DECODER PSU
Hi everybody.....
I just finished and installed a decoder psu. After a long study and the input I received from all of you, here are my final choices:
2x9V 7VA TX
4x hexfred + 2200uF Pana FC + LM340AT-5 for the digital rails Pin 15 and 44. (this one decoupled with a 220uF ZA)
4x hexfred + 2 x 470uF BG std + 2x LM340AT-5, (one reg for pin 11 decoupled with a 220uF BG std and the other reg for the HF/RF on R505 also decoupled with a 220uF BG std on C504)
I used Brent´s wonderfull psu pcb´s.... this made everything faster and fuss free.
I must wait for everything to settle but I can already hear some very important changes: Attack on acoustic string instruments like guitar or bass is much faster.
I can now hear more detail in the metal dishes of the drums.
Bass is fullbodyied and powerfull but with more edge attack.
Hope the burning will integrate everything again and bring female voice back to normal sweet state (now a bit edgy).
But the best difference is in the size of the soundstage... now it is almost on par with the TT. (I believe that the subliminar high freq info, now aparent, helps a lot in recreating a vivid, focused and life size sound presentation.) (Simon - as usual you were right).
Once more I did it succefully at first time... I seem to be getting good at this...
Ricardo
Hi everybody.....
I just finished and installed a decoder psu. After a long study and the input I received from all of you, here are my final choices:
2x9V 7VA TX
4x hexfred + 2200uF Pana FC + LM340AT-5 for the digital rails Pin 15 and 44. (this one decoupled with a 220uF ZA)
4x hexfred + 2 x 470uF BG std + 2x LM340AT-5, (one reg for pin 11 decoupled with a 220uF BG std and the other reg for the HF/RF on R505 also decoupled with a 220uF BG std on C504)
I used Brent´s wonderfull psu pcb´s.... this made everything faster and fuss free.
I must wait for everything to settle but I can already hear some very important changes: Attack on acoustic string instruments like guitar or bass is much faster.
I can now hear more detail in the metal dishes of the drums.
Bass is fullbodyied and powerfull but with more edge attack.
Hope the burning will integrate everything again and bring female voice back to normal sweet state (now a bit edgy).
But the best difference is in the size of the soundstage... now it is almost on par with the TT. (I believe that the subliminar high freq info, now aparent, helps a lot in recreating a vivid, focused and life size sound presentation.) (Simon - as usual you were right).
Once more I did it succefully at first time...
I seem to be getting good at this... Ricardo
Fortunately, this last mod did not require pcb removal...hotiron said:
Jees Ricardo How do you manage to get the board out and back without
breaking it!!!!
Hi SimonSimontY said:Ricardo, you've done some stunning work there, you must be very proud!
I've been busy this weekend, working on things to bring other areas closer to my CD63
I am quite proud right now.... and I feel rewarded.... lots of work and so little time
What other areas are you working on now ?
Ricardo
Just reporting....
From my listening sessions during this weekend, I can assure you that isolating the decoder brings UGE gains in detail, improves sound stage enourmously, adds speed and control to all frequencies and there is a big reduction in noise.
It seems to me that there is a lot less skipping.... better control of the servo action....
In big chorus pieces (Mozart - Requiem "Rex tremendae"), I can now perfectly distinguish the several voice arrangements with a lot less mixture.
In heavy rock (Steve Vay), the guitar has all the needed "edge".
Female voices (Liza Ekdall, Tori Amos, Laurie Anderson, Clã) are now sweet and very detailed.
Now this player really sings... I am rediscovering my CD collection.
I wonder what should it sound like with an overall spower "treatment"
Finally I have a High End CDP.... Took me less than 500€ and I gained loads of knowledge.
Ricardo
From my listening sessions during this weekend, I can assure you that isolating the decoder brings UGE gains in detail, improves sound stage enourmously, adds speed and control to all frequencies and there is a big reduction in noise.
It seems to me that there is a lot less skipping.... better control of the servo action....
In big chorus pieces (Mozart - Requiem "Rex tremendae"), I can now perfectly distinguish the several voice arrangements with a lot less mixture.
In heavy rock (Steve Vay), the guitar has all the needed "edge".
Female voices (Liza Ekdall, Tori Amos, Laurie Anderson, Clã) are now sweet and very detailed.
Now this player really sings... I am rediscovering my CD collection.
I wonder what should it sound like with an overall spower "treatment"
Finally I have a High End CDP.... Took me less than 500€ and I gained loads of knowledge.
Ricardo
I enjoyed your latest review Ricardo, but I can't help wondering if this final talk is really the end....
I treated my CD63 to a new interconnect I knocked up yesterday (took aaages).
Oh, it's good, beating my previous copper one and maybe even beating these solid cu connectors & Kimber 4TC we tried!
I treated my CD63 to a new interconnect I knocked up yesterday (took aaages).
Oh, it's good, beating my previous copper one and maybe even beating these solid cu connectors & Kimber 4TC we tried!
Attachments
My power amps also got a treat - to replace a p00py little brown Elna coupling cap - a Mundorf Supreme
Worth every penny these babies, I might even try to afford some more for my CD63.
I also put a Lee prototype power cable on my CD player, which gave a pleasing boost to detail, space, naturalness and bass quality.
Simon
Worth every penny these babies, I might even try to afford some more for my CD63.
I also put a Lee prototype power cable on my CD player, which gave a pleasing boost to detail, space, naturalness and bass quality.
Simon
Attachments
Not really.... it is almost on par with the TT in relation with soundstage size but the TT is so much more silent and able to produce those wonderfull midrange and high frequencies that are still somehow veiled in the CDP..... maybe with some spowers things will changeAndre Visser said:
I guess it must be FAR better than the turntable by now.
SimontY said:I enjoyed your latest review Ricardo, but I can't help wondering if this final talk is really the end....
I treated my CD63 to a new interconnect I knocked up yesterday (took aaages).
Oh, it's good, beating my previous copper one and maybe even beating these solid cu connectors & Kimber 4TC we tried!
Hi Simon
This is the end of my last mod.... not the end of all mods.... After all this knowledge retrieval, I got really hooked.
I just can not stop.... I believe my next mod will be upgrading the meridian 101 with some +-15v spowers.
Next I will build a jfet phono RIAA as per Salas design.
I also want to build a DIY Armageddon for my TT.
And last but not least, my speakers need a revamp.....
So much to do and so little time (€€€)
I am glad to know you are not idling also, Power cables can really make a big difference.
Two weeks ago I installed a dedicated Supra low rad 2.5mm2 power cable in my power amp and I am still recovering from the surprise..... Faster transients, lower distortion, bigger soundstage..... amazing
Regards
Ricardo
Hi chaps,
This powerpoint file caught my eye.
Seems to answer a few questions some of us had about grounding around the DAC.
Note that supply currents for SM5872BS are:
Digital - 15mA
Clock - 3ma
Analog - 1ma
Seems to back up what Illimz was saying (before you lot scared him off!).
Nice to have it explained in a Sesame Street fashion with lots of diagrams.
Glenn
Edit: It's from Analog Devices, who know a thing or two about DACs.
This powerpoint file caught my eye.
Seems to answer a few questions some of us had about grounding around the DAC.
Note that supply currents for SM5872BS are:
Digital - 15mA
Clock - 3ma
Analog - 1ma
Seems to back up what Illimz was saying (before you lot scared him off!).
Nice to have it explained in a Sesame Street fashion with lots of diagrams.
Glenn
Edit: It's from Analog Devices, who know a thing or two about DACs.