Thanks for all the opions. Ergo, I would like to start slowly as i have very little electronic knowledge and don't want to do some serious redesigning when I have little knowledge of the current design or actualluy any knowledge. Same go for Elso's clock idea. Just too technical to fast at the moment. 
That implies in it self that they are the most worth while ones.The bigger the risk(for me anyway) the bigger the reward.
Air, I will have look about that bitumen, mabe it helps, maybe it dont especially on the drive cause there is rather little space i think.
Air I also saw that LC audio just released a upgrade kit for you philips,might be worth a look.Doesnt seem like I can change to much at the moment as they use pretty good stuff already... to bad!
Elso,you said to change the opamps but then that I should keep the BB OPA 2604. Have been reading a bit and there are a lot more newer ones available. Why should I keep it then?
That implies in it self that they are the most worth while ones.The bigger the risk(for me anyway) the bigger the reward.
Air, I will have look about that bitumen, mabe it helps, maybe it dont especially on the drive cause there is rather little space i think.
Air I also saw that LC audio just released a upgrade kit for you philips,might be worth a look.Doesnt seem like I can change to much at the moment as they use pretty good stuff already... to bad!
Elso,you said to change the opamps but then that I should keep the BB OPA 2604. Have been reading a bit and there are a lot more newer ones available. Why should I keep it then?
OPA2604
Because I like them as IV converters, though I am using the TDA1543. Tried almost every conceivable opamp in that position.noogie said:
Uhm😱 , what does IV converter mean?
Does it have that function in my machine? What is the purpose of the other opamp OPA 2132 ?
There are if I remember correctly 4xOPA 2604 and 2xOPA 2132...Which ones can be changed then?
Does it have that function in my machine? What is the purpose of the other opamp OPA 2132 ?
There are if I remember correctly 4xOPA 2604 and 2xOPA 2132...Which ones can be changed then?
Opamps in Sony CDP XA 50 ES
IV converter is current to voltage converter (spelled as IV-conversion in the servicemanual).
The other opamps are for balanced to single ended conversion and for active low pass filtering/ output buffer and DC servo control.
I would not poke around in this machine without a servicemanual.
noogie said:
IV converter is current to voltage converter (spelled as IV-conversion in the servicemanual).
The other opamps are for balanced to single ended conversion and for active low pass filtering/ output buffer and DC servo control.
I would not poke around in this machine without a servicemanual.
I have no fear cause Elso is near😀
Will get that manual from you soon...
Am into Graphics by the way Elso.
You were not here a few weeks ago doing some photoshoots in Helsinki?
That was a Dutch artist.
Will get that manual from you soon...
Am into Graphics by the way Elso.
You were not here a few weeks ago doing some photoshoots in Helsinki?
That was a Dutch artist.
ergo!
As owner of the same XB930 would ask you to describe or show (circuits, pictures) the real solution with the best results.
I would go balanced landing in something like Pass' BOSOZ, maybe with a balanced poweramp too.
Would be fine eliminating the whole I/V - opamp chain. I tend to believe in your presented theory.
Laci
As owner of the same XB930 would ask you to describe or show (circuits, pictures) the real solution with the best results.
I would go balanced landing in something like Pass' BOSOZ, maybe with a balanced poweramp too.
Would be fine eliminating the whole I/V - opamp chain. I tend to believe in your presented theory.
Laci
ljozsef and others,
following is the implementation of Borbely Super Buffer in my Sony CDP XB-930
If you'll try to do the same take a close look how the signal is taken off the main PCB inside the player. I hope the image is good enough.... I had to use a two channel scope to get the phases of the signal right 🙂
Ergo
following is the implementation of Borbely Super Buffer in my Sony CDP XB-930
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
If you'll try to do the same take a close look how the signal is taken off the main PCB inside the player. I hope the image is good enough.... I had to use a two channel scope to get the phases of the signal right 🙂
Ergo
Time to revive this thread a little. I have changed the powercord. Very worth while upgrade. Warmer sounding and lower noise floor. Damping did not really add or worsen anything ...although audionets idea of filling the bottom part with granite seems interesting though, have look yourselfs at www.audionet.de . Hopefully early next month order my clock from Elso. Will probably take little time to build that...
In the meantime i have reading a lot about opamps and was wondering if it is a good idea to exchange those OPA2604's with AD8065?
In the meantime i have reading a lot about opamps and was wondering if it is a good idea to exchange those OPA2604's with AD8065?
personally, i like the opa2604 in this space.
by the way, any of you 779Es (or similar model) owners come up with a reasonable solution for the synched, two clock problem?
mlloyd1
by the way, any of you 779Es (or similar model) owners come up with a reasonable solution for the synched, two clock problem?
mlloyd1
Thanks, lot of other people have stated the same things about the OPA2604 as IV converter.Might just save some money then.
I also have been trying to look bit more into the two clock system and as been stated here some do only modify the main clock. Swoboba is the only one i know of the replaces both clocks but how that done is open to speculation...and if it is really worth while is the other...
