| borges |
Hi,
I have an old Mission DAD5 that uses Philips Bitstream conversion. Now I'd like to put my own DA board into it.
How do I modify this player to get to the internal digital signals? Preferably, I'd get in before the S/PDIF generation.
Hope this player has a decent crystal oscillator and power supplies that I can hack into.
Any schematics out there?
Greetings,
Børge |
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| whats gan on |
| hi i have one here if i was you i would change all the diodes for 11dq 10 then add a 5 volt super reg and change the opamps you will be very suprised how much better the cd player will sound |
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| rfbrw |
| quote: | Originally posted by borges
Hi,
I have an old Mission DAD5 that uses Philips Bitstream conversion. Now I'd like to put my own DA board into it.
How do I modify this player to get to the internal digital signals? Preferably, I'd get in before the S/PDIF generation.
Hope this player has a decent crystal oscillator and power supplies that I can hack into.
Any schematics out there?
Greetings,
Børge |
A little more info on the chipset. |
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| whats gan on |
| a little bit of soap will wash away the lips stick from my face |
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| rfbrw |
| quote: | Originally posted by whats gan on
a little bit of soap will wash away the lips stick from my face |
Your cross dressing issues are no concern of ours. |
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| whats gan on |
| it is a song never heard of it george lolhttp://www.showaddywaddy.net/ |
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| Gasho |
I think that Beatstream conversion is not a problem in sound of your player.
Poor Clock section, simple and noisy power supply , generic analog section are the problems.
What DAC chipset uses DAD5? |
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| whats gan on |
| saa7321 dac saa7310 decoder |
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| Fin |
| quote: | Originally posted by whats gan on
saa7321 dac saa7310 decoder |
Same chips as Philips CD618/624/634/840/850 and similar to Rotel RCD865/965. QED Digit also used that DAC chip.
It is the first generation bitstream with the filter, dac, and analogue stage in one chip. The chip can be used just as a filter and the final internal opamps can be bypassed....but not the ones used for I/V. It has five 5V power pins.
The decoder is fairly common - found in many CDPs of that time. It is easy to access the I2S between the two chips.....but it would be nice to see someone having a real go at making something with 7321 sound better instead of just bypassing it completely.
Jean-Paul likes this chip and thinks it compares well to some of his TDA1541 machines. KWY hates it mainly because you cannot bypass all of the onboard opamps. |
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| whats gan on |
THE MISSION DAD5
with the opamps replaced with AD826an schottky diodes 11dq10
and pure silver wire bypass the two nikon bp caps creates a lot more life to my player it is so damn musical now with lots more detail. has any one powered the opamps on there own i would love to do that there is a -15 vot reg and a 5v + which i think powers the opamps |
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| Fin |
| quote: | Originally posted by whats gan on
THE MISSION DAD5
with the opamps replaced with AD826an schottky diodes 11dq10
and pure silver wire bypass the two nikon bp caps creates a lot more life to my player it is so damn musical now with lots more detail. has any one powered the opamps on there own i would love to do that there is a -15 vot reg and a 5v + which i think powers the opamps |
I haven't seen the circuit/schematics of the DAD5....but I would think that the +5V reg powers the DAC chip....and there should be a +15V reg and -15V reg for the opamps. |
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| whats gan on |
hi mate there is only 0ne fixed 7805 and one 7915
thank you for your reply |
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| whats gan on |
| just replaced 2 little surface mount caps with siver mica in the clock of my dad 5 and the sound is fast clean just like what would happen when you fit a trichord clock 4 any one know why they have made a huge improvement |
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| Fin |
| quote: | Originally posted by whats gan on
just replaced 2 little surface mount caps with siver mica in the clock of my dad 5 and the sound is fast clean just like what would happen when you fit a trichord clock 4 any one know why they have made a huge improvement |
Have you seen this thread?
Silver Micas for Clock in CD40 |
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