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physya

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  1. Well, I am a simple-minded technical person. I don't know what "overcharging" means. The chargers, in principle, should measure charging current and adjust voltage accordingly. Perhaps, I need to get my MD to the lab and measure these. Anyway, battery university does provide some insight: ----------------------- Charging nickel-metal-hydride Nickel-metal-hydride chargers require more complex electronics than nickel-cadmium systems. To begin with, nickel-metal-hydride produces a very small voltage drop at full charge and the NDV is almost non-existent at charge rates below 0.5C and elevated temperatures. Aging and degenerating cell match diminish the already minute voltage delta further. This makes full charge detection difficult. A nickel-metal-hydride charger must respond to a voltage drop of 8-16mV per cell. Making the charger too sensitive may terminate the fast charge halfway through the charge due to voltage fluctuations and electrical noise. Most of today's nickel-metal-hydride chargers use a combination of NDV, rate-of-temperature-increase (dT/dt), temperature sensing and timeout timers. The charger utilizes whatever comes first to terminate the fast-charge. Lower-priced chargers may not apply a fully saturated charge. Some will indicate full-charge immediately after a voltage or temperature peak is reached. These chargers are commonly sold on the merit of short charge time and moderate price. ----------------------- so, perhaps the batteries are just undercharged after the first run...
  2. I agree witht The Low Volta. I was balancing between a 60 Gb jukebox and something else. The jukebox looks as a good choice, but no active sports allowed. (and I had two creative nomad jukeboxes before - in both the hard drive died). I think we jump to conclusions too soon. 1 Gb discs are sweet. I have 20 and I am ordering more (the internal counter on RH910 is 64 discs, so that's the goal). I am reading increasingly positive reviews of the new gen. MD As for proprietary formats - I don't really care as long as it plays by my MD unit. (... and I keep all my music in WMA/Mp3 on a 300 Gb HD anyways....)
  3. Has anyone noticed that after you charge a battery and press "charge" again (I use MZ-RH910), it starts charging again - for about 1/2 hour. The question is what is being charged (if the battery is already full)?
  4. I got a few and I noticed that these are NH-14WM(A), not NH-14WM This, probably, accounts for 1350 mAh, not 1400 Maybe these are older models?
  5. History is science with unpredictable past...
  6. http://www.abtelectronics.com/scripts/site...t.php3?id=17375 free shipping makes it a good deal...
  7. There are 10 kinds of people that understand binary code - those who do and those who don't.
  8. Thanks! Exactly what I wanted to hear. I just wish I knew detailed functionality of these remotes with RH910 (US). A question about the fact that remote is not included with the US Rh910. Is it just a friendly omission by Sony or there is something fundamentally different between US and other models? (except the known differences in the output power and equalizer, of course)?
  9. I actually still have all these very questions. Did you find the answers for MZ-RH910 (US) - not other "similar" units??
  10. Yes, I have read that thread, but is does NOT mention MZ-RH910 (US)! (or I am blind and did not find it). It does mention MZ-N910, though...
  11. I've read several threads, but still not sure. What remotes will work with the US version of MZ-RH910?
  12. Of course, but we're talking about efficient codecs. Yes, but they are not supported by MDs (as far as I know). Two - pass WMA 9.1 certainly does.
  13. Did you like it? I really liked "Principles of moments" and "Pictures at eleven", - is this one anywhere close? (I know it suppose to be fusion - kinda african drums etc., by I mean is it good melody - wise?)
  14. From the formal point of view, it does not matter how you do it, 64 kbps will always have LESS useful information compared to the hifher bitrates. So it IS worse. The question is - will you notice it? From my experiments, I think ATRAC3plus at 64 kbps is best if you compare it to 64 kbps WMA or MP3 or even MP3PRO. However, properly encoded MP3 (or better WMA) at 128 kbps will sound better. On the other hand, it really depends on your listening environment. I have recently done exactly what you described - a kinda "best of" of some stuff and I am listening it using an FM transmitted in a car. There, I found that 64 ATRAC give same quality as 128 MP3 (or even 256 kbps ATRAC) - simply because all other noises in the car dominate.
  15. I actually referred to another discussion where A=mp3, B=ATRAC132, C=ATRAC64. Our discussion of these A,B,C has prompted The Low Volta to initiate this topic.
  16. That's why we have this topic it in this forum. The taste is subjective - just like music appreciation. I am sure for some T-Rexes those dino-chicks were yammy, but would you want an omlette made of that egg?
  17. I was going to write a longer reply, but I just found this quite accessible text: Time travel read it and see if you have more questions...
  18. That's why Einstein is great. You can (formally) travel twice as fast with respect to the Earth moving in the other direction with the speed of light, but you won't be able to get or pass any information to or from it. So, it won't exist for you. However, when you start from the Earth, you can only reach the speed of light and then time will stand still, your size will be zero and your mass will be infinite... so you won't be able to accelerate anymore... Having said all that, contemporary physics has suggested elementary particles called tachions. They do move with speeds above the speed of light and you are absolutely right - they are moving backwards in time. Indeed, nobody can detect them, but they can account for certain physical observable effects. Nowadays physics is much more fantastic than many may think. For example, it does allow for time travel... (to be continued if anybody is interested)
  19. So try that book about Schroedinger Cat I mentioned. It requires no math, but you will see if you want to study it deeper. Also, look through "Scientific American" - sometimes they have really accessible, but correct articles. Another thing is that this year is the official year of Physics, because 100 years ago Einstein has published his special relativity theory. So, there is a lot of stuff around. Look at the American Physical Society at www.aps.org or UK - based Institute of Physics (www.iop.org).
  20. Well, that's because rhetoric question requires rhetoric answer. Scientifically neither came first. I think they just found a dinosour with eggs inside (her).
  21. Here is another one from physics for your car. There is so called Doppler effect - for any wave (sound or light) frequency increases (wavelength decreases) when you move towards the sourse and decreases otherwise. So, if you speed up on your quantum car and pass the red light, you may argue that you saw green! (because green has higher frequency than red). Moreover, it would be real scientific truth... (of course the speed has to be comparable to the speed of light, so you fine for speeding will greatly exceed a fine for not stopping on red )
  22. oops, - my mistake. I mixed up recording in a Hi-MD format and playing an older disc using a Hi-MD player. I indeed used hi-md recording. just delete my posts!
  23. I am not sure what you mean. It works fine for me. The image shows a track playing off the MZ-RH910 via USB. The track is NOT in the SS library. It also shows real-time recording in a wave editor.
  24. I am not sure what you mean. It works fine for me. The image shows a a track playing off the MZ-RH910 via USB. The track is NOT in the SS library. It also shows real-time recording in a wave editor.
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