Use entirely at your own risk!! Hi all, despite all the interest, I never had anyone offer to run a groupbuy for this project, however, I have found another distribution method. I am sharing the board via oshpark.com. Here is the link to the latest version:
OSH Park ~ dac1-v14
I will not be available for support and make no representation that the circuit or board is functional in any way. I have not built it. Use entirely at your own risk!! I am not making any money from the sale, just using the free service to host. All I ask is that if it works for you, make a donation to diyaudio, and if you have a spare and would like to send it to me that would be nice.
The shared version is configured for external ps like the salas or regulator available from diyaudio store.
Thanks,
Chris
P.S. Use entirely at your own risk!!
OSH Park ~ dac1-v14
I will not be available for support and make no representation that the circuit or board is functional in any way. I have not built it. Use entirely at your own risk!! I am not making any money from the sale, just using the free service to host. All I ask is that if it works for you, make a donation to diyaudio, and if you have a spare and would like to send it to me that would be nice.
The shared version is configured for external ps like the salas or regulator available from diyaudio store.
Thanks,
Chris
P.S. Use entirely at your own risk!!
Attachments
Joshua has the CD777 from T Loesch from AMR.I'm really not sure better result can be done from DIY with few money :
-ECdesign solded TDA1541 readymade module but the output has to be made like the I2S feeding... not an easy task IMHO if the DIYER is not very experienced.
-cd77 from AMR is far more expensive than the CD777.
- Link above about Guido Tent : hard to know which the better between the CD77 & The last Tent if not listened side by side, maybe not an easy thing in the OP country ?
- ready made design with multiple AD844 or brand new fast video OPA ? If the goal is to stay with the TDA 1541 ? Are there many TDA1541 with this design on shelves ? The output stage has to be on the same good level as the I/V stage. The OP seem to appreciate tubes texture...
-ECdesign solded TDA1541 readymade module but the output has to be made like the I2S feeding... not an easy task IMHO if the DIYER is not very experienced.
-cd77 from AMR is far more expensive than the CD777.
- Link above about Guido Tent : hard to know which the better between the CD77 & The last Tent if not listened side by side, maybe not an easy thing in the OP country ?
- ready made design with multiple AD844 or brand new fast video OPA ? If the goal is to stay with the TDA 1541 ? Are there many TDA1541 with this design on shelves ? The output stage has to be on the same good level as the I/V stage. The OP seem to appreciate tubes texture...
Hi Alexis,
Thank you very much.
Since I own the AMR CD-777, it seems there is no point in going for anything else that may not surpass it.
Thanks!
Chris, you are the
man! Thanks so much for your efforts. I am definitely interested in building this board.
I hope you don't mind if I ask you to also upload the board (or Eagle file) with on-board TL431. This way one can build both and then compare the two approaches.
Also, can you add the labels for component values or provide a reference (legend) sheet to know and check the values of each component?
Thanks!
Chris, you are the
man! Thanks so much for your efforts. I am definitely interested in building this board.I hope you don't mind if I ask you to also upload the board (or Eagle file) with on-board TL431. This way one can build both and then compare the two approaches.
Also, can you add the labels for component values or provide a reference (legend) sheet to know and check the values of each component?
Thanks!
Eldam you could be absolutely right but this is DIY forum, please don't be so discouraging. Apart from good sound it is also a learning place for many including me.
no, no I'm not.The OP has a good reference. Hard to beat at this price and seem match the taste of the OP : multibitdac, tubes... if i followed correctly.
Here We have some solutions as half DIY as I wrote (ECdesign TDA1541 : because this dac chip is on th eexpensive DAC77 the big brother which seem expensive for the OP... and it is.)
As I see MR Joshua looking for a long time, maybe in the spirit of the post above of the other fellow, it is a difficult task and i think it is, i'm honnest and not want discourage anybody here.
Note that Mr Tent sell diy module as well. I'm not sure Joshua want to put the hands in such circuit :but sure I can do a mistake here.
Finally I'm the first who want to learn as I have myself a bad skill level... but the tittle of the thread seem clear to me : we talk about KITS and so I answer in this spirits : with kit solutions. You can see elsewhere the OP like me in another digital thread for the pleasure to follow and learn of course.
Hope it's clearer for you.
and I absolutly know that it is a diy forum... as you can observe we can have some points of reference wghich are not DIY to compare. The OP has this point of reference with the goal to do equal and certainly better with the TDA1541 dac chip. You can see my post as a +1 about what Alexiss wrote... that's all, nothing wrong for anybody.
