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Old 5th May 2011, 01:45 PM   #1
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Default Another Cmoy Project

A small project with the Cmoy shema .
I have decided to make a PCB with two single AOP SO-8 .
Dimensions :52x54mm

I have received the CI ,and i am waiting for some components .

I will post some pictures in the next days .

Serge
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File Type: jpg CmoyV2CI.JPG (24.6 KB, 561 views)
File Type: jpg CmoyV2Impl.JPG (45.7 KB, 556 views)
File Type: jpg CmoyV2Shema.JPG (13.1 KB, 555 views)
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Old 6th May 2011, 07:15 AM   #2
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Two pictures before soldering the AOP

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File Type: jpg CmoyV2CI.JPG (53.9 KB, 511 views)
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Old 6th May 2011, 05:51 PM   #3
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More pictures:

LG CD drive ,
Shunt Reg. by SALAS from the Hypnotize for the "CMOY"
The CMOY is connected to the analog ouput of the CD drive
The AOPs are OP 1611

Last picture a CMOY version with a double AOP LT1364 ( Good !!!!)

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File Type: jpg CMOY1.jpg (37.4 KB, 225 views)
File Type: jpg CMOY2.jpg (28.5 KB, 188 views)
File Type: jpg CMOY3.jpg (20.6 KB, 143 views)
File Type: jpg CMOY5.jpg (29.7 KB, 160 views)
File Type: jpg CMOY6.jpg (25.5 KB, 184 views)
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Old 8th May 2011, 05:34 PM   #4
Bigun is online now Bigun  Canada
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Looks very well done to me. Nice choice of power transformer too.
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"The test of the machine is the satisfaction it gives you. There isn't any other test. If the machine produces tranquility it's right. If it disturbs you it's wrong until either the machine or your mind is changed." Robert M Pirsig.
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Old 9th May 2011, 04:00 AM   #5
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The LTC 1364 has more dynamic ,more bass ,more details !!!!!!


I have good CD records for testing your system and

i am very surprised by the good quality of the LG drive analog output .


If you have ideas about a single AOP so good than the LTC 1364 give me your choice



Serge
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Old 12th May 2011, 07:11 PM   #6
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I received two samples from TI :THS3121 SOIC

The best for the moment .... for my configuration ....

Next step :
a CI for two LME49600 with a double AOP ( DIP8 ) or two single AOP ( SO-8)

Serge
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Old 13th May 2011, 12:56 PM   #7
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I need advices about the shema attached with LME49600

Do you think that the shema is correct ?

Thanks

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Old 13th May 2011, 06:17 PM   #8
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LTC 1028:



There is always a souffle in the headphone and a little noise at the beginning of the potentiometer .

The gain is around 2 perhaps is not enough !!!!!


What is the best solution ,increase the gain or a capa at the input ?



Thanks



Serge
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Old 26th May 2011, 08:45 AM   #9
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Lt1028 with 5 for the gain is good .

I did some tests with LM317 and LM337 regulators .
One LM317 and one LM337 for each AOP .( Two single AOP ).



The results are :Where are the bass and the dynamic ?
I have no more fun listening to my CD

Probably:errors implentation ,bad capacitors choice .......
If you have any advices for improvement

For the moment the Shunt Reg. by SALAS is better .
This weekend some tests with OPA827 and OP1641

Serge
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Old 26th May 2011, 07:09 PM   #10
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This weekend some tests with OPA827 and OP1641
No the tests are Today !!!
And the winner is ....... OPA827

For the moment the best AOP are LT1028 and OPA 827 always with the Shunt Reg. by SALAS

The best AOP for this application and for me

Serge
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