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The prototype was tested running at over 800 mA output using 3300 mfd filter capacitors and a 36 volt transformer.
Another factor limiting the maximum current that can be drawn from the unit is the size of the heatsink. With 600 mA being drawn, each regulator can easily be dissipating 6 watts, and will require a heatsink with a rating of 12°C/W or better to operate in an ambient of 25°C. As heat in an enclosed space may well be greater than this, I'd recommend going for the best heatsink of the correct profile you can get. Hobby shops in Australia have them available at 8.5°C/W (50 mm) and 11°C/W (40 mm), depending on the shop, though I have used 63 mm heatsinks I salvaged from old switch-mode power supplies. The profile used is simply listed as PCB mount
== Construction ==
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