tube-lover said:
I have some Tent Xo at home that I use regularly . Also an 11.289600.
I just insert the Tent Xo in your ver.3 TDA 1541A dac and listened.
Well the good Tent sound is there , and noticiable ( by my point of view) better than the one present on board . Expecially with the digital filter at work .
I am not saying that yours is bad ... just that I prefere the Tent and I believe that it is less Jittery .
As explained elsewhere pps is irrilevant to understand jitter and even less to measure it .
The Tent Xo specifications declare a 4pico seconds jitter ... if I am not wrong .
Thanks again for a very nice project .
hi stefanobilliani,
very thanks for your informations.
XO or VCXO tha I use on the ultimate version was 11.2896XX, I cannot make sure it was same as tentlab 11.289600 this accurancy. But it will very close. Another questions was about the jitter, I only ask for the factory about the spec of oscillator that I order must Lower jitter. I will ask for them if I special order in 4 pico sec that how much for it. Since this dac ( ultimate ver). will not over 45 degree temperature inside the chassis. Looks not need use TCXO in this area, unless I add the 5687 tube buffer. I can save some money to change for the low jitter version.
stefanobilliani, if the factory really can spec order for this this. I will order from them this low jitter oscillators that was same spec as tentlab.
I will try my best to maintain lower price to diyers.
This several days will updates for the low jitter oscillator detail.
Hope I can get this spec & in low price.
thx
thomas
very thanks for your informations.
XO or VCXO tha I use on the ultimate version was 11.2896XX, I cannot make sure it was same as tentlab 11.289600 this accurancy. But it will very close. Another questions was about the jitter, I only ask for the factory about the spec of oscillator that I order must Lower jitter. I will ask for them if I special order in 4 pico sec that how much for it. Since this dac ( ultimate ver). will not over 45 degree temperature inside the chassis. Looks not need use TCXO in this area, unless I add the 5687 tube buffer. I can save some money to change for the low jitter version.
stefanobilliani, if the factory really can spec order for this this. I will order from them this low jitter oscillators that was same spec as tentlab.
I will try my best to maintain lower price to diyers.
This several days will updates for the low jitter oscillator detail.
Hope I can get this spec & in low price.
thx
thomas
hi all ,
full balance of 1541a arrived.
take a look.
photos show was the sample ---A, B & C was coming!!!
I was testing my new sample 1541a ( Full balance DAC).
This DAC was collect many diyers feedback in this forum & change, layout, ground, parts choice. Now was try to search a low jitter XO or VCXO to further lower the jitter of this dac. Any comments to improve more????
This toy, I thought full balance may be the ending of the 1541a chips.
any comments were welcome because I hope this will be one of the best 1541a in diyaudio.
thx
thomas
full balance of 1541a arrived.
take a look.
photos show was the sample ---A, B & C was coming!!!
I was testing my new sample 1541a ( Full balance DAC).
This DAC was collect many diyers feedback in this forum & change, layout, ground, parts choice. Now was try to search a low jitter XO or VCXO to further lower the jitter of this dac. Any comments to improve more????
This toy, I thought full balance may be the ending of the 1541a chips.
any comments were welcome because I hope this will be one of the best 1541a in diyaudio.
thx
thomas
Attachments
more photos.
digital signal pass the 7220P/B & use XC9572Xl ( CPLD) to seperate
left channel (+ & - date to left channel 1541a) Right channel (+ & - date to right channel 1541a chip).
so this will be veru good for previous diyers which buy two chips.
thx
thomas
digital signal pass the 7220P/B & use XC9572Xl ( CPLD) to seperate
left channel (+ & - date to left channel 1541a) Right channel (+ & - date to right channel 1541a chip).
so this will be veru good for previous diyers which buy two chips.
thx
thomas
Attachments
Hi Thomas!
The dac looks nice. Confirm that each channel has the balance output n single ended output as well?
Cheers!
Eddy.
The dac looks nice. Confirm that each channel has the balance output n single ended output as well?
Cheers!
Eddy.
hi eddy,
this is the first sample.
another two was coming. I need to test more & this is a full ( real balace ) dac, It had 4I/V so why every channel use two 5532 & one 5534 output.
SE every channel will very easy to change.
Next I wil try to prepare 4 SE output trans for the balance.
This will be same use two SE OPT & working as a PP OPT, but SE trans had airgap. sec harmonic will rich. I hope to try this too.
