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DDDAC

Sharing my DIY audiophile Projects

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Welcome to the world of DDDAC!

Welcome to the world of DDDAC!

2020-07-02 Doede Douma (DDDAC) Comments 4 comments

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…

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10 years DDDAC
10 Year Anniversary of the DDDAC1794

10 Year Anniversary of the DDDAC1794

2023-01-28 Doede Douma (DDDAC) Comments 2 comments

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…

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DDDAC Clock Switch Project
Clock Switch Project (clock series part 6)

Clock Switch Project (clock series part 6)

2021-12-02 Doede Douma (DDDAC) Comments 11 comments

Final clock upgrade for my DDDAC This is supposed to be the last and “final” blog about clocks. In the previous parts I did a lot of testing and reviews on all kind of oscillators for use in a DAC and for use with Ian Canada FiFoPi and Reclocker (The reclockPI). Ultimately, for me…

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NewClassD Neutron Star 3 Clock comparison
The Clock Reviews (part 5)

The Clock Reviews (part 5)

2021-11-09 Doede Douma (DDDAC) Comments 9 comments

NewClassD Neutron Star 3 Clock Daniel from Berlin was so kind to send me this summer (yes sorry for late response and post !) his newly acquired NewClassD Neutron Star 3 Clock for comparison with the Andrea TWTMC (The Well Tempered Master Clock). The comparison was not 100% apples and apples as this was…

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Jürgens Clock Bottom
The Clock Reviews (part 4)

The Clock Reviews (part 4)

2021-07-05 Doede Douma (DDDAC) Comments 12 comments

Today Tests What’s on the menu today? A short meal this time, but hopefully as interesting as short 🙂 “Jürgens” Clock – with thanks to Mamal from Berlin Listening to the possible impact of power supply to the Andrea Clock Jürgens Clock Mamal from Berlin wrote me an email after reading the earlier posts…

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Categories

  • Arduino (6)
  • Digital Audio (9)
  • Electronic Design (8)
  • General DIY (14)
  • Loudspeakers (1)
  • Music (2)
  • Reel to Reel (4)
  • Suppliers (1)
  • Test & Measurement (6)
  • Tip of the Month (1)
  • Tube Amplifiers (4)
  • Turntables (1)
  • Tweaking (7)
Clock Test 3-1
The Clock Tests (part 3)

The Clock Tests (part 3)

2021-06-29 Doede Douma (DDDAC) Comments 11 comments

The test goes on… This time mostly thanks to Stefan Wapstra, who was so kind to send me three 45Mhz Clocks. The First version of Andrea’s DRIXO Driscoll clock PCB, a Crystek CCHD-957-25 and the standard Clock delivered with the FiFoPi Q3. Next to those I had the Accusilicon Clocks 318 and 338 warmed…

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Clock warm holder and comparator
ANDREA’s CLOCK (part 2)

ANDREA’s CLOCK (part 2)

2021-06-07 Doede Douma (DDDAC) Comments 5 comments

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…

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Sowter DDDAC OPT
The DDDAC Sowter OPT

The DDDAC Sowter OPT

2021-05-13 Doede Douma (DDDAC) Comments 4 comments

More background on this special DDDAC output transformer (OPT) Already in the very early days of the DDDAC I wanted to be able to use the PCM1794 to it full content in Mono Mode by means of an OPT. This would give the following benefits: Effectively doubling the number of DACs (like doubling the…

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Andrea Clock Test Set-Up on DDDAC1794
Andrea Mori’s low phase noise Clock

Andrea Mori’s low phase noise Clock

2021-05-02 Doede Douma (DDDAC) Comments 4 comments

Introduction Are we in agreement, that DACs are sounding better when a good quality low phase noise clock is being used? Yes? keep reading… There is a lot of information and good articles on this topic, so I will keep it brief and not go in all possible backgrounds of phase noise, clocks and…

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Renovating my Workshop

Renovating my Workshop

2021-04-18 Doede Douma (DDDAC) Comments 3 comments

A fresh new setup after 15 years… Now that I will spend more time in my work shop, it was about time to get things fresh and renewed. After many (15) years of organic and chaotic growth I wanted to get things more organized and all test equipment and work space more handy. Well…

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Categories

  • Arduino (6)
  • Digital Audio (9)
  • Electronic Design (8)
  • General DIY (14)
  • Loudspeakers (1)
  • Music (2)
  • Reel to Reel (4)
  • Suppliers (1)
  • Test & Measurement (6)
  • Tip of the Month (1)
  • Tube Amplifiers (4)
  • Turntables (1)
  • Tweaking (7)
Happy Easter! What’s cooking?

