Absolutely.
And regarding the Susumu, have you soldered them at the same time you added the CCSes ? because the latter mod sound clear and edgy at the bigenning, far more than the Susumu.
And regarding the Susumu, have you soldered them at the same time you added the CCSes ? because the latter mod sound clear and edgy at the bigenning, far more than the Susumu.
New dac boards to be mounted, so new CCS to be made. This time we do as the book says 🙂. Any tiny voltage peaks you see on the scope come from my mains. Don't have separation transformer for my bench yet. This small CCS board gives current smooth like a silk!
Once again, top work emyeuoi and carlsor!
Once again, top work emyeuoi and carlsor!
Getting there....
Great work Simon, I've put my dddac mods on hold as I had the opportunity to build a big class A amp, I kind of have to build it now or never.
I'll me back on with the dddac soon enough
@ Sovereign1
Thanks mate 🙂 Class A - nice and I use a Class A amp too. Keep me posted over email how it is going and what design\kit you are using.
Thanks mate 🙂 Class A - nice and I use a Class A amp too. Keep me posted over email how it is going and what design\kit you are using.
Nice work Simon! Congrats!!
I can see you took your time and effort to find fixed resistance falues for CCS. Second dac board for Cinemags is a must, don't wait too long 🙂
Update
Ups, I thought that were cinemags but are caps. I hope this will change soon too 🙂
I can see you took your time and effort to find fixed resistance falues for CCS. Second dac board for Cinemags is a must, don't wait too long 🙂
Update
Ups, I thought that were cinemags but are caps. I hope this will change soon too 🙂
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Thanks and yes second DAC board is being built now as adding and why you see the black wires poking up like you did 😉
Also cinemags are here too and can't wait to try. After that is done choke PSU then case.
Ross was the kind man to define the CSS fix resistors and he got it spot on thanks Ross!
Also cinemags are here too and can't wait to try. After that is done choke PSU then case.
Ross was the kind man to define the CSS fix resistors and he got it spot on thanks Ross!
I'm building my CCS'es this weekend. What value did you settle on for the fixed resistor?
Also I would like to ask if there is a 1/2 clock delay board for the red mainboard I can purchase from someone.
Also I would like to ask if there is a 1/2 clock delay board for the red mainboard I can purchase from someone.
I'm Back - PS issues
I am finally done enough with the move from 2 houses to 1 to come up for air in this forum.
The last thing I was doing was testing some Buffer power supplies to duplicate oscillation and come up with a fix. The kubota PS blew fuses and did enough harm to my DAC setup to make it sound bad. I just now started the process of trying to identify and replace the compromised components.
I Strongly advise that the testing and connecting of buffer power supply grounds be done with dummy resistor loads and NOT connected to the DAC. The ground path through the Buffer/DAC should also be part of the test setup in the form of a wire.
I am finally done enough with the move from 2 houses to 1 to come up for air in this forum.
The last thing I was doing was testing some Buffer power supplies to duplicate oscillation and come up with a fix. The kubota PS blew fuses and did enough harm to my DAC setup to make it sound bad. I just now started the process of trying to identify and replace the compromised components.
I Strongly advise that the testing and connecting of buffer power supply grounds be done with dummy resistor loads and NOT connected to the DAC. The ground path through the Buffer/DAC should also be part of the test setup in the form of a wire.
I will be connecting the cinemag transformers to to 2 DAC module DDDAC soon but I am not clear on the RLOAD resistor value required after looking at this link. Can someone assist with the value across the RCA outputs please? Thanks
Cinemag 15/15B (set of 2) - Audio Creative Shop
Cinemag 15/15B (set of 2) - Audio Creative Shop
Hi Simon,
As I recall, you want to have around 15k ohms resistance across the output of the cinemags, but you need to take into account the resistance from whatever preamp you're plugging it into. 50k is fairly typical, but it's dead easy to measure. Then you just need to use a parallel resistor calculator to work out the value needed to be around 15k when combined with your amp.
Also, a couple of us have played with having a very small value capacitor here as well as the resistor with good results. It's been proven to stop overshoot/ringing on a square wave signal with the cinemags and is cheap and simple. I'll have to have a dig to see what we used here.
Just checked my mails with Ross and it seems 150pf fkp3 caps across the cinemag outputs gave the best bang for buck for cleaning get things up without any negative effects. Definitely worth a try.
Thank you James that is a real help.
I assume resistor and cap in parallel right?
Just the two wires in to the transformers and two out right and the others are not connected at all?
Thanks James and hope your DAC is performing well for you. This thread has been very quiet recently....
I assume resistor and cap in parallel right?
Just the two wires in to the transformers and two out right and the others are not connected at all?
Thanks James and hope your DAC is performing well for you. This thread has been very quiet recently....
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Can someone confirm the exact wiring for cinemags please so I am clear for a single ended RCA output? Thanks
Yes thank you I have seen that but I assume the other coloured wires are therefor not connected at all right as this is what I need clarifying? White etc....
yeah, just ignore the white and black ones. A small number of people have found they needed to use them to cure buzzing or interference problems (although I'm not sure how or why), but most have just tied them up out the way.