask the seller of an electric to provide you with a photo like this one...
I was 2-3 minutes away from hitting the "Buy" button on this Olympia SGE-60 and then took the time to ask the seller for an additional photo.
This is what he sent and the reason I put away my wallet.
.
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A seller's location with respect to your own should be the first flag; however, I suppose the low possibility exists that someone in your own country could be trying to pass on an electrical device that was imported by them and required a different power supply.
There are at least four different domestic power supply standards around the world (220-240v 50 and 60hz; 100-125v 50 and 60hz) and the 240v 50hz required by that Olympia is probably the most common system in the world.
Considering all of this I wouldn't be immediately dissuaded from buying an electric typewriter designed for use on a different power system. Ultimately it would depend on how badly I wanted a specific model and its availability - and of course what I was willing to spend to adapt it. In this case the SGE60 has a modest power requirement and a transformer to power it wouldn't be that expensive - if the frequency was the same. Frequency converters are another matter. I've never priced one, but they're available and it's all doable. In the case of this SGE where it's only a motor that's involved, replacing it would also be an option, as would possibly having the original one rewound.
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I have had a number of enquiries from potential customers who have bought an electric or electronic typewriter from a well-known internet auction site in America, had it sent to the UK, taken that funny American plug off the end of the lead and put a British one on - then plugged it into the 240 volt mains ! After the smoke and burning smell has cleared, then contacted me to ask if it is an easy repair ! One chap with a Smith-Corona electric wanted the machine so badly that he bought a British-market model and sent it to me together with his 'fried' USA one for a motor transplant. No as easy as you might think because due to the different 60 cycles frequency the motor runs faster than a UK model. I had to change the entire power train over. Yes, do check the voltage before buying
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Greetings
As Tom says, even if one gets a step up or step down transformer so the voltage is correct, the motor RPM will not be correct. A typical 2 pole induction motor will run at 3,000 rpm* on UK electricity and 3,600 rpm* on US electricity. Sewing machines are different beasts as they have variable speed repulsion motors with commutators and brushes. It's not uncommon to see a British family who have moved to North America bring their sewing machine with them and buy a voltage converter once they get here. All the best,
Sky
*Actual RPM on a normal induction motor will be a little slower due to the inerrant slip speed. Synchronous motors as used in electric clocks run at the exact RPM stated.