Thanks, It appears that mine are fake, and I have revised my Swap Meet ad accordingly.
can you please share the BOM and the schematics for these 2 gerbers? I apologize if i missed it
hi,
I can tell you clearly that the resistance value between 9pin and 10pin of the genuine AD1862N or NJ is 3K
I have two different versions of AD1862NJ. For reference
I thought you were talking about the LM6171.
I want to know what adaptations I can do with that opamp to alter the sound.
There is a lot to do for the AD811 sounds better too... But here it is easier, you have to supress some parts of the original G BOM everyone populated as per the shematicc ! 🤣
No. Like I mentioned an LM6171. You suggested to look at the datasheet, which I did...but I don't see anything that I can use. Maybe you can enlightened me.
For this one that is the opposit, no needs to supress parts but at the opposit add some! Look at the page on the layout talking about an input resitor as well as a minimal feedback filtering. For the input, you can't on the classic pcb here where the inverting input is directly seing the dac chip output. Notice instability/oscillation is not always heared but can also contribute to the sound...
Also it has a high slew rate, and certainly high bandwidth, so fast enough : it migth benefice of the smd pcb version instead an adaptator theorically. The slew rate is faster than the AD811's...
Better first to have a proper pcb design for the faster op amps. I think it is more clever than buying expensive discrete designs before as certainly better op amps exists when layouted well and less expensive. IMHO, YMMV of course.
If it sounds good enough as sugested Vunce, keep it like it is. Eventually swap for a DIP8 less fast talked in the thread...
Also it has a high slew rate, and certainly high bandwidth, so fast enough : it migth benefice of the smd pcb version instead an adaptator theorically. The slew rate is faster than the AD811's...
Better first to have a proper pcb design for the faster op amps. I think it is more clever than buying expensive discrete designs before as certainly better op amps exists when layouted well and less expensive. IMHO, YMMV of course.
If it sounds good enough as sugested Vunce, keep it like it is. Eventually swap for a DIP8 less fast talked in the thread...
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Can oscillation be addressed on the existing PCB?
So far I didn't find information about it.
Only to put an 0,1uF between V+ and V- but I guess it has a lot to do with the quality of the power supply.
So far I didn't find information about it.
Only to put an 0,1uF between V+ and V- but I guess it has a lot to do with the quality of the power supply.
depends of the op amp used.
I am not talking about voltage noise.
I surmise the datasheet to be not written for nothing.
I am not talking about voltage noise.
I surmise the datasheet to be not written for nothing.
HifiTunes,
I think you’re over complicating a simple solution. Use the board as is by plugging an opamp into the socket. If you wish to experiment with more complicated I/V solutions, you need to address it off board or a different board completely. The thread is full of ideas, projects, and opinions on many different I/V solutions.
Start reading through the thread. It is long, but you will find most of your answers.
As Iggy would say…RTFT!!👍🏻
I think you’re over complicating a simple solution. Use the board as is by plugging an opamp into the socket. If you wish to experiment with more complicated I/V solutions, you need to address it off board or a different board completely. The thread is full of ideas, projects, and opinions on many different I/V solutions.
Start reading through the thread. It is long, but you will find most of your answers.
As Iggy would say…RTFT!!👍🏻
