DAC AD1862: Almost THT, I2S input, NOS, R-2R

[MrHifiTunes]

That's a bit vague for me.
Just looking for some things to play and experiment with.

 

[diyiggy]

There is a lot to do, smd opamps to try, pcbs, discrete I/V, PS, digital frontend...

 

[MrSlim]

I took a pair to measure ~ 3.2K on both.
Another pair of different production lot ~ 2.99k on both

Thanks, It appears that mine are fake, and I have revised my Swap Meet ad accordingly.

 

[Eliad]

Here we go, gerbers for grunfs' CCS tube output and a quite raw PSU.
Today I'll be testing the old boards, just in case.
However these are perfected.

can you please share the BOM and the schematics for these 2 gerbers? I apologize if i missed it

 

[CNOracle]

Hey can someone who has a known authentic AD1862 check something for me. I have 2 pairs of chips for sale, but am not sure of their authenticity. Nopants suggested that the feedback resistor (on pin 10 as per the AD1862 Data sheet ) should measure 3K, which is also mentioned in the datasheet. If I am reading the block diagram correctly, I should get 3K between pins 10 and 11, but I am not getting that (one measures 22K, others just measure open). Can someone confirm what they get if they measure a real AD1862?
Thanks

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

 

[tommuel123]

Go to post #1042. Miro posted the resistances across pins.

M

Post in thread 'DAC AD1862: Almost THT, I2S input, NOS, R-2R'

2020-10-31 9:59 pm

here are resistances between pins on a working AD1862:

1-2 = 2R
11-12 = 3k3
13-12 = 6k6
1-3 = 38k
1-12 > 14M
16-12 > 14M
1-16 > 17M
4-9 > 25M or open
8-9 > 25M or open
4-8 > 25M or open
15-12 > 25M or open
5,6,7 - 9 = open

• miro1360

 

[MrHifiTunes]

There is a lot to do, smd opamps to try, pcbs, discrete I/V, PS, digital frontend...

I thought you were talking about the LM6171.

I want to know what adaptations I can do with that opamp to alter the sound.