AR2 said:
Hi!
Back from my vacations. I restart the project.
For the question: I can place the regulators at the edge but space for the heat sink will be difficult to find in the box, specialy with the DCX.
I'm waiting for some new regulator samples to optimize the 3.3v circuit (some new circuits from Linear). I already modified the PCB to have a better cooling. I moved the big caps, moved the rectifier to the edge, moved the 2 heat sink as far as possible and done holes in the PCB under the heat sink.
Zero Cool said:
The PSU from Selectronic is only for the DCX and only "cleanup" the digital 5v.
I'll send the file to produce the final PCB end of week.
New caps, new bridge for digital, new heatsink, better ground design and holes for vent. Option to place an 25mm PAPS at bottom of the 2 heatsinks.
.
stef1777 said:
The PSU from Selectronic is only for the DCX and only "cleanup" the digital 5v.
I'll send the file to produce the final PCB end of week.
New caps, new bridge for digital, new heatsink, better ground design and holes for vent. Option to place an 25mm PAPS at bottom of the 2 heatsinks.
.
Stef, I would be interested in your power supply kit. Did you already mention a price? Can you keep me updated?
BTW, finally Ward and I got most of the parts and PCB's for the DCX2496 Active Level Control kit together. Ward will be able to start shipping kits as of 15 September or so.
I have put up the info on how to order the kit on my web site.
Jan Didden
janneman said:
No kit yet. The project is not over. I'm waiting for the second prototype to validate heat dissipation and long time working. I will look for an experimented user to build and try the PSU inside an DCX.
Later, I plan to produce board + transfo and sale them as a kit. Group buy or complete kit with componnent is too complicated for me to manage.
My first prototype is working and inside the box. Seems to work fine. Not easy to heard a difference but on the scope numbers seems better.
Stef...
Hi Folks!
The PSU is over. The last ajustement are done. I'm now ready to order a first batch PCB and transformer. I solved the temperature problems with the last prototype PCB and new rectifier bridge for the digital parts. I also changed some capacitors values.
I've enclosed the last schematics.
The temperatures are these (with closed box and holes at the top and under the PSU):
Diodes: 35/45°C
Small heatsink: 40/45°C
Large heatsink : 55/65°C
DSP : 40/45°C
PSU capacitors: 30/35°C.
If we place a PAPS 255M 5v fan in the box at top of the heatsink, we have an internal temperature around 30/35°C maximum (room = 24°C).
The PSU is over. The last ajustement are done. I'm now ready to order a first batch PCB and transformer. I solved the temperature problems with the last prototype PCB and new rectifier bridge for the digital parts. I also changed some capacitors values.
I've enclosed the last schematics.
The temperatures are these (with closed box and holes at the top and under the PSU):
Diodes: 35/45°C
Small heatsink: 40/45°C
Large heatsink : 55/65°C
DSP : 40/45°C
PSU capacitors: 30/35°C.
If we place a PAPS 255M 5v fan in the box at top of the heatsink, we have an internal temperature around 30/35°C maximum (room = 24°C).
If someone want to test it with an DCX2496. I'll have 1 more PCB available in 10 days. Unfortunaly, I don't have a spare transformer but I tried today with a 2 x 15v and 2 x 6v regular transformer and this work (thanks to the new Schotty diode). This will permit a try without the custom made transformer.
I now have a better idea of the prices:
Transformer (230v only) = 40€
PCB (double side, gold plated, thick) = 12€
But I need to order 64 units to the factory.
Need to find 64 people. ;-)
.
I now have a better idea of the prices:
Transformer (230v only) = 40€
PCB (double side, gold plated, thick) = 12€
But I need to order 64 units to the factory.
Need to find 64 people. ;-)
.
stef1777 said:
Steff,
As said, I am willing to do a beta-test. It would be a nice complement to my output replacement board with the 6-channel level control.
It would be up to you if you want me to report on it on my website and to the yahoo DCX group, or only privately to you.
I have a transformer for this, so that would be no problem.
Jan Didden
janneman said:
Hi Jan!
No problem. We already talk of this. I've have a spare PCB in 10 days. I'll send it to you. Give me your postal address privately.
You can comment here on the forum. That's the best. If you have a good scope and FFT, I'll be interested to have some benchs. My scope is close to be dead. I'll looking for a new one. We can may be optimize some of the components (caps).
Stef...
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