Senior Member
Location: Down South
Posts: 2,413
I'm Neal.
The forum isn’t very DIY orientated so you’re not going to get many replies! TBH the 7510 is somewhat old now, Stan has moved the game on a lot further since the 7510 was released, I suspect you would be better off applying all your good work to one of Stans newer models where the sonic gains would be greater for the amount of effort you are putting in.....just MHO....
Last edited by NRG; 11-03-2019 at 20:55.
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Only a Sith deals in absolutes.
Member
Location: France
Posts: 42
I'm Francisco.
Originally Posted by NRG
Yes NRG, you're absolutely right! I am making this because I bought this dac a few weeks ago for 50 euros and I liked it.
I have other dacs, diy ladder dacs, soekris well implemented is very very good. Soon I will buy a Seg Dac, I am curious and I know it is better.
This is fun for me and I am also learning.
That said, I soldered again the fancy regs and fed it with the external psu, the one with the big transformer, so it is feeding both regs.
The sound is not so good. Not at all! Is that because I am feding the10volt rail with a 12V reg? May be, but I don't know, not sure.
I think that feeding the rails directly is the way to go, and no "fancy" regs. At least in this context.
Tonight or tomorrow I will re install the set like it looks in the last photos.
Nevertheless, I will compare that "analogue" psu with the S-Reg from RJM audio. This reg is wonderful.
i am disappointed with the "fancy" regs and surprised with my old salas regulator.
Member
Location: France
Posts: 42
I'm Francisco.
Hello,
I made a mistake, by distraction. I connected the 5Volt psu in the wrong way.
Now I have no sound in the left channel.
The transistors have been replaced, but the problem remains.
So my conclusion is what I was afraid of : I must change the dac chip.
Before to do it I woud like to have an opinion about installing the Wolfson's WM8716.
Is it realy better? If I do it, do I have to make other mods?
It is time to finish this project, but I have no choice, the dac must be replaced, unless someone tells me that the problem is elsewhere. But where? It is not a transistor, and all the remaining parts are caps and resistors. And the CS8414. Please help!!
Thank you!
Super Moderator
Location: W Lothian
Posts: 99,005
I'm Grant.
certainly sounds like the chip. shame but if chips are available then at least all is not lost. not sure if finding a different chip is wise.
Regards,
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Member
Location: France
Posts: 42
I'm Francisco.
Hi Grant,
If nobody tells me in the next few days that I can solder the Wolfson without making extra mods, I will buy one BB1716. They are not so difficult to find.
5 euros plus shipping fees. I can still afford it...!
Regards,
Francisco
Member
Location: Bishops Stortford
Posts: 95
I'm Peter.
Hi Francisco,
did you get your 7510 finished OK - how does it sound now ?
Upgrade to Wolfson WM8716 DAC chip - this is seen as a small improvement - it is also something I want to do with my 7510 :-)
The Beresford DAC upgrade which replaces the Burr Brown PCM1716 DAC chip with the pin-compatible Wolfson WM8716 DAC chip.
The work involved is the same as for the 7520 with the addition of 2 wires from pin-16 of the new DAC chip to decoupling capacitors
Op-amp upgrade - in addition to upgrading to the Wolfson WM8716 DAC chip you may want to upgrade the dual op-amp in the 7510
with an LM4562 dual op-amp. This upgrade should also include the addition of a 0.1uF decoupling capacitor.
all the best
Peter
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