reclocking cd80

Marcelinho · 20th November 2005, 03:05 PM

After practizising on a old sony, i have sufficient currage to take on my Marantz cd-80. I have still laying around a suitable Tent X0 module. Is there a improvement to be gained by directly clocking the servo and the tda1541A as well? Can this be done with one X0?

Any synchronising problems this way?

I saw some post that dividers were neccesary, but that was in NOS-mode. I don't want to go the NOS road. What will be the frequencies for those chips in that case.

Does the extra circuitry neccesary add as much jitter as only reclocking the SAA7220?

Does anybody have the schematics/layout for the PSU.

Elso Kwak · 20th November 2005, 07:03 PM

Quote:

Originally posted by Marcelinho
After practizising on a old sony, i have sufficient currage to take on my Marantz cd-80. I have still laying around a suitable Tent X0 module. Is there a improvement to be gained by directly clocking the servo and the tda1541A as well? Can this be done with one X0?

Any synchronising problems this way?

I saw some post that dividers were neccesary, but that was in NOS-mode. I don't want to go the NOS road. What will be the frequencies for those chips in that case.

Does the extra circuitry neccesary add as much jitter as only reclocking the SAA7220?

Does anybody have the schematics/layout for the PSU.

hi, I have the servicemanual email me through the forum.

Jocko Homo · 21st November 2005, 12:38 AM

Do not put the clock into the filter chip and take the outputs from it!

Run separate lines to everything.

Jocko

Elso Kwak · 21st November 2005, 08:36 AM

Quote:

Originally posted by Jocko Homo
Do not put the clock into the filter chip and take the outputs from it!

Run separate lines to everything.

Jocko

hi it does not help much

Marcelinho · 22nd November 2005, 02:44 AM

So no concensus about the sonic effects. Between the ears is also important. If you know it is less than perfect, it sounds accordingly.

http://www.earthcurrents.com/london-live/cd-jitter.pdf

This link adresses a phase synchronising issue. As a simple computerman i think that if i cut traces to clock-in, and feed the chips with one clock they are in fase and synchronised right?

Elso Kwak · 22nd November 2005, 06:04 AM

no there IS consencus, Jocko is right. But the effect is small and I am pulling his leg. Obsolete technology that CD80, soooooo old

Edit you read the date at that jitter document? Right 1993.....

Marcelinho · 22nd November 2005, 07:08 AM

Obsolete technology, yeah maybe. I have to find out myself (the hard way). didn't you?.
I can always use it as transport if it last that long. No old technology mechanicaly.

Elso Kwak · 22nd November 2005, 12:34 PM

Quote:

Originally posted by Marcelinho
Obsolete technology, yeah maybe. I have to find out myself (the hard way). didn't you?.
I can always use it as transport if it last that long. No old technology mechanicaly.

Servos and DSP are ooold

Jocko Homo · 22nd November 2005, 04:01 PM

Elso, has your brain turned to rot from all those chat rooms you are hanging out in?

I perused the document........seems like someone else has pretty much the same ideas that I have, and for about the same period of time. So what is wrong with it??

I know......he must be a clock monger!!!!! Horrors! [joke]

BTW, I have two CD-80s in use. May be old, but not as old as you!

So there...........

Jocko

Marcelinho · 22nd November 2005, 04:36 PM

Still sounds good, great bass unmodded. My ears will be the final judge and not what's in between them i hope.
Not much to mod about new machines. To much smd in there. For the lesser skilled (me) a take it or leave it machine.

Did you receive my mail ?

20th November 2005, 03:05 PM	#1
Marcelinho diyAudio Member Join Date: Oct 2005	reclocking cd80 After practizising on a old sony, i have sufficient currage to take on my Marantz cd-80. I have still laying around a suitable Tent X0 module. Is there a improvement to be gained by directly clocking the servo and the tda1541A as well? Can this be done with one X0? Any synchronising problems this way? I saw some post that dividers were neccesary, but that was in NOS-mode. I don't want to go the NOS road. What will be the frequencies for those chips in that case. Does the extra circuitry neccesary add as much jitter as only reclocking the SAA7220? Does anybody have the schematics/layout for the PSU.

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21st November 2005, 12:38 AM	#3
Jocko Homo Banned Join Date: Feb 2002 Location: As far from the NOSsers as possible	Do not put the clock into the filter chip and take the outputs from it! Run separate lines to everything. Jocko

22nd November 2005, 02:44 AM	#5
Marcelinho diyAudio Member Join Date: Oct 2005	So no concensus about the sonic effects. Between the ears is also important. If you know it is less than perfect, it sounds accordingly. http://www.earthcurrents.com/london-live/cd-jitter.pdf This link adresses a phase synchronising issue. As a simple computerman i think that if i cut traces to clock-in, and feed the chips with one clock they are in fase and synchronised right?

22nd November 2005, 06:04 AM	#6
Elso Kwak Banned Join Date: Dec 2001 Location: Zamboanga, City of Flowers, Mindanao	no there IS consencus, Jocko is right. But the effect is small and I am pulling his leg. Obsolete technology that CD80, soooooo old Edit you read the date at that jitter document? Right 1993.....

22nd November 2005, 07:08 AM	#7
Marcelinho diyAudio Member Join Date: Oct 2005	Obsolete technology, yeah maybe. I have to find out myself (the hard way). didn't you?. I can always use it as transport if it last that long. No old technology mechanicaly.

22nd November 2005, 04:01 PM	#9
Jocko Homo Banned Join Date: Feb 2002 Location: As far from the NOSsers as possible	Elso, has your brain turned to rot from all those chat rooms you are hanging out in? I perused the document........seems like someone else has pretty much the same ideas that I have, and for about the same period of time. So what is wrong with it?? I know......he must be a clock monger!!!!! Horrors! [joke] BTW, I have two CD-80s in use. May be old, but not as old as you! So there........... Jocko

22nd November 2005, 04:36 PM	#10
Marcelinho diyAudio Member Join Date: Oct 2005	Still sounds good, great bass unmodded. My ears will be the final judge and not what's in between them i hope. Not much to mod about new machines. To much smd in there. For the lesser skilled (me) a take it or leave it machine. Did you receive my mail ?

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