Thanks again Hugh, I see you are the same guy from the other thread. ;)
Hugh Robjohns wrote:I don't know the state and stability of your mains power supplies... but I'd say you're worrying too much.
Power losses, we have not so many, in fact I'd say rare, and the ones we do have been often caused by overload by our own side. What 'worries' me more are voltage fluctuations. It's not rare at all to see the house lights visibly dimming down and then brightening back up, and this happens quite often...
I have tested the voltage it over a few months, occasionally, using a multimeter, and the average is 220 V (I am based in Italy, where the nominal voltage is 230 V). Occasionally I have seen peaks of 240+ but also down peaks of 190 V. But I am not sure what I would see if I kept an eye constantly to the multimeter. The problem is that we only have 3,5 KW, so it takes very little to cause fluctuations. If you simply turn the kettle on, you'll see a voltage drop. You switch on the kettle, the dishwasher, the laundry machine and the oven all together, and pretty sure you have a blackout, as I said earlier. Well this part at least is avoidable.
Hugh Robjohns wrote:If it's a switched mode (universal) power supply -- and most modern keyboards are -- it will be able to cope with pretty wide mains voltage variations quite happily.
The only keyboard for which I'd invest money for such a thing is a newly acquired Nord Stage 3 of mine, very expensive and so worth the paranoia. :D I am not sure which kind of power supply it uses to be honest, as electricity in general isn't really my area of expertise.
Hugh Robjohns wrote:And the memories are very unlikely to be damaged due to power loss. You might, possibly, lose data if you happened to be writing a preset to memory when the power went out, but it's pretty unlikely... and you'd have a backup saved on your computer anyway wouldn't you? :-)
Yes, as far as data backup itself is concerned, I don't worry at all. My concern was rather upsetting the flash drive itself. I too was convinced the worst thing that could happen is mere data loss, but then I found this paper (the only one I could find on the topic):https://wiki.phytec.com/download/attach ... s%20intact
I am not sure how to map this onto standard flash drives (the ones we find in PCs and in this case keyboards)... They make it sound more serious that I thought.
Hugh Robjohns wrote:Uninterruptible Power Supplies are great. I have one looking after my computer, network and NAS storage, and it's there purely so I have some time to save work and shut things down sensibly, as well as maintain the wi-fi connection for as long as possible if there's a power outage. I wouldn't be without it as it's more than paid for itself over the years...
But a decent sine-wave UPS is expensive -- as you've discovered -- and there's the ongoing cost of replacing the batteries every 5-8 years.
I might want one on the keyboard if I was doing a festival gig outdoors, but not at home.
You definitely have a point and I myself don't know what to think. For one thing, I'd think such an expensive keyboard is worth its protection means; for another thing, spending that much for a device that needs its own care (and money), and for which it is debatable whether its function really acts as "protection" capability in respect to an electronic keyboard... well, hence my doubts.
Also, spending almost the same price every time I have to replace its battery, again not so tempting (you say 5-8 years... the reviews I have read say 2-3 years on average... even less tempting).