Hi Sze & sklimek,
circuits on my hand was my friend email to me. Looks was came from the website that U post in the forum.
I had one question, since my friend need to repair his ML-2.
If I prepare a same PCB for him to repair, did any diyers had interest to test with me.
So.... I can save some PCB ordered price for both interested items price.
thx
thomas
circuits on my hand was my friend email to me. Looks was came from the website that U post in the forum.
I had one question, since my friend need to repair his ML-2.
If I prepare a same PCB for him to repair, did any diyers had interest to test with me.
So.... I can save some PCB ordered price for both interested items price.
thx
thomas
tube-lover said:
Hi Thomas, I could not get to it - test a pcb, I have too many projects that need completion - beautiful project though I hope it takes off.
Best - Stan
HI Jarthel,
You might want to get another email provider in addition to the one you have, it is pretty strange that you have gotten so many bounces.
Gmail or yahoo mail come to mind as possible alternatives.
You might want to get another email provider in addition to the one you have, it is pretty strange that you have gotten so many bounces.
Gmail or yahoo mail come to mind as possible alternatives.
hi jarthel,
I was prepare the groups buy ver.3 TDA1541a DAC, very large amount of emails. one day over 150 emails ask for different detal. post to forum that what else I can help U, Ok. I will do my best.
sorry late call back because the dac groups buy was end up on tomorrow.
pls see the power trans for the kit.
thx
thomas
I was prepare the groups buy ver.3 TDA1541a DAC, very large amount of emails. one day over 150 emails ask for different detal. post to forum that what else I can help U, Ok. I will do my best.
sorry late call back because the dac groups buy was end up on tomorrow.
pls see the power trans for the kit.
thx
thomas
Attachments
Help!!! My DAC stopped working
Hi all
My DAC, based on Thomas's V2 kit, suddenly stopped working this evening.
I have check all the power supplies pins. They are still OK. I have no scope so cannot check the signal.
Normally the LED light up when SPDIF signal is fed to the DAC but now no more. I guess the CS8414 or the pulse transformer could be dead.
Could Thomas or some one give me some advice?
Quan
Hi all
My DAC, based on Thomas's V2 kit, suddenly stopped working this evening.
I have check all the power supplies pins. They are still OK. I have no scope so cannot check the signal.
Normally the LED light up when SPDIF signal is fed to the DAC but now no more. I guess the CS8414 or the pulse transformer could be dead.
Could Thomas or some one give me some advice?
Quan
hi quantran,
pls check which problem, if pulse trans was dead, I will post one new to U. Ok??
Pls let me know U like the PCB or not, I can give U one set, ver.3 cheap version, Ok!!
thx
thomas
pls check which problem, if pulse trans was dead, I will post one new to U. Ok??
Pls let me know U like the PCB or not, I can give U one set, ver.3 cheap version, Ok!!
thx
thomas
I have no way to check the pulse trans because the winding has very low resistance --> cannot be measured with the multimetter that I have.
I will probably replace the CS8414 and see if it work. I would be very very regret if this cannot be fixed. I 've spent a lot of time and money upgrading the DAC. It was sounding really good before the breakdown.
I would appreciate it if you can give me the V3 PCB. I can arrange someone to collect it from you. Please advise if it's OK for you.
I will probably replace the CS8414 and see if it work. I would be very very regret if this cannot be fixed. I 've spent a lot of time and money upgrading the DAC. It was sounding really good before the breakdown.
I would appreciate it if you can give me the V3 PCB. I can arrange someone to collect it from you. Please advise if it's OK for you.
tube-lover said:
parallel AD1865 with SM5843 digital filter DAC,
hi,
I was prepare this dac, any comment of that??
since this dac can share my 1541a ver.3 DAC USB receiver & signal selection board.
I can low cost to prepare for it.
for the digital filter, prefer choose NPC SM5843 Good & reasonable price. parallel running for one pair AD1865 chips.
any comment!!!
pls advise.
thx
thomas
hi,
I was prepare this dac, any comment of that??
since this dac can share my 1541a ver.3 DAC USB receiver & signal selection board.