Btw, every dac ( balance) version can totally working with 4 chips. U can choose paralell two chips (every channel one chip more) & running in Full balance & full parallel DAC. I thought this may be the final version of 1541a DAC.
Power trans ( isolate one) will directly solder into the power supply PCB, will not same as this. Every dac will contain two power trans. Less cable will looks clear.
This dac will same be fully test fully funish & willse CS8412-IS.
Five minutes before I received a phone call that the low jitter 11.2896XX oscillator was found already. but this must tailor made.
Must waiting at least 4 weeks. I will choose this for all my coming dac.
AD1865 full balance was coming too.
thx
thomas
this is the first sample.
another two was coming. I need to test more & this is a full ( real balace ) dac, It had 4I/V so why every channel use two 5532 & one 5534 output.
SE every channel will very easy to change.
Next I wil try to prepare 4 SE output trans for the balance.
This will be same use two SE OPT & working as a PP OPT, but SE trans had airgap. sec harmonic will rich. I hope to try this too.
Btw, every dac ( balance) version can totally working with 4 chips. U can choose paralell two chips (every channel one chip more) & running in Full balance & full parallel DAC. I thought this may be the final version of 1541a DAC.
Power trans ( isolate one) will directly solder into the power supply PCB, will not same as this. Every dac will contain two power trans. Less cable will looks clear.
This dac will same be fully test fully funish & willse CS8412-IS.
Five minutes before I received a phone call that the low jitter 11.2896XX oscillator was found already. but this must tailor made.
Must waiting at least 4 weeks. I will choose this for all my coming dac.
AD1865 full balance was coming too.
thx
thomas
Attachments
tube-lover said:
Hi Thomas!
Thanks for the info! Anyway, r u coming out with V3 ultimate balance first or the V3 ultimate(non balance)?
Cheers!
Eddy.
Hi Thomas,
Very nice, good job !
I would like a kit also.
Please put me on your list for the newest !
I've a VRDS25 and the dac is not very good.. And i'm very interesting by your project. My others electronics, BLS and ZEN from N. PASS.
Best regards, fx-44.
Very nice, good job !
I would like a kit also.
Please put me on your list for the newest !
I've a VRDS25 and the dac is not very good.. And i'm very interesting by your project. My others electronics, BLS and ZEN from N. PASS.
Best regards, fx-44.
Hi thomas,
I just receive the two CD rom Kit for me and my friend Nicolas Guenard. Really nice job. I really like the multi pcb configuration, that' really cool for diy casing.
Marc
I just receive the two CD rom Kit for me and my friend Nicolas Guenard. Really nice job. I really like the multi pcb configuration, that' really cool for diy casing.
Marc
hi tom, did you send me this rc?or the old one?
p.s. what's the price of the new dac version?
p.s. what's the price of the new dac version?
he loves to keep us waiting... 
hi raikkonen,
I was calculate the total price tha I can do now.
within 24hours will let all know because I need to confir the price of the low jitter ( 5PPm) which supply by NSK japan.
thx
thomas
I was calculate the total price tha I can do now.
within 24hours will let all know because I need to confir the price of the low jitter ( 5PPm) which supply by NSK japan.
thx
thomas
One point of feedback on the new PCB. Why are the connections between the main PCB and supply PCB so close together? I think it would be better to use the whole width of the board, like with the first design. This way, the path from the regulators to the DAC chips is not longer than necessary!
Fedde
ps. But I will stay with the current version anyway, satisfied for now!
Fedde
ps. But I will stay with the current version anyway, satisfied for now!
hi,
NSK email arrived already.
Hope stefanobilliani will love this Osicillator.
Detail technical information will inform later.
new ultimate ver.3 1541a DAC will supply to market on 2006-09-20.
All were fully funish & test.
contain.
1. Power supply PCB with 9 section of power supply with two PCB mould isolated power transformers, one for Dac, one for USB receiver!!
2. Additional power supply board, during parallel two TDA1541a chips, I was afraid the power supply may be will little unstable, so additional one power supply board for the extra 1541a chip PCB Board.
3. Extra 1541a ( one chips ) which an parallel to the first chip on the main PCB.
***( 28 pcs of the couplingcaps of two 1541a will close match as the non-profit version)***
Caps will match in 0.095~0.099,0.1~0.115 two groups.
