This is about building this. I did not find any build over the Internet. It looks fairly simple to build all it needs is parts values and parts lists as well as details about the CCS so that it can be built without any fuss.
A little background about me. I have no formation in electronics and no commercial interests. I built Broskie unbalancer with great success as well as the Aikido. I had a designer build me a discrete transistor I/V for tda1541, which sounded very plain. I recently modified a pcm58dac from China.
While the AKM dac is a disappointment in all aspects of its sound, with Broskie schematic and a little bit of diy upgrades it keeps impressing me. Where it lacks is in the texture department and sound signature.
On the pcm58, it is highly scalable and responds very well to filters upgrades as well as modern development regulators in the power supply. 4 bits are adjustable. Good chips also exist in decent quantities. It sounds very similar to newer AKM dacs in it's neutral presentation. Maybe the best dac was Cirrus 4398? we should re-evaluate this!
The Opamp classic i/v filter is very accurate especially with modern opamp such as OPA1611, 604, and gets the maximum out of the PCM58.
This is for curious dyer's who want to go into tube territory as DAC output. Far from being colored and warm, a proper tube output stage is very accurate and I am confident in Broskie schematic.
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