Yes, although some mains sockets have a switch built in. This may save you a bit of effort (depends on whether you want the power switch on the front of the cabinet, or not).
You should add a fuse also. Again, some sockets have these built in.
The wire looks ideal. Might get me some of that.
I will post your DAC today.
You should add a fuse also. Again, some sockets have these built in.
The wire looks ideal. Might get me some of that.
I will post your DAC today.
Thanks, I ordered everything I would possibly need (I hope) except mains switch and spdif rca's. I don't know how I am going to do that yet. I think I'll get the cd 723 inside my budget so everything should go as I planned.
Hi Jacub
The DAC is in the post. I don't know how long it will take to get to you. It went by air mail.
I did not put the power supply in with it, as I did not want them banging together in transit, so you will need a 12v dc supply for it. A wall adapter of the right size will do for a while.
The thicker red leads are the dc power input. The wire with the black stripe is negative.
The orange, yellow, and white wires are the line level outputs. The white is ground/return.
The RCA socket is the digital input. If you get this working nicely, then I suggest that you remove the scoket and wire direct to the board, like I have done with the power and line out.
I don't know why this did not make a nice sound for me. I only used the optical input. Maybe my power supply was bad.
I think that I have a circuit diagram for it somwhere. If you need it, let me know.
Good luck.
The DAC is in the post. I don't know how long it will take to get to you. It went by air mail.
I did not put the power supply in with it, as I did not want them banging together in transit, so you will need a 12v dc supply for it. A wall adapter of the right size will do for a while.
The thicker red leads are the dc power input. The wire with the black stripe is negative.
The orange, yellow, and white wires are the line level outputs. The white is ground/return.
The RCA socket is the digital input. If you get this working nicely, then I suggest that you remove the scoket and wire direct to the board, like I have done with the power and line out.
I don't know why this did not make a nice sound for me. I only used the optical input. Maybe my power supply was bad.
I think that I have a circuit diagram for it somwhere. If you need it, let me know.
Good luck.
I think that this was the one:
Mini SPDIF+OPTICAL DAC Board --PCM1793+DIR9001+OPA2134 on eBay (end time 19-Dec-10 15:48:54 GMT)
You can get the schematic off this ebay page.
Mini SPDIF+OPTICAL DAC Board --PCM1793+DIR9001+OPA2134 on eBay (end time 19-Dec-10 15:48:54 GMT)
You can get the schematic off this ebay page.
Thank you, really. I think I will check for 12V adapter somewhere or make a little board myself, that's not a big deal. I've got everything, even the CD player from ebay. I hope I will start to receive parts in two weeks from now on so I can figure out how big case I need to make.
Wow the DAC just arrived I hooked it up, I had few issues with interference but figured it out and it works like a charm, It's great! It made a significant difference in the upper frequencies immediately hearable, It has more bass and the music is very clear. Even in lower quality recordings. It works with 96kHz 24bit on optical input, I need to get coaxial cable and the psu now.. I'm powering it directly from my computers' PSU now. THANKS! you saved me.
Ugh I have a problem with the dac, I think that it is the psu I need to find a new one. The second diode blinks and it makes a pop sound. It's good for a few seconds then it starts to do every second and speeds up till nothing than popping is audible. I'll try to get the psu and then update.
BTW cd player arrived too
BTW cd player arrived too
Hi Jakub
Congratulations. It looks like you are making good progress.
How did you mend the dac interference?
Have you changed anything since it was working well this morning?
Congratulations. It looks like you are making good progress.
How did you mend the dac interference?
Have you changed anything since it was working well this morning?
Not anything that I know... I've got a large amount of hum when connecting directly to amplifier input by the cables you soldered. Like when you touch 3.5mm jack connected to amplifier. I think it has something to do with grounding because when I connect another pair of rca's from the same device directly to the amp it disappears.
I found 12VDC converter but it's only rated at 1 amp and it doesn't work, just light's up one diode on the DAC. Do you have a manual or schematics for it?
I found 12VDC converter but it's only rated at 1 amp and it doesn't work, just light's up one diode on the DAC. Do you have a manual or schematics for it?
I have remembered what the problem was with the dac, when I used it. It sounded great at low listening levels, but as soon as I turned the volume up there was a lot of interference that sounded like (but couldn't be) feedback. Is this your problem? Maybe it was an earthing issue, but I don't know. I did not have a lot of time to sort it out, so I gave up.