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Yes red Baron seems good, maybe it lakes some better grounding for I2S (SGSGSGSG and not SSSSG for connect the wires (read it in a recent post with links given by Marce fellow: this last sort of grounding is really needed for better result for I2S in all the designs). And the kit doesn't resolve the problem of feed this kit... not easy feed it with I2S as it has to be shorter than short?! Maybe the outputstage is a little complex with 2 pcb (but it is DIY, doesn't it?)... and seems not to be the better way to match the texture of a good tube stage designed for the TDA1541... like Mr Loesch do since more than 20 years (some good old shematic here and elsewhere...).
The PCB of Vanofonk is very pretty and the decoupling caps are nearer from the pads of TDA 1541 (but you have not the choice to put MKT or polymer os-con.. which seems only important for just the two higher values for the dividers) : is it an ECdesign inspired one?
Maybe an AMARENO if the laptop is near the hifi system (or a long usb wire between the amareno and the laptop). Or maybe a Sure Electronics module with toslink and spidf input with W8804 chip to I2S ? www.surelectronic.net
Any kit with video opa chip as I/V convertor like your fellow countryman seems to have excellent result with ad844 ?
A nice pcb would be pleasant as I read we need 3X ad844 (by channel ?) for the I/V and it's too difficult to stack for poor skilled people like me which prefer listen Opera or jazz and not put fire in the house
The PCB of Vanofonk is very pretty and the decoupling caps are nearer from the pads of TDA 1541 (but you have not the choice to put MKT or polymer os-con.. which seems only important for just the two higher values for the dividers) : is it an ECdesign inspired one?
Maybe an AMARENO if the laptop is near the hifi system (or a long usb wire between the amareno and the laptop). Or maybe a Sure Electronics module with toslink and spidf input with W8804 chip to I2S ? www.surelectronic.net
Any kit with video opa chip as I/V convertor like your fellow countryman seems to have excellent result with ad844 ?
A nice pcb would be pleasant as I read we need 3X ad844 (by channel ?) for the I/V and it's too difficult to stack for poor skilled people like me which prefer listen Opera or jazz and not put fire in the house
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I dont have the technical background to make a TDA1541 from scratch and now im in my 50s its harder to see but TDA is a great chip has such potential even after all these years, I have had so many dacs Technics, CS, AMD, BB, ect but i have just decided that i will settle with the TDA1541 and ES1923 dacs.
Yes me too... I'm not experienced also but try to learn theory to understand more and find pleasure (with few money) if I can to try soldering pcb or maybe in a near future test double layer board (with continuaous ground as it is important for digital); I think to have your skill level like the OP one... more and less but very near ! I want also a little DIY design for my TDA 1541s chips but simple in the spirit of the initial op answer. Bought a chineese kit 5 years ago and learn a lot with that... because the design was poor (which a less expensive Red Baron is not with some of the good ideas of John from ECdesigns and a continuous ground plane))
: just assembly two ready made pcbs and a little soldering or cook curry with caps ... that's all I 'm able to do now! Playing with tubes may just kill me !
Georgehifi from Australia here is following the work of some good "old" specialist with multidac and fast video operational amp for I/V stage like Pedja maid (or closely maid) and report what he finds. Some others in Russia had good designs too here but hard to follow because the language of their own site sometimes.
I hope to find a all in one pretty pcb with TDA1541 to solder the components but with some ready made things :
-good I2S input with inputs holes very near the dac chip just before the atenuators and with spliters for SPIDF input (believe the red baron do this last thing... but not sure) or splitter with the design for W8804 spidf input chip like I learn few monts ago from the Subbu DAC.
- passive I/V with a good resistor like bulk or smd wirewound Rhopoint Z foil resitor or with passive with minimal theoric resistor value (around 18 ohms if i remember) + active 844 (or any as good video opa).
- output for tubes stage with splitter for discrete alternative
_ soic reg or soic DC/DC converter near the dac chip to have stable voltage and not mixed local impedance.
an icing on the cake, a peach on the Melba would be an integrated masterclock to slave the source as it seems jitter is one of the evil's details... even if it's less important with Non oversampling design.
Yes its diy here but only the best can do this : because need a lot of knowledge in many different domains !
Note there is an interesting thread where L Toesch explain how to beginn from scratch to play around the TDA 1541 with simple test pcb boards...ECdesign thread also... that I gave up after a headache to understand how he proceeds with masterclock crystal and dividers chips !