I can low cost to prepare for it.
for the digital filter, prefer choose NPC SM5843 Good & reasonable price. parallel running for one pair AD1865 chips.
any comment!!!
pls advise.
thx
thomas
Thomas,
If you are asking if anyone is interested in an ad1865 dac you can put me down for sure. I have wanted a dac based on this chip for some time 😀
If you are asking if anyone is interested in an ad1865 dac you can put me down for sure. I have wanted a dac based on this chip for some time 😀
hi beecan,
actually this is my friend's design. He's a digital engineer of japan SXXX in hong kong. He use full set audionote equipment longer time. Since he hope to prepare a parallel or balance ( I need to versify ) to hear the performance of this 1865. Audionote use this tube with 6111 tube for their DAC. Yesterday I had a tea with him & told him that now I had a small private assemble team in china. He not need to private print the PCb & test. I can prepare to him. He only need to debug will be Ok. Signal selection PCB of the ultimate ver.3 a can multi share with the Ultimate 1541a ver.3 & 1865. this can lower the total testing cost.
so I will do it shortly. detail will inform to share the experience.
OK.
thx
thomas
actually this is my friend's design. He's a digital engineer of japan SXXX in hong kong. He use full set audionote equipment longer time. Since he hope to prepare a parallel or balance ( I need to versify ) to hear the performance of this 1865. Audionote use this tube with 6111 tube for their DAC. Yesterday I had a tea with him & told him that now I had a small private assemble team in china. He not need to private print the PCb & test. I can prepare to him. He only need to debug will be Ok. Signal selection PCB of the ultimate ver.3 a can multi share with the Ultimate 1541a ver.3 & 1865. this can lower the total testing cost.
so I will do it shortly. detail will inform to share the experience.
OK.
thx
thomas
quantran said:
When I was testing the reclocking unit, I managed to ruin one CS8414. The symptoms where the same as yours. I replaced it with another 8414 but mounted it on a 8412 adapter using IC-sockets on the mainboard. This way it is easy to replace the 8414 if it dies out.
Hi bohrok2610
thanks for your advice. You are right. I recplaced the CS8414 with a CS8412 last night and the DAC works again. It seems to sound different with cs8412 but I am trying to figure out whether the sound is better or worse. CS8412 seems to sound clearer but a tad bright so I am still not very sure which is better.
The original cs8414 is made in Korea while this cs8412 is Taiwan made.
thanks for your advice. You are right. I recplaced the CS8414 with a CS8412 last night and the DAC works again. It seems to sound different with cs8412 but I am trying to figure out whether the sound is better or worse. CS8412 seems to sound clearer but a tad bright so I am still not very sure which is better.
The original cs8414 is made in Korea while this cs8412 is Taiwan made.
bohrok2610 said:
hi quantran,
I was happy to know U solve the problem.
bohrok2610, very thaks for your assistance to.
this is my recent testing DAC. any comment for this.
thx
thomas
I was happy to know U solve the problem.
bohrok2610, very thaks for your assistance to.
this is my recent testing DAC. any comment for this.
thx
thomas
Hi Thomas,
Any plans to come up with a PCM-56 Non-os Dac with tube output (passive I/V->anti-sync filter->plate choke/cap output)? Thanks.
fred
Any plans to come up with a PCM-56 Non-os Dac with tube output (passive I/V->anti-sync filter->plate choke/cap output)? Thanks.
fred
hi fred,
the ad1865 parallel DAC. I will only produce 8 sets only, on more matching chips.
PCM56 if I can get all the K gade chips I will let U know. will be the continous project. But I still advise use tube buffer with Pre-amp output ( cathode follower with pre-amp OPT).
any comment.
thx
thomas
the ad1865 parallel DAC. I will only produce 8 sets only, on more matching chips.
PCM56 if I can get all the K gade chips I will let U know. will be the continous project. But I still advise use tube buffer with Pre-amp output ( cathode follower with pre-amp OPT).
any comment.
thx
thomas
tube-lover said:
Thomas
Please make sure I can get one of those 8 🙂 I can paypal a deposit if you like
Hi Thomas,
That would be nice. I will watch out for this planned kit project... With OPT there is also the option of grounded cathode circuit. Maybe there should be 2 options of OPT circuit to suit the diyer's taste and system, one cathode follower the other grounded cathode. Just a suggestion. Thanks.
fred
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