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100V appliance on 110v power supply
I've got a Japanese-bought AKAI S1000 sampler that says "100v AC" on the
back. I live in the UK, where the power supply is 240V or thereabouts. Can I use a 110V transformer, or does it need to be strictly 100V? Thanks, -- tj hertz |
#2
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"TJ Hertz" I've got a Japanese-bought AKAI S1000 sampler that says "100v AC" on the back. I live in the UK, where the power supply is 240V or thereabouts. Can I use a 110V transformer, or does it need to be strictly 100V? ** Only by taking the item to an audio service shop and having them run tests ( using a " variac" and AC current meter) will you find out your answer. I often do this for customers so they know the right size and type of step-down to use. .......... Phil |
#3
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"TJ Hertz" wrote in message news I've got a Japanese-bought AKAI S1000 sampler that says "100v AC" on the back. I live in the UK, where the power supply is 240V or thereabouts. Can I use a 110V transformer, or does it need to be strictly 100V? Thanks, -- tj hertz It probably needs to be 100V. assuming it uses +/- 15Vdc internally the 10% or so may make the regulators run hot and therefore have shortened life. You can find the manual here http://www.vintagesynth.com/index2.html Its possible that the internal transformer can be required for your voltage. If not a buck/boost transformer in addition to the 240 to 120 step down transformer will be needed. An autotransformer would also work but i would not recomend it for the average user as it would be too easy for it to get misadjusted and consiquently blow up your vintage gear. |
#4
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"TJ Hertz" wrote ...
I've got a Japanese-bought AKAI S1000 sampler that says "100v AC" on the back. I live in the UK, where the power supply is 240V or thereabouts. Can I use a 110V transformer, or does it need to be strictly 100V? I wouldn't risk 110V. So get a 10-12V transformer and hook it up to "buck" part of the 110V to reduce it to ~100V. |
#5
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In rec.audio.pro, alt.electronics and alt.engineering.electrical, On
Tue, 31 May 2005 02:21:23 GMT, "TJ Hertz" wrote: I've got a Japanese-bought AKAI S1000 sampler that says "100v AC" on the back. I live in the UK, where the power supply is 240V or thereabouts. Can I use a 110V transformer, or does it need to be strictly 100V? As others answered, as-is it's best to put a 'nominal' 100V into it. But open it up (or look on the back panel, even), see if there are any switches or plugs around the transformer. There might be two, one to switch between 100V or 120V, the other for (100-120V) or (200-240V). It could be as easy as moving a plug around to make it work on a 'nominal' USA 120V line voltage. I looked at the manual, found he http://www.akaipro.com/archives.html direct link if you're really lazy: http://www.akaipro.com/archive_doc/S1000Manual.zip and didn't see anything about a 100V option. It says: 120VAC, 60Hz (USA, Canada) 220VAC, 50Hz (Europe, except UK) 240VAC, 50OHz (UK, Australia) but never says how to switch between them, or if it's possible or neccesary. I also have no clue whether this is a switching or a linear supply, though a knowledgable person could tell which it is with about three seconds of looking at the innards. This can make a difference in how and whether it can be (or even needs to be) switched. Thanks, ----- http://mindspring.com/~benbradley |
#6
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Richard Crowley wrote:
"TJ Hertz" wrote ... I've got a Japanese-bought AKAI S1000 sampler that says "100v AC" on the back. I live in the UK, where the power supply is 240V or thereabouts. Can I use a 110V transformer, or does it need to be strictly 100V? I wouldn't risk 110V. So get a 10-12V transformer and hook it up to "buck" part of the 110V to reduce it to ~100V. Can you explain this in more detail? Thanks. -- tj hertz |
#7
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TJ Hertz wrote:
