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Old 1st October 2008, 07:01 AM   #10921
Thomo is offline Thomo  United Kingdom
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Default Re: Happy DOS:D

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With your help Gentlemen, I succesfully implemented the DOS.
Excellent Ricardo, glad it works.

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Of course my precious Wife helped a lot also.... She verifies the solder for me.
How did you manage this? My wife gives me that glazed eyed look and a rude but humorous comment. I don't ask any more except to produce a comedy moment when I'm bored!

Lee.
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Old 1st October 2008, 07:26 AM   #10922
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Nice one Ricardo

Brent
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Old 1st October 2008, 07:30 AM   #10923
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Ray

When I fitted SPowers on my driver chips I had to short out the fuses to stop voltage drop before the regs. The sound does improve too, the bass tightens and the rhythm becomes more foot tapping

On a side improvement the laser tracks and reads much quicker.

Brent
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Old 1st October 2008, 08:57 AM   #10924
SimontY is offline SimontY  United Kingdom
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Ahh, so much to do, so much more smoke to release.

Ricardo - well played getting the DOS working the first time, that's excellent work. Those wires from the DAC can be fiddly, at least if they're piddly thin silver...!

Simon
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Old 1st October 2008, 09:03 AM   #10925
RCruz is offline RCruz  Switzerland
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Default Re: Re: Happy DOS:D

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Originally posted by 6h5c


Congratulations! Please do report
No smoke? That's excellent, I hope you enjoy it very much.

Thank you Ray
The only smoke I produced came from my burning fingers (I grabbed the iron when it fell to the ground)

Quote:
Originally posted by Thomo


Excellent Ricardo, glad it works.

How did you manage this? My wife gives me that glazed eyed look and a rude but humorous comment. I don't ask any more except to produce a comedy moment when I'm bored!

Hi Lee

My Wife has very good eyes and is always willing to help.

She does enjoy the big improvements in sound quality also.

Quote:
Originally posted by rowemeister
Nice one Ricardo

Thank you Brent.

Now its time for the Decoder PSu.

I will report the improvements latter.

Ricardo
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Old 1st October 2008, 09:09 AM   #10926
RCruz is offline RCruz  Switzerland
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Quote:
Originally posted by SimontY
Ahh, so much to do, so much more smoke to release.

Ricardo - well played getting the DOS working the first time, that's excellent work. Those wires from the DAC can be fiddly, at least if they're piddly thin silver...!

Hi Simon

Your comments are very welcome.

I really did a very good planning this time so I did know exactly what to do and in what order.

It took me 6 hours work but everything went according to plan.

I experimented some "pad lifting techniques" when removing the opamp caps but I really do not need them anymore.

Ricardo
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Old 1st October 2008, 09:10 AM   #10927
SimontY is offline SimontY  United Kingdom
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Hahaha, it's all about the pad-lifting technique!!

Waiting to hear how it sounds now

Simon
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Old 1st October 2008, 09:23 AM   #10928
RCruz is offline RCruz  Switzerland
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Quote:
Originally posted by Glenn2


This mod gives huge improvements. I regulated them to +/-7V with LM317/LM377. They are only called upon to supply +/-5V. and the regs only need small heatsinks. It makes a big difference.

Quote:
Originally posted by 6h5c

Thanks, i'm absolutely going to look into that. I have some LM-boards left (the Eddy Wang version) that are perfect candidates.

Quote:
Originally posted by rowemeister
Ray

When I fitted SPowers on my driver chips I had to short out the fuses to stop voltage drop before the regs. The sound does improve too, the bass tightens and the rhythm becomes more foot tapping

On a side improvement the laser tracks and reads much quicker.
Now this is really very interesting.

In the CD53 the drivers are fed by +10v unregulated.

Someone has already mentioned usinf LDO to regulate this line.

Some use 9v ... others use 7v.... and I know the CD67 uses 5v...

I am a bit confused

What is the correct voltage to use here (or can I use any voltage from 5 to 10v ???)

Regards

Ricardo
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Old 1st October 2008, 09:25 AM   #10929
SimontY is offline SimontY  United Kingdom
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Quote:
Originally posted by RCruz
What is the correct voltage to use here (or can I use any voltage from 5 to 10v ???)
Yeh, pick whatever suits your regulator and available heatsinking. More voltage drop equals more heat.

Simon

ps. all I've done in this area is solder wire across the fuse holder.
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Old 1st October 2008, 09:46 AM   #10930
RCruz is offline RCruz  Switzerland
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Quote:
Originally posted by SimontY


Yeh, pick whatever suits your regulator and available heatsinking. More voltage drop equals more heat.
Thank you again.

Do you know why the stock CDP uses +-10v ?

Ricardo
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