Dedicated PSU for DEQ/DCX2496

stef1777 said:


Hi Ryssen!

Is the Chemicon an 4700uF 10v or more? If yes, let me have the ref. I'll look for the spec and will add it on the site as "possible replacement parts".

New "vent holes" pictures here: http://www.awdiy.com/index.php?page=vents-and-holes

deq_lumiere6.jpg


This new method is more difficult to do but look very nice and vent is better. After, 2 hours nothing inside is more hot than 49°C (on the DEQ, will be less on DCX).


For 110v guys: what do you think of a "group buy" for the toroid? I can create an entry in the shop, you pass an order (but don't pay). I wait until end of january, count the orders, ask for the price, and order the toroids if ok. Add 4 or 5 weeks to get them. I' still waiting for a quotation but the minimum order is 20 units.

We can also create a "group buy" entry in the forum, but as I use my company to process all these stuff, I'm afraid to be classified as "commercial sales". What do you think?

But the best, as shipping and Euro are very high, will be that someone organize a group buy direct from USA? You don't have toroid company in USA for small quantities?

Stephane

I would be interested in one 110v toroid.

Thanks Jerry
 
goat671 said:
stef1777
On the 110v toroid
I could look into finding a USA supplier do you have the design specs that I could use to get quotes.

The continuous currents are:

1 x 15v 100mA
1 x 15v 100mA
1 x 7v 400mA
1 x 7v 1000mA

Diameter: 80mm (stay around this size if you want to fit the toroid inside the switched mode psu metal box).
Height: 30mm max (for the toroid)

The best is to multiply currents by 1.8 to manage lost and have a current margin.

The 220v dedicated toroid is an 2x15v and 2x7v 33VA. I asked the supplier to build max VA according to the toroid maximum size. Give him the complete schematics of the PSU. All voltages and DC currents are show. It will be better for him to calculate right values according to max size.
 
The 220V dedicated toroid is sold out.

I need to pass a new order but as it's expensive, let me know if you plan to order a transformer soon. I'll adjust the order according to this. Count 1 month to have them. The new version will have 30cm cable length.

The miniVreg pcb are also sold out but I will have a new batch in 10 days. People seems to like the 10-Pack... 😉

.
 
Steph, this a success for sure!

I finally went for MBR745 diodes as you advised. Before I plug the thing I have still another question. What's the best fuse for the primary windings, 1A or 150mA (written on the transformer)?

Alain
 
kepa1 said:
What's the best fuse for the primary windings, 1A or 150mA (written on the transformer)?

I staid with the original 1A/250V temporized fuse. You can also place a rounded ferrite on the 220v wires and a 330nF X2 capacitor.

I received another picture of a modified DCX2496 with the DEQ/DCX PSU, the Linear Audio input/output board, a passive input using transformers, 2 Audiocom Super-Reg2, and a TentLabs clock. Need more space for another mod!!! A Behringer engineers nightmare. :whazzat:

An externally hosted image should be here but it was not working when we last tested it.
 
goat671 said:
Stef
Could you see what the price would be to get a dual primary model of the toroid, that way it would support both 110v and 220v


Hi!

I got the quote from the suppliers.

2x15v
2x7v
33VA
2X120V 50/60HZ
wires length: 30cm

33€ (with shipping box and fixation kit + shipping)

Same price as 240v version as same copper weight. One month to have them.

Stef...
 
OK guys, I think we are mixing threads and subjects here and it confuses everyone.

PSU mod will be beneficial in digital and analog. I particularly like what Stephane did for digital portion in his linear supply. It has much less of a noise than switching supply so that way you will benefit even if you are using digital signal.

Next - there is no digital input mod for DEQ2496. There is input mod for DCX2496. That mod is done by Frank Oettle and you could read about that in Behringer DCX2496 thread. DCX uses troublesom CS8420 input receiver, and that is replaced with new chip, clock and AD upsampler. That is not the case with DEQ2496! This unit uses AKM chip that is quite fine.

You will benefit in DEQ by upgrading the clock circuit as well, even if you are using SRC. Clock circuit matters the most in the unit where DA conversion is done, in your case that is DEQ2496. If you are using SRC do not do any upsampling, or conversion there but let that be done in DEQ. That way you will avoid jitter that is produced twice - in SRC and DEQ. I am assuming you are using SRC in order to plug several digital units, so if that is the case just use it as distributor and do not do any additional operations there, for the best sound.

Hope this helps.
AR2
 
thanks ar2 for the info.

i use the src after the deq for d/a conversion.

it sounds better this way since the src is heavily modified and it already uses a linear psu.

the deq is used just for room correction and the psu question comes from the huge i received when i replaced the trafo with a toroid one.
 
AR2 said:

PSU mod will be beneficial in digital and analog. I particularly like what Stephane did for digital portion in his linear supply. It has much less of a noise than switching supply so that way you will benefit even if you are using digital signal.

I'll be more conservative.

For a DEQ used in full digital mode, I'm not sure that you will heard a difference (a scope will) using my linear psu vs switched psu BUT:

- the switched psu experience aging problems (after 2 years, specs are far from original specs)
- noise, reg and speed of my linear psu are a step better than original. This will have an action on the digital circuits too, not only on analog circuits. But I'm not enough skilled in electronic to evaluate in detail the benefits (except may be for clock circuit where I know that noise is important for performance).

If you stay with the switched psu, I recommend at minimum to update the digital capacitors on the dsp board (the ones close to the AKM chips). Use oscon.

You can also add a nice add-on clock but use a good low noise and fast transient psu to power it (or use a add-on clock with an integrated low noise psu and filter).

Stef...