Antoine's system

[Antoine]

Ok, is the rails in your PSU adjustable? It would be nice to have something like 3-12VDC range so it fits many different things.

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Yes, again see: http://devialetchat.com/showthread.php?t...2#pid40242

I know I remembered that you already had mentioned that......do you know if this is possible in all of his supplys to get them adjustable?

Rail 1: 3.3-12V @ 2.9-8A for my 'unknown future application', initially set to 9V
Rail 2: 5-12V @ 2A for the microRendu, initially set to 7V
Rail 3: 3.3-12V @ 2A for the DSpeaker Anti-Mode, initially set to 12V
Rail 4: 3.3-12V @ 2A for the Mutec, initially set to 6.2V

It's best to ask Paul. I believe all can be adjusted over a certain small range but he's customizing my PSU to support these wide ranges using different regulators for the low power rails and modifying the high power regulator module. It also depends on the used transformer.

Do remember he (Paul Hynes Design Ltd.) doesn't do custom build service anymore. I believe he made an exception here since I am buying one of his own PSU's from his own system. I'm not sure what modifications (if any) are possible through Paul Hynes Audio Ltd.


What he wrote about my PSU modifications:

I can modify this power supply to suit your requirements without changing the mains transformer but I would need to change a couple of the regulator modules

The mains transformer has twin secondaries for each rail allowing the use of TO220 dual Schottky diode rectifiers for high current applications. It is possible to use the two secondaries in series and use a bridge rectifier to provide higher voltages, so quite adaptable really.

Rail 1 is always mounted on the main heat sink as this high current regulator can dissipate considerable power when operating. Rail 2 is also mounted on the heat sink and rail 3 and 4 are mounted on the side extrusions.

With this in mind I would be inclined to modify Rail 1 to allow 3v3 to 12v for your application 4. You can then use this rail for 12v at 8A but if you reduce the output voltage the maximum current should be de-rated to allow for the additional heat generated when operating the output device with the larger input to output voltage this will cause. For 5v the max current should be 3.3A and for 3v3 it should be 2.9A. I can modify this module to allow adjustment over this range of voltage.

The high power regulator has a larger die mosfet output device than the low power regulators and this slows the transient response a little due to input capacitance. For this reason I would use the lower power rails for the lower power equipment. All the regulator modules use the same circuit topology and the same ultra low noise error amplifier. Out of interest there is some discussion on the Internet about the latest ultra low noise Texas Instruments regulators. My regulators are typically >4dB quieter than these across the whole operating bandwidth.

In my first email I asked about the voltage range for a SR-3 7V and he answered:

There is a precision adjustment potentiometer on the regulator module that is used for adjusting the power supply output voltage. This is usually sized to give the small range required for adjustment to nominal voltage. However it is possible to size the adjustment range on an SR3-07 from approx 3v5 to 8v5 so this will cover the range you require.
Unfortunately this requires partial disassembly of the power supply. You would need to remove the front panel of the power supply and unscrew the regulator module from the side of the chassis to allow access for adjustment.