Marantz CD273

[N101N]

rfbrw,
under the influence of heavy commercial indoctrination, it is almost unthinkable that oversampling can do more harm than good, right?

 

[rfbrw]

Whatever.

 

[Lampie519]

As mentioned before... if done correctly it can be an advantage.

Not everything the "industry" invents is bad...

 

[rfbrw]

No over sampling (a bypass)

There are already plenty of true believers to help you with that.

 

[thirteeneast]

??? You asked what it was.

 

[rfbrw]

Given that you can't throw anything in any direction on the net without hitting some POS NOS modification I'm surprised that anyone would feel the need to put someone up to do it.

 

[Lampie519]

The positive thing about this simple mod that it can be reversed easily. So just try and decide for yourself! No need for anyones opinion.

 

[rfbrw]

I did, somewhere around the turn of the century.

 

[N101N]

Not everything the "industry" invents is bad...

... but manufacturing ease and cost weigh more than product quality.

 

[Lampie519]

Maybe at the company you are working for. Cost no object companies do exist. But are you a customer of any of these companies?
I guess not !

 

[N101N]

Maybe you should embrace the modern cheaply manufactured heavy oversampling technique.

 

[Lampie519]

I ambrace it if it is done correctly ! So , you have one that is not cheap or do have none at all ? I guess the second as you are not willing to spend money on it even if it was done correctly. But you already “know” that this unit does not exists as you are “allknowing” in these matters.

 

[N101N]

Digital amplitudes must be small. Unlike contemporary engineers, the engineers at Philips understood that back in the day.

 

[thirteeneast]

I ambrace it if it is done correctly ! So , you have one that is not cheap or do have none at all ? I guess the second as you are not willing to spend money on it even if it was done correctly. But you already “know” that this unit does not exists as you are “allknowing” in these matters.

Hi, finally tried today on an old Philips CD373 that I have and although its early days, id say it did indeed sound better and more defined/spacious than simply using the coax output into my DAC

Once my clock arrives for the Marantz ill fit the clock then try this after a few listens.

Thanks for the help.

 

[thirteeneast]

A little help please,

The clock I can only get it to work using a 9v battery?
When I connected to the 10v raw voltage supply of from a separate 7809 toc error occurs, but from a 9v battery it's fine.

Any ideas?

I've a feeling it's the 0v causing my lack of sleep.

 

[Lampie519]

Long wires (can create high resistive signal path for HF so decoupling is key here) ? Is there a galvanic insulation between the power suppplies?

 

[N101N]

A voltage regulator is an oscillator too. Now you`ve got two powerful oscillators fighting each other. What a spectacle!

 

[thirteeneast]

Finally got the time to take another look at this today and re-fit the TCXO.
Worked straight away, no TOC error Might have had a bad joint on something before.
Love this little thing.

 

[thirteeneast]

The TCXO

 

[thirteeneast]

Found a nice new toroidal and made some pcb's with bridge rectifiers and 5v regulators for supply to dac, clock, saa7220 and 7210
Is it worth installing the toridial as its tight but possible or just stick with powering the regs from the current supply?

is it worth the effort for what will be gained if anything?