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
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
Attachments
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 !!!!)
Serge
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 !!!!)
Serge
Attachments
Member
Joined 2009
Paid Member
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
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
Some photos about the power supply with the LDO LT1764 Regulators .
On one Ci there are two LT 1764 one for the +13v and one for the -13v .
Why 13v .....1500 Ohms and 150 Ohms ....
There are two CI , one CI by single AOP .
I have also modified the Ci for the single AOP.I have added the place for capacitors diam 12mm ( Here NICHICON MUZE ) .
The AOP are LT1363 .
The results are very good .
Serge
On one Ci there are two LT 1764 one for the +13v and one for the -13v .
Why 13v .....1500 Ohms and 150 Ohms ....
There are two CI , one CI by single AOP .
I have also modified the Ci for the single AOP.I have added the place for capacitors diam 12mm ( Here NICHICON MUZE ) .
The AOP are LT1363 .
The results are very good .
Serge
Attachments
Some News
The tests now are done with an AKG 601 .....More details ,more bass ,more dynamic .
I have received an AOP from TI OPA 209 .
New Classification
-1- OPA 209
-2- LT1363
......
-3- OPA 827
I have just a problem wih the AKG the treble is sometimes a little bit too bright
What can i do ?
I have definitively abandoned the regulators LM317/LM337 or LT1364 for the benefit of the SALAS reg Shunt .Everything is better
Next Step :
The B1 Buffer followed by a TPA6120A2 .
Serge
The tests now are done with an AKG 601 .....More details ,more bass ,more dynamic .
I have received an AOP from TI OPA 209 .
New Classification
-1- OPA 209
-2- LT1363
......
-3- OPA 827
I have just a problem wih the AKG the treble is sometimes a little bit too bright
What can i do ?
I have definitively abandoned the regulators LM317/LM337 or LT1364 for the benefit of the SALAS reg Shunt .Everything is better
Next Step :
The B1 Buffer followed by a TPA6120A2 .
Serge
Some News
The tests now are done with an AKG 601 .....More details ,more bass ,more dynamic .
I have received an AOP from TI OPA 209 .
New Classification
-1- OPA 209
-2- LT1363
......
-3- OPA 827
I have just a problem wih the AKG the treble is sometimes a little bit too bright
What can i do ?
I have definitively abandoned the regulators LM317/LM337 or LT1364 for the benefit of the SALAS reg Shunt .Everything is better
Next Step :
The B1 Buffer followed by a TPA6120A2 .
Serge
Stupido i have posted two times the same message...Sorry
The tests now are done with an AKG 601 .....More details ,more bass ,more dynamic .
I have received an AOP from TI OPA 209 .
New Classification
-1- OPA 209
-2- LT1363
......
-3- OPA 827
I have just a problem wih the AKG the treble is sometimes a little bit too bright
What can i do ?
I have definitively abandoned the regulators LM317/LM337 or LT1364 for the benefit of the SALAS reg Shunt .Everything is better
Next Step :
The B1 Buffer followed by a TPA6120A2 .
Serge
Stupido i have posted two times the same message...Sorry
http://www.diyaudio.com/forums/headphones/192253-salas-dc-coupled-b1-buffer-tpa6120.html
After a few days i am not very satisfied by what i did
Good but FOR ME the OP 209 is best seen as good .
I am doing some tests with the LME49600+LME49900....
Serge
After a few days i am not very satisfied by what i did
Good but FOR ME the OP 209 is best seen as good .
I am doing some tests with the LME49600+LME49900....
Serge
Last edited:
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