Miro, what do you think about of galvanic isolation and separate feeding of the usb transport? Is it possible to get with my Amanero for example? I heard that is very positive for sound and many people use that. What does it take?
For 63? I know only dac with digital filter. I can't imagine the NOS version. This is first version which I see for all my experience) It's very interesting the final result!
I also ordered 1702 chips yesterday. The board will be ready to the next week and I start to search and buy the details. I was very impressed by 1704K Dac.
I used one from silicon labs for I2S signal, then removed it and the sound went slightly better (well, it is subjective). I did not notice any practical improvement == I will never use it again with DAC 😉
I am interested in how much current the DAC consumes (with AD1865), primarily the digital part with shift registers (+ 5V). At the moment it is very difficult to get adjustable version of the LT1963/3015 so I have to make an alternative power supply. For + 5V. That’s until I get LT regulators. I plan LP2950ACZ-5.0, (TO92 100mA), for +5V digital part. The analog part with OPA will be + -12V with LM2940 CT-12 regulators. OPA is Sparkos SS3601. The analog part of the AD1865 will be + -5V with LP2950ACZ-5.0 regulators. The transformer has two 12VAC secondaries, 16VA.
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I only saw one man do this with PCM63P - Orronoco at blogspot point to point, but he didn't have JLSound or WaveIO, that means a lot. 😎
AD1865 is power friendly, very low current consumption.
25mA for digital part with shift registers is enough 😉 ... analog part +-30mA.
