Thank you, much appreciated.
One further question, could you tell me what the secondary output voltages are on the transformers found on the ‘mains card’ in the DaCapo dac.
thanks
Just bought a Cardinal for repair and I was wondering if there is a service manual for this model.
Anyone tried any modern word clock compatible usb-spdif yet?
We have Mtech evo converter which is compatible with a 128fs clock.
Newly added Mutec MC3+ USB which looks like it will also accept a 128fs word clock.
This means we potentially have two devices we can feed the clock lock cards clock and feed the spdif signal back into the digital in for a clock locked async usb replay.
We have Mtech evo converter which is compatible with a 128fs clock.
Newly added Mutec MC3+ USB which looks like it will also accept a 128fs word clock.
This means we potentially have two devices we can feed the clock lock cards clock and feed the spdif signal back into the digital in for a clock locked async usb replay.
Been using the xmos board myself externally but hope to try either m2tech evo converter or the mc3+ usb thing feeding my clock lock card instead.
If John W pops in after reading your review about the clock in the Da-Capo and the discrete 1 bit be so sensitive to quality of clock and you ending up designing a rather large clock and clock cleaner circuit for a relatively simple DAC. Can you actually remember how accurate you eventually got the clock in the Da-Capo.
Anyone with dead unit/units got a spare optical input card they’d want to part with?
Could also be interested in spdif and clock lock inputs as well 🙂
Could also be interested in spdif and clock lock inputs as well 🙂
About to get last bit to set up my music ripper server/streaming system that will be clock locked to da-capo.
Still canny decide between Logitech Transporter (which handles 128fs clock input) and m2tech evo2 usb-spdif which will also handle a 128fs clock input. So both should be compatible with the clock lock input cards designed for cardinal.
John
Still canny decide between Logitech Transporter (which handles 128fs clock input) and m2tech evo2 usb-spdif which will also handle a 128fs clock input. So both should be compatible with the clock lock input cards designed for cardinal.
John
Next time I can brave the basement, I'll dig one up from my unit....
If your feeling brave then there are modifications that can have a big impact on the Dacapo's discrete DAC section.
If your feeling brave then there are modifications that can have a big impact on the Dacapo's discrete DAC section.
I’d happily make some mods to improve it.... know the output stage can be improved too but probs beyond me.
Glad I still have a running one. And really looking forward to trying with clock locked streaming/flac server. According to transporter designer his digital out when synced to a clock should be about 4ppm with incoming clock which I should imagine is superb for the da-capo.
Here is a question. Someone who worked at PT reckons PT managed to make the da-capo with one of caps under dac metal can the wrong way round. Did they actually do this? And if yes what did it do and would correcting it help any?
Glad I still have a running one. And really looking forward to trying with clock locked streaming/flac server. According to transporter designer his digital out when synced to a clock should be about 4ppm with incoming clock which I should imagine is superb for the da-capo.
Here is a question. Someone who worked at PT reckons PT managed to make the da-capo with one of caps under dac metal can the wrong way round. Did they actually do this? And if yes what did it do and would correcting it help any?
Last edited:
Just picked up a slimdevices transporter so my flac music library / ripper / streamer server will soon be running clock locked to da-capo 🙂
Designer reckoned in his testing when fed a clock the data should come out to dac with accuracy to clock fed in of 4ppm which should allow da-capo to perform at its very best. Really like fact transporter was made with proper BNC connectors on digital in, out and word clock input 🙂
Attachments
Last edited:
Mr MAC,
If you can confirm the transporter supports 128 CLK input - also once clocklocked, then you can only playback 44.1KHz files (CD rips etc).
buy cutting track sunder the potted module and injecting the clock then you can bypass the DAC's PLL based clock - driven directly by the Crystal on the Clock lock DIC...
WRT the reversed Cap under the potted DAC section, I'm not aware of this, but this might have occurred after I left PT - it would explain a later Dacapo board (built after i left) I have here that failed under the potted section... It could be a Tant cap reversed in the PLL Loop BW filter...
Dacapo can’t do much more than 44.1 anyway 🙂
That is also fine as iirc LMS can transcode on fly if fed with something higher anyway.
Hmmm need to know more about the mod and what I gain and loose by doing it 🙂 assume mod will mean clock lock only and loose spdif cards? Or could mode be made switchable? Hmmm may need a 2nd da-capo to compare how mod sounds.
