Thanks Canvas, I plan to get two LT 3042 to OXO or Mavrica members, buy you are right if the chip is pins compatible with the genuine ldo board, better to swap directly on the pcb :
Well, the LT3042 is not pin compatible. I have to use adapter board for it. No problem with clock board, since it only supports external power. The PCM board pre-soldered an LDO, that's the one I mentioned in previous post.
Poting
Yep I saw that just after as I checked the datasheet ! Thanks again !
Too bad Ian doesn't use it ! I asked him on the other thread : better to putt directly on the circuit the best LDO reg and increase the price despite to put some LDO on standalone pcbs which is not certainly not the best thing to help his sota designs : more soldering, farer from the load...
I don't know if he keeped the old 5 pins reg on the new designs to come
Btw I finally purchased to Alex member two LT 3045 for both the PCM and The clock board ! They are already powered by Mavrica's TS7A regs but with no sensing... and my wires are 7 cm long
! So Soon there will be the both regs ! I was not happy with the A123 cell feeding directly the two boards ! But I will experiment again with the LT3042 ! And the PANASONIC main cap on hi dboards had also its own carachter... (I believe it waste the ESR of the A123 LiPoFe4 cell !)
A litle off topic : how do you like the Adel2020 instead opa861 in buffer position of a DAC ? Ever tried ?
Too bad Ian doesn't use it ! I asked him on the other thread : better to putt directly on the circuit the best LDO reg and increase the price despite to put some LDO on standalone pcbs which is not certainly not the best thing to help his sota designs : more soldering, farer from the load...
I don't know if he keeped the old 5 pins reg on the new designs to come
Btw I finally purchased to Alex member two LT 3045 for both the PCM and The clock board ! They are already powered by Mavrica's TS7A regs but with no sensing... and my wires are 7 cm long
! So Soon there will be the both regs ! I was not happy with the A123 cell feeding directly the two boards ! But I will experiment again with the LT3042 ! And the PANASONIC main cap on hi dboards had also its own carachter... (I believe it waste the ESR of the A123 LiPoFe4 cell !)A litle off topic : how do you like the Adel2020 instead opa861 in buffer position of a DAC ? Ever tried ?
Hi Eldam,
I can see Ian's MC FIFO supports external regulator. I am fine with that. However, it will be great with LT3042's on board. As for ADEL2020, I never try it for buffer. It's a current feedback op amps with mediocre current noise performance. I used to place the VR between OPA861 and buffer chip, so I did not use it for buffer. ADEL2020 is good for conventional I/V stage. I replaced AD811 with it and felt better in sound.
Poting
I can see Ian's MC FIFO supports external regulator. I am fine with that. However, it will be great with LT3042's on board. As for ADEL2020, I never try it for buffer. It's a current feedback op amps with mediocre current noise performance. I used to place the VR between OPA861 and buffer chip, so I did not use it for buffer. ADEL2020 is good for conventional I/V stage. I replaced AD811 with it and felt better in sound.
Poting
Yep I saw that just after as I checked the datasheet ! Thanks again !
Too bad Ian doesn't use it ! I asked him on the other thread : better to putt directly on the circuit the best LDO reg and increase the price despite to put some LDO on standalone pcbs which is not certainly not the best thing to help his sota designs : more soldering, farer from the load...
I don't know if he keeped the old 5 pins reg on the new designs to come
Btw I finally purchased to Alex member two LT 3045 for both the PCM and The clock board ! They are already powered by Mavrica's TS7A regs but with no sensing... and my wires are 7 cm long
A litle off topic : how do you like the Adel2020 instead opa861 in buffer position of a DAC ? Ever tried ?
@ Eldam
The finial version of my MC Clock board has on-board ADM715X ultra-low noise reg for OCXOs. And I'll also supply some ADM715X reg PCB for free at the coming GB. I think a lot of people will like them.
@ canvas
LT3042 might be not enough current to run a pair of OCXO. Especially during warm up. I'm worry about the performance when close to the max output current.
Regards,
Ian
Je dis BRAVO ! I'm not a specialist, far from it, but from what I read and my basic understanding : it's indeed better to have those very good LDO on the main pcb to have the best of their performance instead of an external pcb farer from the load and local ground plane for these sensible clocks and digital stuffs !
