How do a quick & dirty non os in a CD650

[Bernhard]

Hi,

for further spectrum analysis measurements I like to turn a CD650 (SAA7220) to non oversampling.

How can that be done as simple as possible without installing low jitter clock boards ?

Have you Searched ?

Oh yes !


Bernhard

 

[zygibajt]

How can that be done as simple as possible without installing low jitter clock boards ?

What has low jitter clock to do with non-os?

Please download the attachment with proper ,easy and quick procedure.I got them from somebody's website,but I don't remember the link.Sorry to the website owner,I hope he doesn't mind,it's just a raw text.

Bartek

 

[Elso Kwak]

Hi,

for further spectrum analysis measurements I like to turn a CD650 (SAA7220) to non oversampling.

How can that be done as simple as possible without installing low jitter clock boards ?



Oh yes !


Bernhard

Hi, Search for Marco Amboldi in Italy. Currently his website is down.

😱

 

[Bernhard]

Re: Re: How do a quick & dirty non os in a CD650

😱

This one ?

http://members.xoom.virgilio.it/hi_fi/

I always get a unsupported html version error message

😱

 

[Bernhard]

What has low jitter clock to do with non-os?

Takes more time...

Thanks for the file,

Bernhard

 

[Elso Kwak]

Re: Re: Re: How do a quick & dirty non os in a CD650

This one ?

http://members.xoom.virgilio.it/hi_fi/

I always get a unsupported html version error message

😱

Yes, Or better:
http://xoomer.virgilio.it/hi_fi/com.htm

😎

 

[TDA1540]

Bernhard,

after you have rerouted the signals(use resistors),you can mute the 7220 (audible improvement).There is also the resistor between 5V and bitclock(IIRC) to tinker with.


TDA

 

[Bernhard]

It was very easy, I used wires ,only 1cm to 1,5 cm long, crossing the old tracks.

Just the muting does not work, maybe because I disconnected the pin 23 of SAA7220 from what it was connected before.

Also I have no 7210 but N4804A inside.

Sounds good, don't know if better, but first it strongly depends on the dac chip and second the distortions are higher, compared to os.


Please see S1 thread for details / spectrum.

 

[Bernhard]

Bernhard,

after you have rerouted the signals(use resistors),you can mute the 7220 (audible improvement).There is also the resistor between 5V and bitclock(IIRC) to tinker with.


TDA

Why resistors ? What values ??

 

[Bernhard]

Re: Re: Re: Re: How do a quick & dirty non os in a CD650

Yes, Or better:
http://xoomer.virgilio.it/hi_fi/com.htm

😎

I have AOL8.0 and can not open that website

 

[zygibajt]

Bernhard

Is your CD 304MKII equipped with SAA7210 chip?
I have heard that it is suppose to have this chip ,but mine has some other,not Philips chip in the place.

Bartek

 

[Bernhard]

Bernhard

Is your CD 304MKII equipped with SAA7210 chip?
I have heard that it is suppose to have this chip ,but mine has some other,not Philips chip in the place.

Bartek

Yes, it is 7210. But The CD304mkII refuse to read the CD rom with the -60dB signal 🙁

So I can not use this player with spectrum analyzer.

The decoding chip in my CD650 has same pins connected to SAA7220 as should have SAA7210.

 

[Bernhard]

Non os sounds very lively due to high distortions

 

[Elso Kwak]

Re: Re: Re: Re: Re: How do a quick & dirty non os in a CD650

I have AOL8.0 and can not open that website

I have no problem with Opera or IE

 

[Bernhard]

Ah, with IE it works 🙂

 

[guido]

Also I have no 7210 but N4804A inside.

Mine also has that chip inside. Asked around here, nobody knows what it is. I heard somewhere (cant remember where) that it is more or less the same as 7210, but it has some bugs.

Never found them though, works fine for me.

Greetings,

 

[Bernhard]

Mine also has that chip inside. Asked around here, nobody knows what it is.

This one was brought to you by the

 

[Bernhard]

Non os with original analog filter.

Signal is -60dB 1 kHz.

44,1 kHz sidebands 38dB below signal.