: just assembly two ready made pcbs and a little soldering or cook curry with caps ... that's all I 'm able to do now! Playing with tubes may just kill me !
Georgehifi from Australia here is following the work of some good "old" specialist with multidac and fast video operational amp for I/V stage like Pedja maid (or closely maid) and report what he finds. Some others in Russia had good designs too here but hard to follow because the language of their own site sometimes.
I hope to find a all in one pretty pcb with TDA1541 to solder the components but with some ready made things :
-good I2S input with inputs holes very near the dac chip just before the atenuators and with spliters for SPIDF input (believe the red baron do this last thing... but not sure) or splitter with the design for W8804 spidf input chip like I learn few monts ago from the Subbu DAC.
- passive I/V with a good resistor like bulk or smd wirewound Rhopoint Z foil resitor or with passive with minimal theoric resistor value (around 18 ohms if i remember) + active 844 (or any as good video opa).
- output for tubes stage with splitter for discrete alternative
_ soic reg or soic DC/DC converter near the dac chip to have stable voltage and not mixed local impedance.
an icing on the cake, a peach on the Melba would be an integrated masterclock to slave the source as it seems jitter is one of the evil's details... even if it's less important with Non oversampling design.
Yes its diy here but only the best can do this : because need a lot of knowledge in many different domains !
Note there is an interesting thread where L Toesch explain how to beginn from scratch to play around the TDA 1541 with simple test pcb boards...ECdesign thread also... that I gave up after a headache to understand how he proceeds with masterclock crystal and dividers chips !
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Chris, you are the
I hope you don't mind if I ask you to also upload the board (or Eagle file) with on-board TL431. This way one can build both and then compare the two approaches.
Also, can you add the labels for component values or provide a reference
(legend) sheet to know and check the values of each component?
Thanks!
Here is v10 with the tl-431. Again, use at your own risk.
OSH Park ~ dac1-v10
I'll do my best at getting part values, but earliest will probably be this weekend. Earlier in the thread some of the values were discussed specifically by Thorsten. I can publish my layout for Thorsten's 6922 i/v as well, but not sure if I need permission from him.
Chris
Attachments
Thorsten the Man of TDA1541A:
vanofmonks has done some hard work here
http://www.diyaudio.com/forums/digi...any-good-tda1541a-dac-kit-57.html#post3866751
&
http://www.diyaudio.com/forums/digi...any-good-tda1541a-dac-kit-58.html#post3868497
Can you please post some comments?
He is also looking to hear from you if he can publish boards of your Final 6922 i/v stage?
Hmm, the layout is ... not ideal. The PS cap order is backwards: high freq bypass further than electrolytics?
As well, the ground path for the multiple decoupling caps is cut by the analogue outputs so the currents have to take the long way around to get back to the chip ground pin.
Not ... ideal.
And vanofmonks although tighter ... not confirmed to work.
And I don't see how this could be used with a TDA1541
So ... still no good cheap TDA1541 DAC kit ...
PS If I lived by Thorsten Loesch, I'd egg his house--I've been begging for an easy 1541 PCB for a ... decade. (Just kidding T!)
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The OP has a good reference. Hard to beat at this price and seem match the taste of the OP : multibitdac, tubes... if i followed correctly.
Here We have some solutions as half DIY as I wrote (ECdesign TDA1541 : because this dac chip is on th eexpensive DAC77 the big brother which seem expensive for the OP... and it is.)
As I see MR Joshua looking for a long time, maybe in the spirit of the post above of the other fellow, it is a difficult task and i think it is, i'm honnest and not want discourage anybody here.
Note that Mr Tent sell diy module as well. I'm not sure Joshua want to put the hands in such circuit :but sure I can do a mistake here.
Finally I'm the first who want to learn as I have myself a bad skill level... but the tittle of the thread seem clear to me : we talk about KITS and so I answer in this spirits : with kit solutions. You can see elsewhere the OP like me in another digital thread for the pleasure to follow and learn of course.
Hope it's clearer for you.
Hi,
You are absolutely correct about my considerations.
... for a decade!!!
For the record:
T's TDA1541 hints:
http://www.diyaudio.com/forums/digi...any-good-tda1541a-dac-kit-36.html#post2887893
Getting the CS8412 goin' :
http://www.diyaudio.com/forums/digi...any-good-tda1541a-dac-kit-55.html#post3505444
Anyone try the vanofmonks PCB yet?
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