Thanks Ian for all the improvments offer to us.
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Completely understandable. It's not a big deal to me. We can replace ADM715X anyway. I hope we will have the new board very soon.
The I2S-PCM board is quite revolutionary. With a good R2R chip & implementation, it beats every DAC I've heard.
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Oh man if you could hear my TDA 1541 with it...
Any experience about adding smd caps on the free areas made for that on the clock boar and the pcm board ? I'm suspicious with such tweaking as I have no scope to check ringings for instance...
Better results with a COG here and there ???
Well replacing ldo... not everybody has a hot air soldering station : quite difficult not to damage everything with a normal 0.5 iron pen !
Any experience about adding smd caps on the free areas made for that on the clock boar and the pcm board ? I'm suspicious with such tweaking as I have no scope to check ringings for instance...
Better results with a COG here and there ???
Well replacing ldo... not everybody has a hot air soldering station : quite difficult not to damage everything with a normal 0.5 iron pen !
Hi Eldam,
I wish I could hear your TDA1541A. I think any R2R DAC driven by Ian's PCM board will behave exceptionally. The key will be the I/V and buffer stage after it.
I added few 47uf and 10uf X7R on clock board. I can hear the difference, but it's hard to say if the performance is improved. I could try the C0G/NP0 though. IMHO, the biggest improvement comes from LT3042. I got cleaner and deeper bass, and the mid & high are warmer and smooth. Previous LDOs were TPS7A4701 and stock LP5900. To desolder the later, hot air is required, since it got thermal pad underneath. You can buy a cheap hot air gun for the rework job.
Poting
I wish I could hear your TDA1541A. I think any R2R DAC driven by Ian's PCM board will behave exceptionally. The key will be the I/V and buffer stage after it.
I added few 47uf and 10uf X7R on clock board. I can hear the difference, but it's hard to say if the performance is improved. I could try the C0G/NP0 though. IMHO, the biggest improvement comes from LT3042. I got cleaner and deeper bass, and the mid & high are warmer and smooth. Previous LDOs were TPS7A4701 and stock LP5900. To desolder the later, hot air is required, since it got thermal pad underneath. You can buy a cheap hot air gun for the rework job.
Poting
too bad for me, I was thinking I just needed to cut one leg of the original ldo to allow the external one to work on the 3.3v out - gnd - inputt vias !Well, it will be just for the clock board so ! Now I have a second dac to finish ad1862 + Andrea Mori clock... (it is waiting for almost 3 years, lol
) !Not sure I can find the equilibrium I have on my AYA II dac with a 1541 S1 and 2 years and half of tweakings ! But who knows, the extra resolution of the AD1862 + the nice sounding clock of ANdrea should be Something as well ! What a hobby : you need one life to make your hifi sounding good and an other one to listen to music !
Hi Ian, I bought a PCM bought a year or so ago and its been in its little bag until this weekend. I had a Wavio running the AYA II dac in i2S mode fine for several weeks now. Next step was to run it in simultaneous mode. The jumper on the DAC board is set to -5V on pin 27 of TDA1541A, volt meter agrees. JOB jumper set. I also tried Half speed jumper, made no difference. All LEDs are are on, Aux, I2S and Pwr. Power supply is set to 5.2V for PCM bd. I had to solder a few ufl plugs on boards, but i tested connectivity as I went. The ufl cables are all new from you, never used.
So here is what I have:
Wavio PCM bd
data -----> SD
BCK -----> WS
BCLK -----> SCK
MCLK -----> MCLK (J4)
PCM BD AYA II
DR -----> Data R
DL -----> Data L
LLLR -----> WS/LE
CLK -----> BCK
All I get is silence. I tried rebooting and changing the media player settings. Its definitely sending to Wavio card.
Any ideas what might be wrong here, or is there anything I can look for?
Thanks.
So here is what I have:
Wavio PCM bd
data -----> SD
BCK -----> WS
BCLK -----> SCK
MCLK -----> MCLK (J4)
PCM BD AYA II
DR -----> Data R
DL -----> Data L
LLLR -----> WS/LE
CLK -----> BCK
All I get is silence. I tried rebooting and changing the media player settings. Its definitely sending to Wavio card.