The digital line level section of this forum would be a better place to ask for help on this aspect.
The digital line level section of this forum would be a better place to ask for help on this aspect.
Ok so I found few issues in your connection after checking the schematic. I need to check that more in depth. I think it's more than just bad grounding, It uses positive/negative supply voltage and the r and l out are wrong too I think. I'll check that tomorrow and update.
Oh after checking the schematic more in depth I noticed that you did everything right I'm sorry. I found out it uses lm1875t as a virtual ground after few minutes of looking at that mess. But I found bigger issue I don´t know if I can fix. Both DIR9001 and PCM1793 (DA converter chips) have two short circuits. It causes DIR9001 to have the feedback you talked about (That one converts frequencies up to 96kHz) and the PCM1793 (192kHz) is completely unusable, it just beeps and causes lm1875t (virtual ground) to overheat because the Vcc pins are short circuited, that caused the popping I heard after few seconds. I don't know if it's blown or not.The bad thing is that I don't have good enough iron to fix it so everything I could try is to cut it out. I'll update later, I hope.
This is dissapointing. It sounds like it was broken from new. Too long ago now to do anything about a new one.
FIXED! In the end it was the mix between connected wrong and one short circuit. The other three were OK. You have connected + and - to the feedback and ground instead of output and ground that's why you heard it when you turned up the volume.. The actual output is like 10 times louder and without the hum. It now works like a charm but I still need the power supply :/
Well done.
If you struggle to find a 12vdc supply, let me know. I would send you one, as I have a few spares here. The postage was cheap last time, but I did not want to put the smps in the same parcel as the dac, as they would bang together.
If you struggle to find a 12vdc supply, let me know. I would send you one, as I have a few spares here. The postage was cheap last time, but I did not want to put the smps in the same parcel as the dac, as they would bang together.
OK I want to say that I made a leap forward. In the last two weeks I've got T3's with all the other stuff. I had few issues with grounding. I still need to ground the pot somehow (I have like four cables connected directly to ground from RCA's, inputs and connectors, I need to setup another two for the pot intput and output, I really don't know why but I have hell of a lot of interference everywhere!) I need to mess with this more. Every day I try new method and everyday it's a little better. I still need to design a box for all pieces so there is a lot of work ahead. I also made some progress with my speakers.. I just need to put them all together and paint them. I hope I'll do it till the end of month. Unfortunately I must do without the DAC for a while because I have some issues with it and the AMP and speakers are higher priority for me.
Hi Jacub. Happy New Year.
I have sent you a small 12v Power supply. The shipping was only 2EUR. Put the money in a charity box if you wish.
Grounding: I am no expert, but on mine, I joined all grounds together, and connected it to Earth. It sounded horrible. Then I did not ground anything, and used line level ground as signal return only. It was all good. I think that this is called floating ground, but I may be wrong.
I am sorry to hear that the DAC is not working well.
How about some photos of your progress?
I have sent you a small 12v Power supply. The shipping was only 2EUR. Put the money in a charity box if you wish.
Grounding: I am no expert, but on mine, I joined all grounds together, and connected it to Earth. It sounded horrible. Then I did not ground anything, and used line level ground as signal return only. It was all good. I think that this is called floating ground, but I may be wrong.
I am sorry to hear that the DAC is not working well.
How about some photos of your progress?
Happy new year to you too.
Thanks, I will.
What did you use as earth? Can you point to part of my image where would you connect all the cables? ( the dark blue cables sticking from yellowgreen interconnect are grounds of the amp board. ) It still needs some tunning I get a little hum when I connect to the computer. I'm doing a burn in test right now. It's playing for five hours now and it's OK no fires 🙂 Here are some pictures.
(The trafo is Huge BTW 😀 I'll have a hard time making case for this Lol)
Thanks, I will.
What did you use as earth? Can you point to part of my image where would you connect all the cables? ( the dark blue cables sticking from yellowgreen interconnect are grounds of the amp board. ) It still needs some tunning I get a little hum when I connect to the computer. I'm doing a burn in test right now. It's playing for five hours now and it's OK no fires 🙂 Here are some pictures.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
(The trafo is Huge BTW 😀 I'll have a hard time making case for this Lol)
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