the transformers was properly loaded during tests ?
10k load is reccommended.
and how do you did the arta response frequency ?
you have separately injected the pink noise ?
maybe is the hqplayer algorithm.
10k load is reccommended.
and how do you did the arta response frequency ?
you have separately injected the pink noise ?
maybe is the hqplayer algorithm.
I also have the same SRC board. It does not provide high quality sound.
In the coming days I will be able to repeat your measuring stand and report the results.
In the coming days I will be able to repeat your measuring stand and report the results.
So I'm late to this party, and wondering if anyone knows where to get Philips/NPX 74AHCT595D?
That seems to be the biggest issue, although I haven't read the entire thread, I've gone though enough to know I need this part.
Randy
That seems to be the biggest issue, although I haven't read the entire thread, I've gone though enough to know I need this part.
Randy
Well I knew it was kind of a long shot.
Started looking at Taobao via an agent like superbuy
I'm guessing that's what others did to buy these parts
Randy
Started looking at Taobao via an agent like superbuy
I'm guessing that's what others did to buy these parts
Randy
Looks like the Lundahl is defintely better than the chinese 10k, no ? I mean, we talk about resistors costing 100$?...I would not go cheap on the transformer then...or better not use a transformer at all and directly go on the grid of a tube...
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Thanks for the offer.
Someone in the US had some extra parts, and is sending them my way.
For the output transformers, has anybody compared the chinese yellow or blacks to lundahls?
Randy
i bought the dsc2 pcb and a pair of transformers from diyaudio member thuanth43 back in december 2018, only start to build the dac now, while trying to install the transformer, i realized did he sold me the wrong transformers? it's size is too big to fit the footprint of the pcb, even with some bending of the legs of the transformer, and the impedance of the transformer is 2k not 300ohm.
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Hi
This xfrms are good. Before any load aplied to the secondary, please go to the RC network to fix the ringing. With square w. 10KHz-15KHz to 20KHz. C should be smaller as can be R should be hugher. Trim values to eiminate ringing. BUT with real amalog generator resistance just same like DAC output before trafo. You can use the same analog output, just disconnect DSD dac section...
.
This board has in the same time DSD and I2S outputs. DSD output is always the same value regardless of input dsd OR I2S format. And of choosen output I2S format sampling rate jumper selection. SCK of DSD is always about 3.xx MHz. If I remembered well? Please measure with a scope. I am using that board for mesaurements of DSD because all of the measurement software generators have only I2S outputs...
...
(BTW the sound of this PCM5xxx on the board is awfull, but that is just for the sideshow. Board is good.
, well built, and with solid manual test options.)
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Hi all this my board DCs v3.0
It finis all, thank your see it!
Quanghao
It finis all, thank your see it!
Quanghao
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