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Old 1st December 2007, 06:21 PM   #8501
Thomo is offline Thomo  United Kingdom
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Quote:
Originally posted by RCruz

Hi Lee

As I bypassed every cap in the digital area and the results are very good, I was thinking to do the same.

What about using these Nichicons in paralel with some 3300uF Pana FC just to increase the speed ?

Can you comment on the wires please ? I really need some help here.

Regards

Ricardo

Fair enough. If you like the results, that is all that counts. I definitely wouldn't bypass Black Gates though.

As for wires, I use solid core copper ptfe insulated that I got real cheap off ebay. But I always find solid core copper taken from CAT5e Network cable very good, but solid core is fragile and can only be bent a few times before it snaps so it can be a pain.

Cheers,
Lee.
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Old 1st December 2007, 07:49 PM   #8502
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Hi there!
It's cold winter now, I'm back at my iron
Today I've changed the opamp's 470F/25V Elna RJH for my 220F BG, removed the headphone stuff and power lines.
The sound is better! I mean I was prepared to find some imporvement after some days in some areas, but it showed a big change right then!
The words are that it sounds less fat, better hold.
Is the headphone stuff pollute that much? Or the LM4562 does a far better work with the BG?
The back lid is off also but I don't think the ground chassis it is changes the sounds that much...
I'll do pictures tomorrow as I have stuff I may use to make some separate PSU for the 5Vs (I still have the single 7805...).

Matthieu
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Old 2nd December 2007, 02:15 PM   #8503
RCruz is offline RCruz  Switzerland
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Quote:
Originally posted by Malefoda
Today I've changed the opamp's 470F/25V Elna RJH for my 220F BG, removed the headphone stuff and power lines.
The sound is better! I mean I was prepared to find some imporvement after some days in some areas, but it showed a big change right then!
The words are that it sounds less fat, better hold.

The back lid is off also but I don't think the ground chassis it is changes the sounds that much...
I am almost ready to do the same mods... but still deciding if I should increase the cap to 470uF16V BGstd.

My doubt resides on the size.... can i fit the bigger 470uF in place of the ELNAS ???

But the main question is... Whenever I take the top lid off my player, the soundstage seems to become bigger with more space between the instruments.
Can this be real or the fact that I am looking to my work puts a "purple haze" in my mind ?

Note:
In my case. the top lid is heavilly padded with black automotive stuff hehe.

Ricardo
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Old 2nd December 2007, 02:17 PM   #8504
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I find it's almost beautiful and the best way to describe the change is to say that the BG (and headphones removal?) upgrade is like changing the opamps for better ones! And yes I did listened with the top lid off, have to do blind test later (mine is also heavily loaded...). If some exprienced guys here can give their pov...
And for your 470 vs 220 choice I did choose the 220 as I don't want to load too much my tiny CD53's PSU, wich is smaller than 63's.
Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

And finally my "CD53e Black Signature" (e for enhanced):
Click the image to open in full size.

Click the image to open in full size.
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Old 2nd December 2007, 02:32 PM   #8505
RCruz is offline RCruz  Switzerland
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Quote:
Originally posted by Malefoda
I find it's almost beautiful and tne best way to describe the change is to say that the BG (and hphones removal?) upgrade is like changing the opamps for better ones! And yes I did listened with the top lid off, have to do blind test later ( mine is also heavily loaded... ). And for your 470 vs 220 choice I did choose the 220 as I don't want to load too much my tiny CD53's PSU, wich is smaller than 63's.
Beautifull work you have there....
Maybe this is the responsabilty of the BG alone because I removed the phono circuit and did not sence a big change.

Big improvements can be obtained by upgrading the +5v digital reg and output cap.

Also use OsCon or Ruby MCZ in the +5v digital psu lines near the decoder and servos and replace the resistors by some inductors (Thank you Ray) and you will notice a BIG improvement. (Also replace the ceramics by 1% micas).

Can you please inform what type of wire you are using to bypass the output caps from opamps to output plugs?

Best regards

Ricardo
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Old 2nd December 2007, 04:46 PM   #8506
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Well all the Ray's list has already been done but the dedicated 5V rails, wich will be the next and last step for this player.
The wires are just solid copper wire used for big tx or some self.

Last word about the BG: maybe they give a bit harsh sound right now and need some burn-in?
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Old 2nd December 2007, 09:12 PM   #8507
Thomo is offline Thomo  United Kingdom
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Quote:
Originally posted by Malefoda

Last word about the BG: maybe they give a bit harsh sound right now and need some burn-in?
I would say yes. Also, if you've not separated the 5v rails yet, they're probably revealing weaknesses elsewhere. Just adding another 7805 reg for the dac analog will help a lot. Although I can whole-heartedly recommend Brent's S-Power there, I am amazed at the improvements it made over my Audiocon Invisus.

Lee.
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Old 3rd December 2007, 06:33 PM   #8508
RCruz is offline RCruz  Switzerland
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Quote:
Originally posted by Thomo


I would say yes. Also, if you've not separated the 5v rails yet, they're probably revealing weaknesses elsewhere. Just adding another 7805 reg for the dac analog will help a lot. Although I can whole-heartedly recommend Brent's S-Power there, I am amazed at the improvements it made over my Audiocon Invisus.
Hi Lee

Splendid idea... i will try this mod... maybe I could use a LM340AT instead ?

Can you please identify the dac analog +5v rails ? I know there are several but do not know how to identify them.

Regards

Ricardo
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Old 3rd December 2007, 07:27 PM   #8509
RCruz is offline RCruz  Switzerland
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Default CD 53 SE Decoder cap C513

Hi

I have a problem related with the PCB layout in my CD53SE.

It is different from the CD53 schematics that I have because the cap C513 (0.047 ceramic) is vertical in my player and not horizontal as in the schematics.

In the schematic, the C513 links the pin 15 to ground (pin 16 is linked to ground also).

In my PCB, the C513 (vertical) links pins 15 and 16.

I need to know if pin 16 is internally earthed (below the decoder) or if the design is different because I want to replace this cap by a 150uF Os-Con.

Regards

Ricardo
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Old 4th December 2007, 04:17 PM   #8510
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The BG are burnin' in...
Meanwhile I've to find a way to make cheap 5V rails, I think the best is to find a cheap 2x 9V and clean each to 5V, and right now I've in hand second hand caps, even if used very few (from my company's faulty stuff).
What may I use from this?
Loads of Panas FC 1800/63, former opamps caps (470/25 RJH), some older Nichi PL...
Maybe just Tx, big caps (FCs?), 7805, caps (RJH?) and go? Maybe I'll re-use the RJH fitted on each rails on the PCB?
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