Richard Crowley wrote: "TJ Hertz" wrote ... I've got a Japanese-bought AKAI S1000 sampler that says "100v AC" on the back. I live in the UK, where the power supply is 240V or thereabouts. Can I use a 110V transformer, or does it need to be strictly 100V? I wouldn't risk 110V. So get a 10-12V transformer and hook it up to "buck" part of the 110V to reduce it to ~100V. Can you explain this in more detail? Thanks. Usual warnings about this is mains and can easily kill. Usual warnings about getting it wrong can cause a fire and burn the house down. Usual warnings about not doing it unless you are a professional. Usual warnings about, at the very least, getting this wrong could destroy the equipment you are actually worrying about. Usual warnings about, if you have to ask what a "buck" or "boost" circuit is, you quite possibly don't have the knowledge and experience to be attempting this for the first time - especially on anything that you value. In theory: You get a mains to 10 or 12 volt transformer and connect its primary across the mains - thus producing 10 or 12 volts ac from the secondary. You get a mains to 110 volt transformer and connect its primary across the mains - thus producing 110 volts ac on its secondary. So the primaries are in parallel across the supply. Then you connect the secondaries in series, thus: You then take a wire from the 110 volts secondary terminal and connect it to one terminal of the 10/12 volts secondary. Measure the voltage between the remaining unused secondary terminals (one unused on each transformer secondary). If the voltage is 100 volts - then those are the terminals that you take power off for the load. If the voltage is too high (higher than either secondary on its own), move the link wire to ther other terminal on the 10/12 volt secondary and repeat. Bingo, it should have dropped and you should have 100 volts now. Basically, one secondary winding is made to be out of phase with the other and thus cancels out some of the voltage produced by it. One variant of the technique is to connect the secondary of the second transformer in series with the primary of the first. There are other variants. However, it all gets a little more complicated than that in practice. Picking the right transformers is the key - particularly as small transformers typically have terrible regulation and their output voltages can vary widely with load. Thus, while the output voltage may look fine off load - it can change substantially when load is applied. For many bits of equipment, too low a supply voltage can be as bad as too high. Personally, if I was concerned that the voltage was out of specification for the equipment, I would use a variac and set the voltage precisely, whilst on load. You can get little variacs cheaply enough - try ebay, for example, that is where I have got several of mine. Once set, fix the adjusting knob in place - if it gets accidently moved you would be in the doo doo. You can buy them bare or in an enclosure with fitted mains lead and output socket - the latter may be what you are looking for.. -- HTH Sue |
#8
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The extension for japanese websites is .co.jp , and most products made for
japanese market aren't probably even listed in international sites.Even if TJ does it with the voltage, there's still the problem with the different mains frequency.Evenmore, I never liked the transformer solution, they are bulky, poorly constructed and add another ring in the chain so it's difficult to troubleshoot the appliance.IMHO TJ should buy something from the UK, that best fits his needs. -- Tzortzakakis Dimitrios major in electrical engineering, freelance electrician FH von Iraklion-Kreta, freiberuflicher Elektriker dimtzort AT otenet DOT gr ? "Ben Bradley" ?????? ??? ?????? ... In rec.audio.pro, alt.electronics and alt.engineering.electrical, On Tue, 31 May 2005 02:21:23 GMT, "TJ Hertz" wrote: I've got a Japanese-bought AKAI S1000 sampler that says "100v AC" on the back. I live in the UK, where the power supply is 240V or thereabouts. Can I use a 110V transformer, or does it need to be strictly 100V? As others answered, as-is it's best to put a 'nominal' 100V into it. But open it up (or look on the back panel, even), see if there are any switches or plugs around the transformer. There might be two, one to switch between 100V or 120V, the other for (100-120V) or (200-240V). It could be as easy as moving a plug around to make it work on a 'nominal' USA 120V line voltage. I looked at the manual, found he http://www.akaipro.com/archives.html direct link if you're really lazy: http://www.akaipro.com/archive_doc/S1000Manual.zip and didn't see anything about a 100V option. It says: 120VAC, 60Hz (USA, Canada) 220VAC, 50Hz (Europe, except UK) 240VAC, 50OHz (UK, Australia) but never says how to switch between them, or if it's possible or neccesary. I also have no clue whether this is a switching or a linear supply, though a knowledgable person could tell which it is with about three seconds of looking at the innards. This can make a difference in how and whether it can be (or even needs to be) switched. Thanks, ----- http://mindspring.com/~benbradley |
#9
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"Dimitrios Tzortzakakis" wrote...
