I want to upgrade my DVD-SACD-CD player with better opamps.Do you have any expirience on these opamps.What character in sound do they have?
I just ordered one of these for my NS900 (AD8065):
http://www.lcaudio.dk/com/index.php?page=5
Do you know what are the basic differences between AD8065 and 8066?
http://www.lcaudio.dk/com/index.php?page=5
Do you know what are the basic differences between AD8065 and 8066?
Drioannis said:
8065 is single while 8066 is double.
They are great opamps, probably the real top now.
But - they are very very sensitive to capacitive load. So follow the datasheet recommendations and separate every cable, even as short as 10 cm, by resistor in series with opamp output. Direct replacement for older opamps in a socket may bring oscillations.
Hmm... Knowledge comes with pain...
How about the LCaudio module. Is there something that helps to prevent any oscillation.
The attachment is a picture of the players analog output. Any comment on that. Should I replace some parts when I replace the OPAmp with LCaudio module.
Any help is greatly appreciated !
🙂
Edit: My preamp is passive 10 kohms. Any problems to be expected?
http://kotiweb.kotiportti.fi/audiovideo/DIY/preamp1/
How about the LCaudio module. Is there something that helps to prevent any oscillation.
The attachment is a picture of the players analog output. Any comment on that. Should I replace some parts when I replace the OPAmp with LCaudio module.
Any help is greatly appreciated !
🙂
Edit: My preamp is passive 10 kohms. Any problems to be expected?
http://kotiweb.kotiportti.fi/audiovideo/DIY/preamp1/
I have not yet in my hands the opa2134 and the ad8066 but I hope in a few days to give you some info.
What type of ad8066 SOIC8 or ad8066 MSOP8 is for the NS900?I think the first.The 8066 is the dual version of 8065.Normaly the NS900 has dual opamps but the LC made a base and putted 2 8065 in one socket.
LC Audio rules!
The AD8065 that I ordered earlier this week arrived today. The same week! Can't get any faster than that!
The packing was also top notch!
LC Audio - Highly recommended 🙂
Let's see if I can install this without smoke.
Edit: I have to gripe about one thing. There was no documentation or manuals included in the delivery
The AD8065 that I ordered earlier this week arrived today. The same week! Can't get any faster than that!
The packing was also top notch!
LC Audio - Highly recommended 🙂
Let's see if I can install this without smoke.
Edit: I have to gripe about one thing. There was no documentation or manuals included in the delivery
Check the DC offset on the IC output, you might also be able to get away with bypassing (short) the 100 uf electrolytic output coupling caps C212 & C214. Cheap electros aren't usually considered 'sonically optimum' devices.
How is the dc offset measured?
Those caps are Nichicon Fine Gold caps. they should pretty ok, but I'm considering changing them to Black Gate caps. I don't dare to remove the caps completely
Picture of the original OPA and the place where it used to be:
I had to put a holder under the AD8065 to lift it above the caps.
AD8065 at its new home:
http://kotiweb.kotiportti.fi/audiovideo/DIY/cdout/paikallaan.jpg
I have to burn in the new OPA before I say anything about its sound.
Those caps are Nichicon Fine Gold caps. they should pretty ok, but I'm considering changing them to Black Gate caps. I don't dare to remove the caps completely
Picture of the original OPA and the place where it used to be:
I had to put a holder under the AD8065 to lift it above the caps.
AD8065 at its new home:
http://kotiweb.kotiportti.fi/audiovideo/DIY/cdout/paikallaan.jpg
I have to burn in the new OPA before I say anything about its sound.
I am still waitting my OPA2134.I also oldered some mases for it(I also can try more easy meny op amps).
Confused about muting transistors...
I would like to get rid of those nasty muting transistors. I tried to search for a thread with instructions how to change the transistors to ralays but I didn't find any.
Any good links to internet pages with instructions how to do this thing??
From LC Audio AD8065 web page:
"Modules with DIP pinout for direct mounting in CD / SACD / DVD players. Silver / MICA decoupling capacitors are included for trouble free installation in any model with through hole mounted op-amps"
Are there some capacitors left in the output that should be removed?
Burning in the new OPA has changed the sound. Soundstaging didn't change IMHO but the background might be a little darker. The sound is definitely more dynamic and accurate but I would say that separation had become better. Need to do some burning before I say anything more.
I would like to get rid of those nasty muting transistors. I tried to search for a thread with instructions how to change the transistors to ralays but I didn't find any.
Any good links to internet pages with instructions how to do this thing??
From LC Audio AD8065 web page:
"Modules with DIP pinout for direct mounting in CD / SACD / DVD players. Silver / MICA decoupling capacitors are included for trouble free installation in any model with through hole mounted op-amps"
Are there some capacitors left in the output that should be removed?
Burning in the new OPA has changed the sound. Soundstaging didn't change IMHO but the background might be a little darker. The sound is definitely more dynamic and accurate but I would say that separation had become better. Need to do some burning before I say anything more.
They Came!!!
They CAME!!!
http://briefcase.pathfinder.gr/download/drioannis/24739/296476/0/Opa2134+NS900.jpg:D 😀 😀
These are the bases
http://briefcase.pathfinder.gr/download/drioannis/24739/296469/0/Baseis+gia+OpAmps.jpg
These are the electrolytics
http://briefcase.pathfinder.gr/download/drioannis/24739/296468/0/Piknotes+100%ECF+37V.jpg
They CAME!!!
http://briefcase.pathfinder.gr/download/drioannis/24739/296476/0/Opa2134+NS900.jpg:D 😀 😀
These are the bases
http://briefcase.pathfinder.gr/download/drioannis/24739/296469/0/Baseis+gia+OpAmps.jpg
These are the electrolytics
http://briefcase.pathfinder.gr/download/drioannis/24739/296468/0/Piknotes+100%ECF+37V.jpg
DIAR: You could try to first simply remove the muting transistors, if you notice any problems caused, then you can later add relays. If there arent any problems, just do without them 😀
My dvd963sa has been playing with new op-amps (ad8066 as I/V and ad8620 as output stage) and without muting transistors for about 3 weeks now, and no problems has accured. The only time I notice any distorition caused by no muting transistors, is if I turn off the dvd player before the preamp..
My dvd963sa has been playing with new op-amps (ad8066 as I/V and ad8620 as output stage) and without muting transistors for about 3 weeks now, and no problems has accured. The only time I notice any distorition caused by no muting transistors, is if I turn off the dvd player before the preamp..
Drioannis,
What are those caps for and where exactly did you put them.
I suppose I can try to remove the transistors and try how the player likes it. My power amp and my preamp are always on. The player shuts itself if it isn't played for a while (15 min?)...
What are those caps for and where exactly did you put them.
I suppose I can try to remove the transistors and try how the player likes it. My power amp and my preamp are always on. The player shuts itself if it isn't played for a while (15 min?)...
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