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.
.
Glad to hear from you Steph,
The project seems on its way to success. To provide air through the DEQ or DCX, one can always detach the lateral "wings" and even get a nicer design.
The project seems on its way to success. To provide air through the DEQ or DCX, one can always detach the lateral "wings" and even get a nicer design.
kepa1 said:
In fact, mine is with "wood border". ;-)
The new psu is inside. New holes at the center of the top box, and somes under the box too. I ordered 2 new prototypes. I'll will be looking for a DCX beta tester if warriors available. ;-)
.
How is your unit working sound wise,any difference?
I would love to be a beta tester but too much other stuff to do right now,I´ll wait until the sharp verison is out.
I would love to be a beta tester but too much other stuff to do right now,I´ll wait until the sharp verison is out.
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).
Ryssen said:
Deleted. ;-) Some person say, no need of decoupling caps with Schotty diodes, and as I dont have more space left...
The holes under the box is may be not a good idea. Hot air coming from others equipments under the DEQ will go inside. On the side will be better.
;-)
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...
Salut Steph,
Off course I'll take one PCB. I'll try to get small sized 6 and 15v transformers by myself.
Thank you again
Off course I'll take one PCB. I'll try to get small sized 6 and 15v transformers by myself.
Thank you again
kepa1 said:
6v is ok for the digital part but I do not tried with the 7805 analog part (aka 9v). I hope this will works or we will need to wait for the dedicated transformer.
J'ai une proto qui fonctionne. Si tu es sur Paris, on pourrait l'essayer dans ton DCX.
.
Salut,
Ecoute ça tombe bien je suis libre quasiment tout le week end qui vient, je veux bien servir de cobaye!
Je viendrai avec mes deux DCX (dont l'un planté à cause de l'horloge).
Dis moi si ca te va...
A+
Ecoute ça tombe bien je suis libre quasiment tout le week end qui vient, je veux bien servir de cobaye!
Je viendrai avec mes deux DCX (dont l'un planté à cause de l'horloge).
Dis moi si ca te va...
A+