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In the Forum: Audio Discussions
In the Thread: It’s mad, mad, mad... electricity.

Post Subject: Moving onPosted by steverino on: 6/4/2014

Yes I think we need to move on from PP and yes the question is how to do it. This should not be a major theoretical nut to crack. Double conversion units are plastered all across the world. In my investigations, the one issue with the commercial double conversion units is the onboard fan. I think the designers are anticipating their units being placed in hostile environment like broom closet or where temperature controls are not good unlike home audio. Thus they put a heavy duty fan onboard to protect from overheating. To drop out the fan one has to design heatsinks and improve efficiency carefully. PS Audio came up with a more efficient class AB design and PP went D. I noted several years ago that I was concerned about PP downsizing the unit because without a fan the box design is critical and can't be fudged. We had the NZ incident of drastic overheating and I bet these other events are related.

I did run across a UK firm selling audio double conversion units apparently without a fan. At this time they seem to sell only 220v for euro countries but of course it could be altered for US. The link follows: http://www.powerinspired.com/ag500-ac-regenerator-500w-p-1723.html.
If this has been noted elsewhere here my apologies.

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