The extension for japanese websites is .co.jp , and most products made for japanese market aren't probably even listed in international sites.Even if TJ does it with the voltage, there's still the problem with the different mains frequency. Usually only high-power equipment, or older equipment that uses synchronous motors is mains-frequency sensitive. This classic synth seems like it would not fit into either category. Evenmore, I never liked the transformer solution, they are bulky, poorly constructed and add another ring in the chain so it's difficult to troubleshoot the appliance. No question that transformers are all that. IMHO TJ should buy something from the UK, that best fits his needs. Seems unlikely that anyone could find a classic (which I took to mean long out of production) Japanese synth wired for UK power. |
#10
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"Dimitrios Tzortzakakis" The extension for japanese websites is .co.jp , and most products made for japanese market aren't probably even listed in international sites.Even if TJ does it with the voltage, there's still the problem with the different mains frequency. ** Japan has both 50Hz and 60 Hz AC power, see: http://kropla.com/electric2.htm As a result, appliances made for their local market normally have transformers made to cope with 50 Hz. As a rule, even Japanese gear sold into the USA is OK on 50 Hz power, it is only US and Canadian made gear sold for local use where the transformers are sized purely for 60 Hz. ............. Phil |
#11
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"Richard Crowley" Usually only high-power equipment, or older equipment that uses synchronous motors is mains-frequency sensitive. This classic synth seems like it would not fit into either category. ** Err - what is your idea of "high-power" ?? I regularly see AC transformers that run at an unsafe high temp because of being used on 50 Hz power - when they were originally engineered for 60 Hz. The VA ratings involved are anywhere from 5 VA upwards. Where low temp grades of enamel wire ( ie 90C) have been used - burn out failures are a common event too. Seems unlikely that anyone could find a classic (which I took to mean long out of production) Japanese synth wired for UK power. ** Huh ???? So you think that Akai never sold export models of a "classic" synth into the UK, Europe and Aussie ?? ............. Phil |
#12
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On Tue, 31 May 2005 02:21:23 GMT, "TJ Hertz"
wrote: I've got a Japanese-bought AKAI S1000 sampler that says "100v AC" on the back. I live in the UK, where the power supply is 240V or thereabouts. Can I use a 110V transformer, or does it need to be strictly 100V? Thanks, You may have 2 problems: 1) Japan is 60Hz, UK is 50 Hz. Mains transformers and motors need more iron for 50Hz and may overheat without it. 2) 240 to 100V Voltage, It may be simpler to go the 240V @ 50Hz to 12VDC and run a 60Hz inverter designed for Japans 100V. , _ , | \ MKA: Steve Urbach , | )erek No JUNK in my email please , ____|_/ragonsclaw , / / / Running United Devices "Cure For Cancer" Project 24/7 Have you helped? http://www.grid.org |
#13
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"Steve Urbach" "TJ Hertz" I've got a Japanese-bought AKAI S1000 sampler that says "100v AC" on the back. I live in the UK, where the power supply is 240V or thereabouts. Can I use a 110V transformer, or does it need to be strictly 100V? You may have 2 problems: 1) Japan is 60Hz, UK is 50 Hz. Mains transformers and motors need more iron for 50Hz and may overheat without it. ** Japan has both 50Hz and 60 Hz AC power, see: http://kropla.com/electric2.htm As a result, appliances made for their local market normally have transformers made to cope with 50 Hz. 2) 240 to 100V Voltage, It may be simpler to go the 240V @ 50Hz to 12VDC and run a 60Hz inverter designed for Japans 100V. ** Insane. ............... Phil |
#14
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it will be very high not only the voltage as transformers are often
220/110 it would mean you will have 120 on your transformer. better is to use a variac this way you can set it on around 80 volts and start it up. it is not only the voltage but also the frequency change. a small variac is rather cheap. |
#15
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So, that's a synth?I thought that TJ with "sampler"meant some new japanese,
super high-tech device yet unknown to me.Then definitely, find maybe some electrician or some kind of expert, that will take the responsibility (very important point) to make your vintage gear working in UK. -- Tzortzakakis Dimitrios major in electrical engineering, freelance electrician FH von Iraklion-Kreta, freiberuflicher Elektriker dimtzort AT otenet DOT gr ? "Richard Crowley" ?????? ??? ?????? ... "Dimitrios Tzortzakakis" wrote... The extension for japanese websites is .co.jp , and most products made for japanese market aren't probably even listed in international sites.Even if TJ does it with the voltage, there's still the problem with the different mains frequency. Usually only high-power equipment, or older equipment that uses synchronous motors is mains-frequency sensitive. This classic synth seems like it would not fit into either category. Evenmore, I never liked the transformer solution, they are bulky, poorly constructed and add another ring in the chain so it's difficult to troubleshoot the appliance. No question that transformers are all that. IMHO TJ should buy something from the UK, that best fits his needs. Seems unlikely that anyone could find a classic (which I took to mean long out of production) Japanese synth wired for UK power. |
