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Unread 01-30-2008, 03:36 PM   #7
|kbn|
Cooling Savant
 
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Join Date: Feb 2004
Location: W. Sussex, UK
Posts: 329
Default Re: Worlds most powerful D5/655 pump

the pcb in the bottom pic can stay, assuming I want to keep Y wiring. To change to delta, I would just cut some of the traces and add solder connections to the correct points. I assume if I were to by a similar RC speed controller as used above it would fit in perfectly.. the only think I dont know is the control side of it.. since I assume it connects to an RC reciver of some kind.

Your correct laing did say it was fixed by smoothing the square wave, however I think this is just later d4 versions..? The d5 has the two pcb's intergrated into one, I think they just compleatly redesigned it. Probably at a higher frequency and the modified sine wave was just a quick fix..

I also notice that with the pcb removed, and case cut down, the D4 could be amost as compact as the DDC.
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