Just a quick thread to share my happyness !
I just bought this wonderful (and working) Philips CD101 .
I plan to use it as a transport and plug it to a DAC via the I2S output.
My question is :
What do you think is the best solution :
Build a great case for the CDM1 transport or leave it in its original case ( I love the its design).
My first idea was to take the transport off its case but it is really looking great and moreover the original case is so well build and heavy I think it will be fine.
Edit : By the way guess how much I paid for it ? 11,4 euros !!!
I just bought this wonderful (and working) Philips CD101 .
I plan to use it as a transport and plug it to a DAC via the I2S output.
My question is :
What do you think is the best solution :
Build a great case for the CDM1 transport or leave it in its original case ( I love the its design).
My first idea was to take the transport off its case but it is really looking great and moreover the original case is so well build and heavy I think it will be fine.
Edit : By the way guess how much I paid for it ? 11,4 euros !!!
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There's no way you could make a case that cool at home; there's even a graph of its frequency response. Leave it as it is!
Actually - you'll probably find there a several boards wired together inside. Given its age, these get a bit twitchy if you start playing inside/ moving the guts to a new case. It might never be the same again, so If it works, just enjoy it 🙂
Actually - you'll probably find there a several boards wired together inside. Given its age, these get a bit twitchy if you start playing inside/ moving the guts to a new case. It might never be the same again, so If it works, just enjoy it 🙂
That's right it doesn't exist but there are solutions.
See here :
http://www.diyaudio.com/forums/showthread.php?s=&threadid=22133&perpage=10&highlight=&pagenumber=4
And the cd-304 mkII use a CDM1 and a SAA7210 where you can take the I2S from so it means you can get I2S out of CDM1.
It will not be easy but this will be worth trying it to be able to plug the best ever made philips transport (CDM1) to a great DAC !
See here :
http://www.diyaudio.com/forums/showthread.php?s=&threadid=22133&perpage=10&highlight=&pagenumber=4
And the cd-304 mkII use a CDM1 and a SAA7210 where you can take the I2S from so it means you can get I2S out of CDM1.
It will not be easy but this will be worth trying it to be able to plug the best ever made philips transport (CDM1) to a great DAC !
cedus said:
But you don't have a CD304 MK2, you a have CD101 and that may well mean the SAA70x0/TDA1540P chipset and that is something completely different.
OK !
After some digging into the forum and into the web here is what I found :
CD101 uses SAA7000 / 7010 / 7020 / 7030 chips with 2xTDA1540 (14 bits DAC)
After all my research I2S is not possible
BUT...
It seems possible to interface SAA7000 and TDA1541A
SAA7000 can output 16 bits on left channel and right channel (DLCF and DRCF) in offset binary format.
On the other hand TDA1541A accepts dual channel input (pin 3 and 4)
in offset binary format.
Everything seems great. Just have to try and hope the formats are the same ! I am betting they are because of one sentence in the TDA 1541A Specs :
"The flexible input data format allows easy interfacing with signal processing chips such as interpolation filters, error correction circuits, pulse code modulation adaptors and audio signal processors"
I am sure they made it compatible with their earlier circuits 🙂 It's good to hope !
Apparently Happy Ears did succeed last year (see the url I posted earlier)
What do you think of that ?
After some digging into the forum and into the web here is what I found :
CD101 uses SAA7000 / 7010 / 7020 / 7030 chips with 2xTDA1540 (14 bits DAC)
After all my research I2S is not possible
BUT...
It seems possible to interface SAA7000 and TDA1541A
SAA7000 can output 16 bits on left channel and right channel (DLCF and DRCF) in offset binary format.
On the other hand TDA1541A accepts dual channel input (pin 3 and 4)
in offset binary format.
Everything seems great. Just have to try and hope the formats are the same ! I am betting they are because of one sentence in the TDA 1541A Specs :
"The flexible input data format allows easy interfacing with signal processing chips such as interpolation filters, error correction circuits, pulse code modulation adaptors and audio signal processors"
I am sure they made it compatible with their earlier circuits 🙂 It's good to hope !