I also have been trying to look bit more into the two clock system and as been stated here some do only modify the main clock. Swoboba is the only one i know of the replaces both clocks but how that done is open to speculation...and if it is really worth while is the other...
Two Clocks in the Sony
Hi Noogie,
It MUST be worthwhile to replace both clocks as I only replaced the 16.9344 MHz clock in my Sony and got MUCH better sound. The 45.1584 MHz clock is used for Sony's Delta-Sigma DAC and this DAC should benefit from that measure.
I used the Sony only as a transport as I did not like the built in Sony DAC and found the AD1864 better. Later I did build in the AD1865 and eventually went for the TDA1543.
The AD1864 and the AD1865 do work with the digital filter CXD1244 in my Sony CDP-X33ES.
😎
noogie said:
Hi Noogie,
It MUST be worthwhile to replace both clocks as I only replaced the 16.9344 MHz clock in my Sony and got MUCH better sound. The 45.1584 MHz clock is used for Sony's Delta-Sigma DAC and this DAC should benefit from that measure.
I used the Sony only as a transport as I did not like the built in Sony DAC and found the AD1864 better. Later I did build in the AD1865 and eventually went for the TDA1543.
The AD1864 and the AD1865 do work with the digital filter CXD1244 in my Sony CDP-X33ES.
😎
I believe it Elso, but that swoboda clockupgrade is rather expensive and no else seems to have found a diy solution.
For interest sake why don't you like the Sony DAC?
For interest sake why don't you like the Sony DAC?
Sound of Sony DAC
Hi Noogie,
I did not like the sound of the old CXD2552Q in my old Sony as it emphasizes pulses in the sound. Every percussion hit stands out.
Maybe the CXD2562Q in your newer Sony is better.😉
Hi Noogie,
I did not like the sound of the old CXD2552Q in my old Sony as it emphasizes pulses in the sound. Every percussion hit stands out.
Maybe the CXD2562Q in your newer Sony is better.😉
noogie, I would not be so concerned about the 16MHz clock. This clock is derived from what is basicly oscillator that is running 16MHz but is also energized by the pulses from 45MHz clock. The 45MHz clock is the one responsible for the clock signal to DAC. Also if you upgrade the 45MHz clock you'll be influencing the 16MHz to better jitter spec just as well.
The clock scheme for the transport as is is guite ok. But this is an educated guess as I have not tried to replace it.
As I have said before, the biggest problems in these olayers is not the clock running transport but the analog stage and athe current pulse DAC...
Ergo
The clock scheme for the transport as is is guite ok. But this is an educated guess as I have not tried to replace it.
As I have said before, the biggest problems in these olayers is not the clock running transport but the analog stage and athe current pulse DAC...
Ergo
ergo said:
Nice work Elso !
One remark: Try to twist those wires that belong together, ie input signal and input ground.
It may make a subtle difference, but you know, all these subtle things together...........
cheers
Hi!
As I recently bought an cdp-xa50es, I am trying to wake this thread again 😀
Have not yet decided what to do with it, I found some interesting stuff at the LCAudio homepage. They have a guide to installing XClock and Zapfilter in this player, and they ONLY change the 45mhz clock!
XCLock + Zapfilter: http://213.237.39.2/com/index.php?page=44
In this article, they install the Zapfilter after the Current Pulse D/A´s.
However, I also found another article, on how to bypass the Current Pulse D/A!
Bypass: http://213.237.39.2/com/index.php?page=68
Since this is also what ergo mentions in this thread, it seems like a good start to bypass this Current Pulse D/A and build an new analog stage. I am thinking about an op-amp based output. However, what lowpass filtering is necessary to do if I take the balanced signal after the dac, just as LCAudio did?
As I recently bought an cdp-xa50es, I am trying to wake this thread again 😀
Have not yet decided what to do with it, I found some interesting stuff at the LCAudio homepage. They have a guide to installing XClock and Zapfilter in this player, and they ONLY change the 45mhz clock!
XCLock + Zapfilter: http://213.237.39.2/com/index.php?page=44
In this article, they install the Zapfilter after the Current Pulse D/A´s.
However, I also found another article, on how to bypass the Current Pulse D/A!
Bypass: http://213.237.39.2/com/index.php?page=68
Since this is also what ergo mentions in this thread, it seems like a good start to bypass this Current Pulse D/A and build an new analog stage. I am thinking about an op-amp based output. However, what lowpass filtering is necessary to do if I take the balanced signal after the dac, just as LCAudio did?
XA50 <-> XA30
Hi,
One question: Are there basic differencies between these two players regarding the mods mentioned in this thread?
Anticipated thanks,
Laci
Hi,
One question: Are there basic differencies between these two players regarding the mods mentioned in this thread?
Anticipated thanks,
Laci
Hi,
You could have a look on a thread I started a few months ago.
Sony CDP output stage.
I will continue this thread soon, a few new mods, but not much time until mid/end january.
Cheers.
You could have a look on a thread I started a few months ago.
Sony CDP output stage.
I will continue this thread soon, a few new mods, but not much time until mid/end january.
Cheers.
- Status
- Not open for further replies.