endimion on 17 June 2012
| fordy said: A mere "transformer" may not do the job properly. In order to smooth out the wavelength, capacitors are used after full rectification to bridge the power gap between the still fluctuating AC. The slower the frequency of the power input, the more capacitance needed in order to store a charge to effectively bridge the gap between voltage peaks. Usually 50Hz to 60Hz is not a problem, as the capacitors simply do not charge as fully. However, unless the the power design is made for universal applications, using capacitance rated for 60Hz applications in a 50Hz environment can cause fluctuations in voltage. I had the same problem with an NTSC NES, which took 9V AC @ 60Hz whereas my power supply output was 9V AC @ 50Hz. You'll tend to get certain quirks in this instance (failing voltage regulators, some circuits unable to process digital values properly, buzzing of the sound or flickering of the screen. This also does not take into consideration that some NTSC TV sets do not support SECAM conversion, too. |
so what can do a proper job ? or a better one....
