Everything which has to do with design itself, circuits, rules, ideas etc.
Introduction My thesis for the development of the DDDAC1794-MK3 was to have a as low output impedance and low noise for the on-board regulator as possible (the LT1763). Especially in the low frequencies! In my introduction post on the newly designed DDDAC1794-MK3 (link here) I already showed some measurements from my AP-System. But not…
Introduction (with update 24-07-2024) I am in the process of building my own DDDAC1794MK3 “Signature” with an external, separate I2S streamer based on Gentooplayer and a Raspberry PI 5. I quickly found out (The WEB is full of it), that the RPI 5 is intended to be powered over USB-C with PD protocol. Powering…
Introduction Just a small in-between quick & dirty little project… It all started with a R2R DAC from Stefano, which was kindly sent to me for review, by Marcin. By the way…. there is a long thread about this Stefano DAC and the developments over time on the DIY Audio Forum: https://www.diyaudio.com/community/threads/italian-r2r-ladder-dac-no-cpid-dsp.390541/ Point is…
Introduction In my post on the DDDAC Power Supply, I have already been pointing out, that using a CLC-Filter after the rectifier is an improvement over the standard RCRC-Filter. Several DDDAC DIY enthousiasts have been reporting the positive sound impact of using CLC instead of RCRC only. The Magic Power Supply from the Audio…
Doede’s (DDDAC) “DD MC PRE PRE” “Something completely different” I too listen a lot to vinyl (LPs). Mainly inspired by Marco and Dick, who are playing with their restored Garrard series and brought their beautiful arm “Groove Master” to the market, I decided to beef up my analog playing gear. First, I built a…
The chronicle of this successful DIY-Project and a suggested roadmap for upgrading I just realized; it is already 10 years ago I designed the first version of the DDDAC1794! So, I thought it to be a good idea to write a short chronicle of the DDDAC history. The DDDAC1794 which is still available as…
Follow up from the earlier Post! In the earlier post I went into a lot of detail on this topic, so you might want to refer this post as well. In this second part I wanted to compare the new Accusilicon 338. I now finally received these with the Chinese parcel service but still…
Introduction Inspired by the many reports on the audiophile improvements when using UltraCaps (or super capacitors) in Audio applications, I decided it was time to start looking into this subject myself. For starters I wanted do some tests with it on my own DDDAC. Of course I am also interested in the technical aspects…
Introduction Here you see the well known DDDAC Power supply. I designed it to go together with the DDAC1794 kits, Of course it can also be use for many other audio applications. As DDDAC kit it comes as “5V” or “12V” version. As it is adjustable, the range is a bit wider than that…
Introduction We all know these FFT plots with a noise pattern. I see them all the time in Forums and other websites. The term Noise floor is always close… But is that also the Signal to Noise ratio (S/N ratio)? Or is this the noise voltage output from a voltage regulator for example? NO…
And how PCB capacitance spoiled the fist version… As you might have read, I am working on designing and building a tape head tube amplifier. For this you need quite some overall gain to overcome the gain losses in the equalization filter. Like at least 200.000; reason to split it up in 3 stages….
As mentioned in the earlier PR99 blog, I wanted to design and build a universal tape head amplifier. Just for fun and to see what I could squeeze out of the magnetic source, avoiding the internal Revox electronics. Which sounds great, but honestly I still do not get it as it is full with…
I started using this Blog-Site subdomain from dddac.com to blog my audio adventures 🙂 I will be starting to post here several topics and projects. As I have some projects done in the past, it will not be all very chronological, but more what I like to show for now – It will be…