Reference DAC Module - Discrete R-2R Sign Magnitude 24 bit 384 KHz

[bmxmen]

Dam 1121 have better clock,and i want it in my dam1021 batery moded dac. have any one try to put si570 clock to 1021?

 

[analog_sa]

Dam 1121 have better clock,and i want it in my dam1021 batery moded dac. have any one try to put si570 clock to 1021?

Apart from having a better clock it also reclocks. You cannot randomly transplant software controlled clocks.

 

[analog_sa]

This is absolute full moded 2x dam1121. Plays very nice.

Very impressive and tastefully mad

 

[bmxmen]

But software can be changed to.

 

[bmxmen]

Soryy for writing all the time obout clock but im wondering why dam 1101 have two clocks? Dac looks nearly same, mayby clocks have one frequency. But in spec looks not that good like others dams. In spec best is 1941, but why dam1021 dont have 132db ?

 

[Ryssen]

Ive got a bunch of 2200uF smd elyts,can I use them to do a Vref mod.
Or is it to much?

 

[analog_sa]

But software can be changed to.

It can. But by whom?

 

[analog_sa]

In spec best is 1941, but why dam1021 dont have 132db ?

Because it is not differential?

 

[TNT]

Ive got a bunch of 2200uF smd elyts,can I use them to do a Vref mod.
Or is it to much?

There are measurements with different size capacitance and its impact in this thread.

//

 

[zfe]

There are measurements with different size capacitance and its impact in this thread.

//

They are easier to be found at: Soekris DAC: Modding VRef | H i F i D U I N O
But that was all with an unmodified resp "factory moded" v1 board, I think. In how far that is still valid for the actual boards would needed to be tested.

 

[godady]

I made a big mistake. I tried to replace 1117 to tps7a4701, but I did wrong calculate, output is over 6V, I know it probably burn some part, could someone give me a hint? I need to know where can I start.

 

[Ryssen]

There are measurements with different size capacitance and its impact in this thread.

//

Well they used 2200uF and the messaurement sems fine.
So there are only 4v over the e-lyts mine can take 16v so its a little bulkier.

 

[godady]

I made a big mistake. I tried to replace 1117 to tps7a4701, but I did wrong calculate, output is over 6V, I know it probably burn some part, could someone give me a hint? I need to know where can I start.

I think CPU or other two component are burned, I will find the new picese to replace them. Could Søren tell me what model of them?

An externally hosted image should be here but it was not working when we last tested it.

 

[soekris]

I think CPU or other two component are burned, I will find the new picese to replace them. Could Søren tell me what model of them?

An externally hosted image should be here but it was not working when we last tested it.

Can't see picture, but most likely most parts powered by 3.3V died....
I'll recommend to just purchase a new board, replacing the 256 pins BGA packaged FPGA is not something you can do yourself....

 

[godady]

Can't see picture, but most likely most parts powered by 3.3V died....
I'll recommend to just purchase a new board, replacing the 256 pins BGA packaged FPGA is not something you can do yourself....

Too sad.
I removed stm and winbond components, still get short, likely you said.
I like this board very much. I'll purchase a new board when I have enough budget.
Thanks for your reply.

 

[EugenKo]

I have been using DAM1021 for several years.
Yesterday I decided to try playing DXD files, (352/24), and I was surprised to hear that everything is reproducing, but the tones are shifted down in frequency, about a half to two times (I haven’t measured yet).
I wonder how is this even possible?

The setup consists of:

NAS Synology + MinimServer
NMR media renderer

DAM1021 (NOS filter)

 

[analog_sa]

So, all other sampling rates play fine? Does the board detect the SR correctly?

My first look would be at the i2s cabling.

 

[EugenKo]

So, all other sampling rates play fine? Does the board detect the SR correctly?

My first look would be at the i2s cabling.

Yes, up to 192/24 and DSD128 all fine.

I have no indications of SR, this was not required.

 

[analog_sa]

My guess is the DAM determines wrongly the 352kHz. It may be just long connecting wires for the i2s signal. It doesn't sound like something broken in the dac.

 

[EugenKo]

My guess is the DAM determines wrongly the 352kHz. It may be just long connecting wires for the i2s signal. It doesn't sound like something broken in the dac.

I think I’ll have to open the device and check the BCK, LRCK and Data signals with the oscilloscope.