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

[NIXIE62]

This just needs to be connected to the mute/delay circuit, and put a stronger relay on the output to make it truly universal. The good thing is that by adding a trimmer to the NFB, the sensitivity can be adjusted depending on the purpose. Since I don't know how to draw PCBs, it will stay like this. 🙄

 

[gsrchrisu]

Just a heads up for anyone wanting to save some money. I built a 2nd ad811 I/V with left over parts and ordered an ad811 from this seller on Ebay. It was 10$cdn instead of 48 from Digikey. Showed up today and looks like the real deal, even passes the sound test. https://www.ebay.ca/itm/16605848248...-8b74-72b852b2bdb8|iid:1|vlpname:vlp_homepage

 

[miro1360]

@gsrchrisu This is good way to explore opamps for the genuinity 🤣

 

[NIXIE62]

Miro

 

[miro1360]

Very good, it's a pity that I don't have access, if someone has it, they can reveal the originality of the chips 😀

 

[samoloko]

Miro,
thank you for giving us joy from using these golden chips

Do you guys use miro boards with HQ Player - what are your Impressions using HQ Player to upsample data for AD1862 or PCM63 chips
What Is max resolution data stream you feed those chips

 

[Michelag]

@samoloko, this is a thing I never understood. How can I feed these chips with dsd or 24/192 and having them played...

 

[samoloko]

they can do PCM 20 bit and 16 x Fs
pcm1704 can do PCM 24 bit 768 KHz

 

[Michelag]

Yes, but what happens if I play a dsd128?

 

[samoloko]

generally You set output of player to send highest possible resolution of format that dac can accept
software player does heavy duty job /using PC resource/ converting material to PCM format

 

[NIXIE62]

What Is max resolution data stream you feed those chips

For the ones I made, max. sampling frequencies are:
PCM56, AD1856, AD1860 - 96kHz
AD1862 - 192kHz
PCM63, AD1865, PCM1702 - 384kHz
Bitrate: 16-32

 

[zoom777]

Just a heads up for anyone wanting to save some money. I built a 2nd ad811 I/V with left over parts and ordered an ad811 from this seller on Ebay. It was 10$cdn instead of 48 from Digikey. Showed up today and looks like the real deal, even passes the sound test. https://www.ebay.ca/itm/166058482482?_trkparms=amclksrc=ITM&aid=777008&algo=PERSONAL.TOPIC&ao=1&asc=20230811123856&meid=a4bd86459472446194f4d131f27c37a5&pid=101770&rk=1&rkt=1&itm=166058482482&pmt=0&noa=1&pg=4375194&algv=RecentlyViewedItemsV2&brand=Analog+Devices&_trksid=p4375194.c101770.m146925&_trkparms=parentrq:9e72f04a18f0aab3d3acb389fffe91a6|pageci:7d5b1bb8-17ef-11ef-8b74-72b852b2bdb8|iid:1|vlpname:vlp_homepage

Shocking price indeed, if they are genuine. Maybe measure quiescent current of the op amp? The iv board as 1ohm resistors to their rails if I remember correctly. Not many op amp is running such current.

 

[zoom777]

To clarify, I am assuming that the AD811 IV board is the one done by Vunce.

 

[gsrchrisu]

Yes its the Vunce board. They very well could be fakes. This is my second build from left over parts and thought I would try to save some money. They sound to me the same at the expensive parts but they very well could be fakes.

 

[grunf]

Ok, so, friends, please disregard my last upload #8261. I remade the boards for the tube output stage, with spacing fitting following BOMs. If possible i would ask a moderator to cancel previous uploads.
Schematics remain the same.
These 10uF Wima caps are huge, and so with more space perhaps you could fit some boutique cap. Now there's only 1 filament inlet, with the shortest path. I'll order them myself shortly.
Please let me know in case of further discrepancies.

Sorry @Michelag, I've been a bit busy lately so I'm not on the forum (I was even in Italy for a couple of days).
You must correct your PCB, I used the same ones I made for my hybrid amplifier with some corrections. It's important that you see how they should look. You have to miniaturize the CCS traces, I made them partially in SMD to make them as small as possible.
In this case, the tube was 6S4P, but it is important that you get an impression of how the PCB should look. Otherwise, the scheme is the same, instead of 47K you put Riv and a film cap in parallel with it.

 

[samoloko]

For the ones I made, max. sampling frequencies are:
PCM56, AD1856, AD1860 - 96kHz
AD1862 - 192kHz
PCM63, AD1865, PCM1702 - 384kHz
Bitrate: 16-32

thank you for reply
what Is your favorite choice for bit and sampling freq for pcm63 and ad1862
Is HQ Player your software

 

[Michelag]

Sorry @Michelag, I've been a bit busy lately so I'm not on the forum (I was even in Italy for a couple of days).
You must correct your PCB, I used the same ones I made for my hybrid amplifier with some corrections. It's important that you see how they should look. You have to miniaturize the CCS traces, I made them partially in SMD to make them as small as possible.
In this case, the tube was 6S4P, but it is important that you get an impression of how the PCB should look. Otherwise, the scheme is the same, instead of 47K you put Riv and a film cap in parallel with it.

Hey Grunf, thanks for your valuable input. Just for me, why is important to miniaturize CCS traces?

 

[NIXIE62]

I practice listening to either the original sampling rate, or doubled, meaning 44.1-88.2 and 48-96Khz. When I increase it even more, the sound seems to get softer. I use Album Player free, Foobar and AIMP.

 

[samoloko]

20 bit ?

 

[NIXIE62]

Mostly original bitrate, 16 or 24bit. I always watch YouTube 24/96. AIMP always outputs 32bits.