Dedicated PSU for DEQ/DCX2496

[Sensation45]

10va is enough for 3.3v 5v 9v. You can cancel the 7805 on the digital card and give 5v directly.

 

[Sensation45]

In fact, I went back to the original right now. The 3.3v still produce heat unless placed after the 5v. I also replaced the bridge with 4 Schottky. I removed the LM3xx heat sink. No need. Later, my plan is to try with an LM3940 for 3.3v, remove the 3.3v heat sink and move the caps too close from the sink (big error from me on this).

After 1 hour, box closed: 65°C for dissipators. 41°C inside the box. Not too bad. My DEQ have some small holes at the top rear. The transformer seems ok. This is a good. Very good quality.

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Since the transformer you use for 3.3v and 5v is 20va, there will be excessive heating, but if you use 10va regulators, there will be no heating.

 

[Sensation45]

You will generate loss and noise with the cable but you could try.



Values not good.

2 x 15v 15VA
2 x 7v 30VA (you can try with 6v but analog 9v will not may be work (LM7805 on the DEQ).

Others larger values will generate too more heat and some caps on the board will not accept this voltage.

Since the transformer you use for 3.3v and 5v is 20va, there will be excessive heating, but if you use 10va regulators, there will be no heating.