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Old 28th February 2006, 06:07 PM   #1071
mickie is offline mickie  Germany
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Quote:
Place a 1 euro coin in the centre of the spinning clamp and see if the noise goes..........( I use a 10p coin)
Hi,
...yes i tried this before, no way to put euro-coins in, they don't fit exactly...disc-clamp keeps "egging" around even more; maybe other currencies are more suitable.
But i don't think its related to this cd-r thing, seems the laser can't focus the track-markers or something like that.

mickie
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Old 28th February 2006, 06:08 PM   #1072
6h5c is offline 6h5c  Netherlands
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Quote:
Originally posted by SimontY
wires - nice ones, not too much nasty teflon or silver plating (no offence Ray, maybe these things are ok with tubes).
None taken
Mine is solid silver BTW. Big difference

Ray.
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Old 28th February 2006, 06:10 PM   #1073
SimontY is offline SimontY  United Kingdom
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Quote:
Originally posted by 6h5c


None taken
Mine is solid silver BTW. Big difference

Ray.
Ahh, well I think it's the effect of the plating that sounds bad maybe..
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Old 28th February 2006, 06:11 PM   #1074
poynton is offline poynton  United Kingdom
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Quote:
Originally posted by mickie


................. maybe other currencies are more suitable.................

Hi.

Keep the pound.... we need it to repair our cd-p's!!!!
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Old 28th February 2006, 06:18 PM   #1075
6h5c is offline 6h5c  Netherlands
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Quote:
Originally posted by mickie
Ok, what are "PPS"?
Hi mickie,

PPS = Polyphenylene Sulphide. It's a plastic, used as dielectric in caps. It has a lot of good properties.
Here's a PDF with a table that shows the differences between various capacitors.

Regards,

Ray.
Attached Files
File Type: pdf cap_dielektricum.pdf (75.8 KB, 215 views)
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Old 28th February 2006, 10:11 PM   #1076
ash_dac is offline ash_dac  United Kingdom
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Default Re: Re: Re: Analogue supply to the DAC

Quote:
Originally posted by poynton






Hi.

The outputs - LO/LON, RO/RON - cannot be reclocked for the following reasons.

1. We are talking about Pulsewidth modulation. The pulse WIDTH varies!

2. The start/end of the pulse is not fixed - it is the centre.


3. Sampling the centre of the pulse would serve no purpose as it defines nothing!



The voltage at the outputs (LO/LON, RO/RON) of the DAC is irrelevant since the op amp sees both (common mode).

Andy
Thanks you have made things clearer!

So therefore this design is quite jitter-resistant ?
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Old 1st March 2006, 12:50 AM   #1077
adfinni is offline adfinni  United Kingdom
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Well this is just bloody great. I have just ordered a little PSU from andy to use for a new superclock 2, but have now bought the clock as well, rather than waiting until easter, Just great !!!!

Bye bye 118, and hello a much sweeter sounding CDP. God my darling grados are loving this, and they just keep sounding better and better, the more i get hooked on hi-fi, and modifications

I think i may be coming back in the next week for some fitting advice. Am i right in saying that the + and - 12V audicom super-regs need to be placed close to the op-amps?
Also, where can i put the 5V super-reg for the best effect.

ta

Ad
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Old 1st March 2006, 06:47 AM   #1078
adinica is offline adinica  Romania
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I've just changed the njm2114d/4556ad op-amps with ad826an/njm2114d (just for headphone amp) in my cd67se. This was the only tweak and the sound is now more relaxed, smoother, more dynamic, with a huge soundstage. I'm very pleased by now. I don't like the Burr-Brown sound, so the new ad826 was soldered directly in the board, with no sockets. Good luck.
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Old 1st March 2006, 07:41 AM   #1079
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Quote:
Originally posted by adfinni
Well this is just bloody great. I have just ordered a little PSU from andy to use for a new superclock 2, but have now bought the clock as well, rather than waiting until easter, Just great !!!!

Bye bye 118, and hello a much sweeter sounding CDP. God my darling grados are loving this, and they just keep sounding better and better, the more i get hooked on hi-fi, and modifications

I think i may be coming back in the next week for some fitting advice. Am i right in saying that the + and - 12V audicom super-regs need to be placed close to the op-amps?
Also, where can i put the 5V super-reg for the best effect.

ta

Ad
adfinni

I placed the +/- 12V regs next to the op amps. Closer the better , less likely to pick up any noise and current drop would also be less (its only tiny but its there).

Also since doing this I downloaded the CD17 KI manual and they put the 2 12v regs right next to the HDAM and on the CD 6000 they are between Hdam and opamps.

So I must be doing something right

Regarding the 5V super reg.... buy another one for 16 off ebay and mount them on a custom pcb and use one for the digital 5v to the DAC and Decoder. Then use the otherone for the analogue 5v on the same ic's. Make sure you have some better than standard caps near the dac/decoder.

Also if you can run these two regs from a small custom TX it will be even better. If HDAM and muting is removed and you fit 12v regs next to opamps you can take the +20v from C803 for the 5v regs.

Also run the clock off a +12V super reg

All this will give you a very good improvement.

Hope I have not confused you

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Old 1st March 2006, 08:22 AM   #1080
6h5c is offline 6h5c  Netherlands
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Quote:
Originally posted by rowemeister
---I placed the +/- 12V regs next to the op amps. Closer the better , less likely to pick up any noise and current drop would also be less (its only tiny but its there).---
Hi Brent,

Where / how did you connect the ground to the regs? Did you use the groundplane?

Ray.
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