4. Source input selection board, Use MCU to control the the switch click sound, relay switch for the source input.
source input had 1. RCA. 2, BNC. 3, TL ( for CD-Rom) 4, Real balance whic seperate to the SE selection , there will total two nano-amorphous pulse trans fit into the source input board.
5. MCU control with selector & indicator on the facelet( stadard was theLED, later can upgrade to LCD, I did ot suggest the VFD one , worry about the noise.
6. USB receiver use PCM2906.
7. two output transformers which can select the output stage 0~150~600Ohm or real balance output. Also had op-amp output two. later will optional 5687 tube output stage for diyers connect the op-amp to tubes buffer. Also can connect to the pre-amp output too.
5687 will use HV working volatge, since I did not like the low voltage such as the LV 6DJ8. dynamic not good. 5687 tube cathode follower buffer, every channel use one tube. I had many 1959 CSF (made in france ) military
8. Oscillator will low jitter which was 5ppm & OEM by NSK (japan) no photos now, will post later.
http://www.nsk.com.cn/
9. Two Isolate power transfomrers was same as the non profit version, one for dac one for USB receiver.
10.cables follow:
Belden 1505a ( digital cable)
signal cables
gotham or sommer cables.
small new products 5N rectange copper, telfon coating flat cable will free to follow with kit for diyers to test the new products.
my new website. www.diyaudio.hk
Old name www.diyaudiocraft.com name was too long.
photo show the NSK oscillator on the japan hi-end cd-machine, ver.3 ultimate will use VCXO.( USD 26 per one). not this cheap one. VCXO will low jitter & 5PPM.
since all the parts was almost the the best in the dac, fully funish & test, with USB receiver. Re-clock was low jitter,so the price will
thx
thomas
NSK email arrived already.
Hope stefanobilliani will love this Osicillator.
Detail technical information will inform later.
new ultimate ver.3 1541a DAC will supply to market on 2006-09-20.
All were fully funish & test.
contain.
1. Power supply PCB with 9 section of power supply with two PCB mould isolated power transformers, one for Dac, one for USB receiver!!
2. Additional power supply board, during parallel two TDA1541a chips, I was afraid the power supply may be will little unstable, so additional one power supply board for the extra 1541a chip PCB Board.
3. Extra 1541a ( one chips ) which an parallel to the first chip on the main PCB.
***( 28 pcs of the couplingcaps of two 1541a will close match as the non-profit version)***
Caps will match in 0.095~0.099,0.1~0.115 two groups.
4. Source input selection board, Use MCU to control the the switch click sound, relay switch for the source input.
source input had 1. RCA. 2, BNC. 3, TL ( for CD-Rom) 4, Real balance whic seperate to the SE selection , there will total two nano-amorphous pulse trans fit into the source input board.
5. MCU control with selector & indicator on the facelet( stadard was theLED, later can upgrade to LCD, I did ot suggest the VFD one , worry about the noise.
6. USB receiver use PCM2906.
7. two output transformers which can select the output stage 0~150~600Ohm or real balance output. Also had op-amp output two. later will optional 5687 tube output stage for diyers connect the op-amp to tubes buffer. Also can connect to the pre-amp output too.
5687 will use HV working volatge, since I did not like the low voltage such as the LV 6DJ8. dynamic not good. 5687 tube cathode follower buffer, every channel use one tube. I had many 1959 CSF (made in france ) military
8. Oscillator will low jitter which was 5ppm & OEM by NSK (japan) no photos now, will post later.
http://www.nsk.com.cn/
9. Two Isolate power transfomrers was same as the non profit version, one for dac one for USB receiver.
10.cables follow:
Belden 1505a ( digital cable)
signal cables
gotham or sommer cables.
small new products 5N rectange copper, telfon coating flat cable will free to follow with kit for diyers to test the new products.
my new website. www.diyaudio.hk
Old name www.diyaudiocraft.com name was too long.
photo show the NSK oscillator on the japan hi-end cd-machine, ver.3 ultimate will use VCXO.( USD 26 per one). not this cheap one. VCXO will low jitter & 5PPM.
since all the parts was almost the the best in the dac, fully funish & test, with USB receiver. Re-clock was low jitter,so the price will
thx
thomas
Attachments
hi fedde,
photos shows was the sample--a of full balance one. I wil post all the sample a~c to collect opinions don't worry for this.
thx
thomas
photos shows was the sample--a of full balance one. I wil post all the sample a~c to collect opinions don't worry for this.
thx
thomas
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