Started by ||C|-|E||, 02:40, 17 March 16
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Quote from: ||C|-|E|| on 02:16, 18 March 16Thank you! If I buy it will be a good unit from RS components, those are quite expensive but nice. However, if you have a particular suggestion I am more than happy to follow it and buy that one
Quote from: 1024MAK on 01:57, 18 March 16Slightly off-topic, but relevant if you are thinking of buying, or have bought an inexpensive PSU. On another forum, a user has been buying "modern" switch mode power supplies (SMPSU) designed with both +5V and +12V outputs. He wanted them to power dual 3.5" floppy drives.He has bought at least three, all from different suppliers. Two via eBay and one from an online shop in Germany. The prices ranged from a few pounds to I think £22 incl. shipping for the SMPSU from Germany.He has opened the cases of all of them to see the quality of the circuit board and the components used. One of the cheap units did not have sufficient clearance between the PCB copper tracks of the primary (mains) circuit and the secondary (low voltage output circuitry) as I would have liked (this is a possible safety issue). The other two were okay in this respect.But all three had no interference suppression components (inductor/capacitor filters) on the primary (mains) side of the circuit. And the filtering on the secondary DC outputs was basic (just a single filter capacitor per output, instead of the better capacitor/inductor/capacitor arrangement). Further, the cheaper units appeared to have only a basic control circuit (a discrete transistor design).
Quote from: ||C|-|E|| on 13:47, 19 March 16I was checking and there are some apparently decent linear power supplies around that I could probably use. For example, this one looks very fine:Hifi linear DC 5V output power 25W USB/amp/DAC/external power supply | eBayWhat do you think of it or something similar?
Quote from: ||C|-|E|| on 23:53, 20 March 16Thank you! One thing I really like about that linear psu is that I know them much much better than the switching ones. I have made and repaired a few of those, always for audio amplifiers, and it is always nice to use something that you can actually understand. Besides, it will probably not interfere with the screen and it looks very nice. It is regulated, yes, but I do not know the details. I will try to find more info about it!Edit: I found some pictures. It seems a very simple power supply, with a linear voltage regulator. I use these all the time It is not earthed, though. Less noise
Quote from: ||C|-|E|| on 11:53, 21 March 16.@Chinnyhill10, thank you for your suggestion as well! That one is definitely a nice switching PSU, the only thing that prevents me from taking it is the switching nature of the device, something that I would really like to avoid
Quote from: ||C|-|E|| on 03:07, 06 April 16the computer works very well, it does not interfere with the CRT anymore and with 5A it has enough juice for everything I can throw at it.
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