RJH_MUSIC wrote:I thought I did but I do not recognize the s video output so maybe mine was different. I will have to try it when they are back in stock.Thanks.
RJ
You must load an SMPS with at least 20% of the rated load or it will modulate the output at a low frequency. For smaller SMPS this frequently manifests itself as a whistle in the 1-3kHz range. For larger supplies, it can create massive noise at a wide range of frequencies. And note that at some point you can't just add a load resistor because it will need to be huge. So you need to pick an SMPS that supplies the right current to begin with. It should be selected for at 80% of load. SMPS work better when loaded. Even to 100%.
RJH_MUSIC wrote:Interesting news. I am still waiting for the +5 VDC supply i purchased with sense to be delivered. SO let me describe what happened when i built up a power supply based on Ralph's post and instructions for supplies. Maybe my problem was not related but I assume it was due to the +5 not having sense and being way underpowered. I posted a picture of the power supply I built early in this thread. I took a 1 RU case and mounted the three power supplies recommended by Ralph plus one more, a +48 VDC for phantom power. when I turned it on, everything came alive so it was very promising. I then connected the Data cable and botted into 5.1 OS. The first thing I noticed was that in the software, the faders were jumping all over the place but the hardware faders did not move. I then tried to turn pan-pots and got no reaction but the mixer screen in the GUI should pots jumping around as well.
The only thing I added to Ralphs setup was a fuse board inside the case with 4 fuses, one for each supply rated at 6-8 amps, I connected the 2 purple wires to to -12 and the 2 yellow wires to +12 on the Meanwell. I connected the 4 orange and 1 orange/white (sense) to the +5 terminal and the 4 black and 1 Black /white to the -5 terminals of that supply. I originally thought my problem came from the +/- 15V supply but could not have been because that is the +/-16V which is analog audio, not lights and fader motors. But i had not yet built up the vellemen kit. Is it possible I had a loose connection somewhere that caused the problems I had? SO later, i looked at the original Aztec LPS-152 and noted that it's output is 22 amps, as where the meanwell only outputs 16 amps. And I thought that was the problem, which is why I purchased the 30 amp SMPS power supply with sense.
So are you thinking my problem is unrelated?
RJ
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