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Old 4th April 2011, 06:26 PM   #11
teamacc is offline teamacc  Netherlands
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Well, lets say you run the board at 24v.
The first psu outputs like 24.1v and the second 24.2v. This means there is a voltage drop of 0.1v between them (this might be autocorrected by the psus, but im not sure about this).

This means, if the wires used to connect psu1 to psu2 have a resistance of 0.1ohm, 1A will flow through them, a short of some kind. This means you lose around 0.1w in the wires.
Imagine what happens if there is a 1v difference between them-you would lose 24w, and the wires would melt.
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Old 4th April 2011, 06:48 PM   #12
MrAmp is offline MrAmp  Germany
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That sounds comprehensibly, but how should I connect the PSUs instead? Thereīs no possibilty to use only one 100W PSU.

Do I have to use a kind of balancer, to avoid overloading of one PSU and secure the equally usage of both PSUs?
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Old 5th April 2011, 01:04 PM   #13
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Default Fan activation issue - also

I had a related issue with the same board - my fan would kick in after about 15 minutes of operation, but would just sort of jitter. I measured the output across the fan pins and the voltage was all over the place (AC) - so it was literally trying to go back and forth at the same time! I can only assume there is a bad solder or component problem somewhere.

I eventually wired the fan permanently across the 5v rails. Its almost inaudible at this point and the heat sink stays at room temperature.

I'm new to this game - so please advise if what I've just done is bad form, not cricket or plain stupid.
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Old 5th April 2011, 04:52 PM   #14
MrAmp is offline MrAmp  Germany
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That sounds exactly like my problem. But Iīll try to get back my money and use the heatpipe cooling.
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Old 6th April 2011, 02:51 PM   #15
MrAmp is offline MrAmp  Germany
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The new cooling system is ready and running very well. I just tested the amp at absolutly weird volume level and the fan (for controling the temperature) did nothing , so Iīd say temperture is not to high.

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P.S. Bending the Heatpipe wasnīt as difficult as I expected. But itīs only 3mm at diameter. Bigger heatpipes arenīt that easy to prepare.
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