Apparently Happy Ears did succeed last year (see the url I posted earlier)
What do you think of that ?
So let's try it !
My only fear was that the format would not have been in offset binary format !
Apparently according to your post it is.
I will try that and report here !
Anyway thank you all for your help
Last question : do you think the path between SAA7000 and TDA 1541A should be very short (so it means internal DAC) or it can be longer (external) ?
My only fear was that the format would not have been in offset binary format !
Apparently according to your post it is.
I will try that and report here !
Anyway thank you all for your help
Last question : do you think the path between SAA7000 and TDA 1541A should be very short (so it means internal DAC) or it can be longer (external) ?
You could send the signals to an external TDA1541A via a buffer but if there is enough space inside I wouldn't bother.
The CD 101 is just too beautiful I could not dare touching it and the sounds is quite impressive. So I decided to leave it like that for the moment.
But my project of building a great transport around the CDM1 is not dead.
I bought a Marantz CD-54 for nothing which is working fine. This weight a ton (amazing everything is in metal) and is rather ugly (compared to CD 101). So no worry to take it apart !
Here are my operations plan to have a wonderful cd player :
1. Mod the case by
a. changing the cover sheet with a top loading aluminium sheet (at the moment it is a tray).
a'. of course taking off the tray 😉
b. Change the front panel (keeping the current led indicators) and the buttons (using something fancier)
c. Change the Cinch by good ones.
d. Perhaps make the case a little bit biger
I will use the great explanation published at Decibel Dungeon for the CD723
2. changing all the caps and the bridge of the PSU unit because they are almost twenty years old.
3. building a new DAC around 4 TDA 1541A using 2 paralleled DAC for each channel. (I think of going step by step to have a better understanding of how the sound can be improved ) which means :
a. 1 TDA 1541A using the separate channel input settings
b. 2 TDA 1541A (1 for each channel)
c. 2 x 2 TDA 1541A (2 paralleled for each channel)
4. building an output stage with OPA627
5. building an ouput stage using valves (with the possibility to switch between the two options)
6. make some damping if necessary
Here are all my plans.
I hope I will be finished before next summer. I will report here regularly.
If someone has the service manual for the CD-54 this will be great ! Otherwise I think this will be OK because I have the CD 101 service manual and everything looks very very similar (but that's normal 😉 )except a couple of PCB.
To be continued...
But my project of building a great transport around the CDM1 is not dead.
I bought a Marantz CD-54 for nothing which is working fine. This weight a ton (amazing everything is in metal) and is rather ugly (compared to CD 101). So no worry to take it apart !
Here are my operations plan to have a wonderful cd player :
1. Mod the case by
a. changing the cover sheet with a top loading aluminium sheet (at the moment it is a tray).
a'. of course taking off the tray 😉
b. Change the front panel (keeping the current led indicators) and the buttons (using something fancier)
c. Change the Cinch by good ones.
d. Perhaps make the case a little bit biger
I will use the great explanation published at Decibel Dungeon for the CD723
2. changing all the caps and the bridge of the PSU unit because they are almost twenty years old.
3. building a new DAC around 4 TDA 1541A using 2 paralleled DAC for each channel. (I think of going step by step to have a better understanding of how the sound can be improved ) which means :
a. 1 TDA 1541A using the separate channel input settings
b. 2 TDA 1541A (1 for each channel)
c. 2 x 2 TDA 1541A (2 paralleled for each channel)
4. building an output stage with OPA627
5. building an ouput stage using valves (with the possibility to switch between the two options)
6. make some damping if necessary
Here are all my plans.
I hope I will be finished before next summer. I will report here regularly.
If someone has the service manual for the CD-54 this will be great ! Otherwise I think this will be OK because I have the CD 101 service manual and everything looks very very similar (but that's normal 😉 )except a couple of PCB.
To be continued...
Cedus,
Can you send me that service manual ?!
I have a CD100 thats a little bit sick, but not much
Thanks,
Brian
Can you send me that service manual ?!
I have a CD100 thats a little bit sick, but not much
Thanks,
Brian
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