#16
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I understand that, but I think that probably japanese products will have
labels and instructions in japanese, and most companies have an entirely different brand-name in japanese, than in export models.The problems with different voltages and frequencies appear in European Union railways.In Switzerland,Austria and Germany, the catenary system is 15kV, 16 2/3 HZ, and of course everything, from normal locomotives to the high speed ICE is designed only for this.In France is 1.5 kV and 3 kV DC, and in Greece we have now 25 kV 50 Hz, so a German series locomotive would be totally useless. -- Tzortzakakis Dimitrios major in electrical engineering, freelance electrician FH von Iraklion-Kreta, freiberuflicher Elektriker dimtzort AT otenet DOT gr Ο "Phil Allison" έγραψε στο μήνυμα ... "Dimitrios Tzortzakakis" The extension for japanese websites is .co.jp , and most products made for japanese market aren't probably even listed in international sites.Even if TJ does it with the voltage, there's still the problem with the different mains frequency. ** Japan has both 50Hz and 60 Hz AC power, see: http://kropla.com/electric2.htm As a result, appliances made for their local market normally have transformers made to cope with 50 Hz. As a rule, even Japanese gear sold into the USA is OK on 50 Hz power, it is only US and Canadian made gear sold for local use where the transformers are sized purely for 60 Hz. ............ Phil |
#17
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"Dimitrios Tzortzakakis" I understand that, ** Like ****ing hell you do. but I think that probably japanese products will have labels and instructions in japanese, and most companies have an entirely different brand-name in japanese, than in export models. ** The unit is a local Japanese model ( hence rated for 100 volts) - see the original post. The problems with different voltages and frequencies appear in European Union railways. ** Tres ****ing irrelevant - mate. ............ Phil In Switzerland,Austria and Germany, the catenary system is 15kV, 16 2/3 HZ, and of course everything, from normal locomotives to the high speed ICE is designed only for this.In France is 1.5 kV and 3 kV DC, and in Greece we have now 25 kV 50 Hz, so a German series locomotive would be totally useless. -- Tzortzakakis Dimitrios major in electrical engineering, freelance electrician FH von Iraklion-Kreta, freiberuflicher Elektriker dimtzort AT otenet DOT gr Ο "Phil Allison" έγραψε στο μήνυμα ... "Dimitrios Tzortzakakis" The extension for japanese websites is .co.jp , and most products made for japanese market aren't probably even listed in international sites.Even if TJ does it with the voltage, there's still the problem with the different mains frequency. ** Japan has both 50Hz and 60 Hz AC power, see: http://kropla.com/electric2.htm As a result, appliances made for their local market normally have transformers made to cope with 50 Hz. As a rule, even Japanese gear sold into the USA is OK on 50 Hz power, it is only US and Canadian made gear sold for local use where the transformers are sized purely for 60 Hz. ............ Phil |
#18
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On Tue, 31 May 2005 02:21:23 +0000, TJ Hertz wrote:
I've got a Japanese-bought AKAI S1000 sampler that says "100v AC" on the back. I live in the UK, where the power supply is 240V or thereabouts. Can I use a 110V transformer, or does it need to be strictly 100V? As you've probably noticed by now, there's lots of noise on USENET. If you can get a UK/100V transformer, do that, unless the AKAI is switch- or jumper-selectable for different mains - I noticed that the manual does mention UK wiring, but it was about taking care that it's earthed properly and that hot and neutral are wired properly - this suggests to me that there is either a jumper plug, a switch, or a terminal board to select mains voltage. If so, then clearly this is the way to go. If there isn't a switch or jumper plug on the back panel, and you're not afraid to open up the case, take a look. It might be glaringly obvious what you need to do, but if you see no options whatever, then use the transformer. If it looks like there are options for different solder connections, you might be able to figure it out, if you're handy with a soldering iron. If you aren't confident of your electronics skills, the wisest course of action (unless you can get a proper 240/100V transformer for less than, say, UKP35-50) your safest option is to take it to a qualified service person - they could do the switchover in a matter of minutes, if it can be switched over. Failing that, the transformer is the only option. I'm hesitant to recommend a buck arrangement, unless you're confident that you know what you're doing, but if it isn't switchable, and you already have the 110V transformer, then this would be the cheapest. Good Luck! Rich |
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