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Old 17th May 2006, 10:46 AM   #11
Sushii is offline Sushii  Hong Kong
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Detail view of decoder board #2
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Old 17th May 2006, 10:47 AM   #12
Sushii is offline Sushii  Hong Kong
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Detail view of the decoder board #3
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Old 17th May 2006, 10:55 AM   #13
Sushii is offline Sushii  Hong Kong
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Also, I have removed the bottom cover all together and find out the sound is much cleaner without the bottom cover, especially in the low frequency area
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Old 17th May 2006, 09:41 PM   #14
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Default Philips CD101

hi Sushii,

looks cool without bottom board, but you have some serious suspension tweaks there as well. always used with bottom board on myself, but supported on oak cones. this is quite audibly superior to standard.will try your way as well though.

also try to replace opamps on decoder board with better, should give a freshly laundered bass. try something from AD.

great player, had mine from new years ago.

Tony
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Old 18th May 2006, 01:22 AM   #15
Sushii is offline Sushii  Hong Kong
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The feet under cd player is bouncy balls cut in half, then it is copper then aluminum, then it is a roller block clone that I made.


After testing with different ways of supporting cd player, i find this settings suits CD-101 the best.
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Old 18th May 2006, 04:45 PM   #16
jives11 is offline jives11  Europe
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I don't have this model but have the simiilar CD104. The two biggest things for me were :

1) I removed the DC blocking capcitors . My preamp is decoupled anyay.

2) I replaced the supply caps for the +12/-12 supplies to the opamps with cerafines

the caps for 1) and 2) are the four blue caps closest to the opamps.

I have kept the old NE5532's as I like their sound
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Old 19th May 2006, 06:35 AM   #17
Sushii is offline Sushii  Hong Kong
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Hello

Thanks for your advise however there are only 3 pcs of blue caps around the opamps...

I am guessing the 2 beside the opa are the supply caps? I am saying the left most circled ones.
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Old 19th May 2006, 09:30 AM   #18
jives11 is offline jives11  Europe
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Quote:
Originally posted by Sushii
Hello

Thanks for your advise however there are only 3 pcs of blue caps around the opamps...

I am guessing the 2 beside the opa are the supply caps? I am saying the left most circled ones.

Hard to say without the schematics. It should be possible to trace back from the RCA sockets to see which caps are in the signal path. These are worth replacing with wire links , but if your pre-amp or amp is DC coupled then this is not such a good idea. The safe solution would be to use Bblackgate bipolar caps.

The Opamp supplies are pins 4 & 8 of the NE5532. I would expect to find +/- 12 v supplies with some local caps and some ceramic bypasses). These electrolytics would be good to replace.
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Old 22nd May 2006, 01:49 AM   #19
Sushii is offline Sushii  Hong Kong
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Change the caps from stock Philips cap to ROE caps, with bigger capacitance, 220uf from 47uf. The change in resolution, extension and deep bass is tremendous.
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Old 22nd May 2006, 04:29 AM   #20
banana is offline banana  Hong Kong
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Opamp with similar characteristic to 5532, you can try MC33078 or OPA2227.

Also, there should be a chain of bypass cap alongside pin 12, 13, 14, 18, 19, 20, 21, 23, 24, 25. You might try to change them to MKP type, but keep their cap value.
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