Many thanks 🙂
Yep appears transporter and m2tech evo2 usb-spdif are only two ways to clock lock da-capo to a streamer/music server type setup as they are only two I can find that will take a 128fs word clock.
Will also compare spdif non-clock locked and the transporters own dac via its balanced outputs and see how each performs and what wins out as best performer.
That is also fine as iirc LMS can transcode on fly if fed with something higher anyway.
Hmmm need to know more about the mod and what I gain and loose by doing it 🙂 assume mod will mean clock lock only and loose spdif cards? Or could mode be made switchable? Hmmm may need a 2nd da-capo to compare how mod sounds.
Many thanks 🙂
Yep appears transporter and m2tech evo2 usb-spdif are only two ways to clock lock da-capo to a streamer/music server type setup as they are only two I can find that will take a 128fs word clock.
Will also compare spdif non-clock locked and the transporters own dac via its balanced outputs and see how each performs and what wins out as best performer.
Last edited:
Anyone know the dimension or model of batteries for the DC before I order some. Just to save me dragging it out to put away again till get cells and transporter here.
My current dc has all batteries half width and all same voltage cells (my earlier DC had mix of larger double the voltage ones and half width ones).
My current dc has all batteries half width and all same voltage cells (my earlier DC had mix of larger double the voltage ones and half width ones).
Last edited:
What batteries should be in the DC????
My old on had a larger and smaller battery in 4 banks??? (Just a guess) 1 larger and 1 smaller so guessing 12v and 6v making 18v. I have also seen same arrangement but using 3x 6v cells. Tonight I am seeing what looks like all 12v cells (or are they just large 6v ones?) yeah must be bigger 6v ones and sure my current one is using 3v cells so 6 per 18v bank.
See the three photos. I take it it’s just a case of what will fit in case and maybe people maximising capacity fitting larger cells.
My old on had a larger and smaller battery in 4 banks??? (Just a guess) 1 larger and 1 smaller so guessing 12v and 6v making 18v. I have also seen same arrangement but using 3x 6v cells. Tonight I am seeing what looks like all 12v cells (or are they just large 6v ones?) yeah must be bigger 6v ones and sure my current one is using 3v cells so 6 per 18v bank.
See the three photos. I take it it’s just a case of what will fit in case and maybe people maximising capacity fitting larger cells.
Attachments
Hi Mr mac,
So you want 18V per Bank - and the largest cells you can find that will fit the case.
I believe (from feedback that came to me) the original Cell size is no longer available - the cells used in the last unit pictured is a great solution if the are 6V cells...
WRT to the German unit - I have no idea whats going on here, you can see the same type caps have also leaked on the DC input card - and the caps in the Digital section, so these should also have been replaced...
If you wanted a donor unit then I could repair and update this unit with Clock lock card - it has the HDCD filter which IMO is the best.
I'm also JUST working on a FPGA solution for the never ending FDAC / MDACII project, parts of this "IP" could be tested on a modulator board for the Dacapo.
So you want 18V per Bank - and the largest cells you can find that will fit the case.
I believe (from feedback that came to me) the original Cell size is no longer available - the cells used in the last unit pictured is a great solution if the are 6V cells...
WRT to the German unit - I have no idea whats going on here, you can see the same type caps have also leaked on the DC input card - and the caps in the Digital section, so these should also have been replaced...
If you wanted a donor unit then I could repair and update this unit with Clock lock card - it has the HDCD filter which IMO is the best.
I'm also JUST working on a FPGA solution for the never ending FDAC / MDACII project, parts of this "IP" could be tested on a modulator board for the Dacapo.
Last edited:
Hopefully I can make these fit 107x70x45 6v and they have a rather good 5Ah. Will measure the space up tonight.
I’ll find a 2nd at some point for doing mods to but German one is too much for me at moment as just bought some new bits to get hi-do going and still to get batteries. Was just puzzled at lack of all the caps.
https://cpc.farnell.com/pro-elec/pel01430/battery-lead-acid-6v-5ah/dp/BT06690?st=Lead acid
I’ll find a 2nd at some point for doing mods to but German one is too much for me at moment as just bought some new bits to get hi-do going and still to get batteries. Was just puzzled at lack of all the caps.
https://cpc.farnell.com/pro-elec/pel01430/battery-lead-acid-6v-5ah/dp/BT06690?st=Lead acid