by Steve Walker
31. July 2009 14:26
If you're looking to power the Perseus hardware solely from USB then you've probably come across USBs 500ma power limit and either had the hub shut-down or the Windows error message relating to too much power demanded by the device. Well there may be a way around this. Armed with two semi common items I have found of the 'net it seems that for /M or /P operation you can get away with a laptop and a dual power USB lead.
1000ma USB self powered hub.
The two items in question are dual power USB lead/hub and the 2.1mm USB power adaptor. Armed with both leads you can draw 1000ma from two USB ports and power the Perseus hardware without an external supply which means you could then go - truly portable - to a quiet location and DX for as long as the laptops batteries can supply power to both devices. Even then there are about some 13200ma/h external laptop battery cells that would probably give at least a few hours at 125Khz / recording / DXing. I have the 2nd lead on order and will let you know how it works out.
USB female to 2.1mm + adaptor.
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