Any ideas what might be wrong here, or is there anything I can look for?
Thanks.
Hi Luke,
All the connections are correct.
I believe it's defintly on the AYA side you should look for imo.
- be sure the actual emebeded AYA clock is not powersupplied (just remove the wires between the torroid and the AYA SPIDF/USB rails
- be sure your on board relays between TDA chip and the uf-l are routing the good side (with a buzzer : ring the hot point of each center of uf-l plug to the TDA pins and if uf-l cables are already pluged try to do it from the PCM boards to check the continuity.
The users of PCM board & AYA have already seen this problem : it can be also a bad soldered uf-l plug ! (check twith the buzzer)
On the PCM side : one jumper is ok : just Job (full speed is ok).
If you have no uf-l cables spare, I suggest you to take some at the next Ian Group Buy (it's easy to waste them)
All the thing is to check if current is flowing between the uf-l links - uf-l plugs to the TDA first 4 pins !
You have my PM if further help is needed.
I had these problems too and Ian helped me to check my boards but at the end I had just uf-l wires problems and only one PCM board I fried because the isolated side and power supply of the Wave I/O isolator ! As you already may do : use the non isolated side of the Wave I/O with the uf-l plugs : better electrical contact and despite it's not isolated it's sounds better (the importance of impedance matching and reliable interconnect with RF signals).
On the PC side, you know more than me, but it's a mess with Windows : be sure to disconnect on the PC audio Windows interface the others local outputts).
It didn't worked at the first try for me as well
cheers
cheers
All the connections are correct.
I believe it's defintly on the AYA side you should look for imo.
- be sure the actual emebeded AYA clock is not powersupplied (just remove the wires between the torroid and the AYA SPIDF/USB rails
- be sure your on board relays between TDA chip and the uf-l are routing the good side (with a buzzer : ring the hot point of each center of uf-l plug to the TDA pins and if uf-l cables are already pluged try to do it from the PCM boards to check the continuity.
The users of PCM board & AYA have already seen this problem : it can be also a bad soldered uf-l plug ! (check twith the buzzer)
On the PCM side : one jumper is ok : just Job (full speed is ok).
If you have no uf-l cables spare, I suggest you to take some at the next Ian Group Buy (it's easy to waste them)
All the thing is to check if current is flowing between the uf-l links - uf-l plugs to the TDA first 4 pins !
You have my PM if further help is needed
.I had these problems too and Ian helped me to check my boards but at the end I had just uf-l wires problems and only one PCM board I fried because the isolated side and power supply of the Wave I/O isolator ! As you already may do : use the non isolated side of the Wave I/O with the uf-l plugs : better electrical contact and despite it's not isolated it's sounds better (the importance of impedance matching and reliable interconnect with RF signals).
On the PC side, you know more than me, but it's a mess with Windows : be sure to disconnect on the PC audio Windows interface the others local outputts).
It didn't worked at the first try for me as well
cheers
cheers
@Luke
I have same configuration without any problem.
Please confirm the LRCK signal
data -----> SD
LRCK -----> WS
BCLK -----> SCK
MCLK -----> MCLK (J4)
Please confirm your TDA1541A is already in simultaneous mode.
Please read user's manual again to confirm everything is correct.
Regards,
Ian
Hi Luke,
No worry, your PCM board is safe. All output PINs are protected against short to GND
Regards,
Ian
I would suggest you buying a hot air rework station. It helps a lot on your Diy, and, it's not expensive
Ian
Nah it's expensive as I DIY less and less... and just want soldering simple passive parts now... If i had wanted to buy such a station it will be already at home !
Well maybe finally I will cut all the legs if not other simple way than cutting one or two legs !
Btw I find cool you have soldered in factory all the uf-l plugs now (it's was nightmare for me !)
Well maybe finally I will cut all the legs if not other simple way than cutting one or two legs !
Btw I find cool you have soldered in factory all the uf-l plugs now (it's was nightmare for me !)
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You can try this one:
https://www.amazon.ca/WEP-858D-Sold...qid=1495671027&sr=8-3&keywords=rework+station
I have something like this
https://www.amazon.ca/GOWE-high-tec...1495671097&sr=8-6&keywords=BGA+rework+station
Ian