Happy Easter! What’s cooking?

2021-04-02 Doede Douma (DDDAC) Comments 2 comments

A small update from the DDDAC world It is hard to be consistent in ones blogging I must admit. LOL, I thought I would be constantly blogging after I quit my busy day job one month ago. I spent the March month to pick up on many things which were lying around in my…

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Ultracap 6x
My UltraCap experiments

My UltraCap experiments

2021-01-23 Doede Douma (DDDAC) Comments 0 Comment

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…

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DDDAC Power Supply
DDDAC Power Supply (background and tweaks)

DDDAC Power Supply (background and tweaks)

2021-01-17 Doede Douma (DDDAC) Comments 4 comments

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…

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Noise AP basic tests v1 loop back
“Noise Floor” and S/N ratio in and with FFT plots

“Noise Floor” and S/N ratio in and with FFT plots

2020-11-26 Doede Douma (DDDAC) Comments 1 comment

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…

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DDDAC - MU Follower Module for 5755 and ECC83 close by
The DDDAC Mu-Follower Module

The DDDAC Mu-Follower Module

2020-10-18 Doede Douma (DDDAC) Comments 2 comments

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….

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Categories

  • Arduino (6)
  • Digital Audio (9)
  • Electronic Design (8)
  • General DIY (14)
  • Loudspeakers (1)
  • Music (2)
  • Reel to Reel (4)
  • Suppliers (1)
  • Test & Measurement (6)
  • Tip of the Month (1)
  • Tube Amplifiers (4)
  • Turntables (1)
  • Tweaking (7)
Cleo 7 project 32
Upgrading my CLEO 6 Tube preamplifier to CLEO 7

Upgrading my CLEO 6 Tube preamplifier to CLEO 7

2020-10-11 Doede Douma (DDDAC) Comments 8 comments

Introduction For many years now, I have been using Dick’s (Audio Creative) N30P Mu Stage Design. He called it the Cleo 6. It is a great double mono MU-Stage amplifier (see circuits) with top components. Over the years I started to see the benefit of using Arduino computer boards as a control tool, so…

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Cleo 7 project 22
Cleo 7 Picture Gallery

Cleo 7 Picture Gallery

2020-10-08 Doede Douma (DDDAC) Comments 1 comment

Sometimes pictures tell more than a thousand words… Here is a nice photo story of the construction of my CLEO 7Tube Pre Amplifier

High Voltage Danger
DIY Warning – High Voltages

DIY Warning – High Voltages

2020-10-02 Doede Douma (DDDAC) Comments 0 Comment

Somehow I feel, that this should not be necessary, but experience shows that this WARNING is absolutely needed over and over again… All my projects are working with high voltages. 230V AC mains or even over 500 Volt DC voltage in tube amplifiers. These voltages does not only hurt like hell if you touch…

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PCBs MU-Stage CCIR NAB Filter - HV PSU-b
Reel to Reel Taperecorder Equalization

Reel to Reel Taperecorder Equalization

2020-08-23 Doede Douma (DDDAC) Comments 8 comments

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…

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Revox PR99 mk3
My new Revox PR99

My new Revox PR99

2020-08-19 Doede Douma (DDDAC) Comments 2 comments

Rediscovering Reel to Reel I recently re-discovered the joy of Reel to Reel music reproduction. I started with an old, somewhat refurbished 4 track NAB Revox B77 with 3.75 and 7.5 ips speed. I use this one for the simple work, experimenting with electronics and playing the wonderful old pre recorded tapes from the…

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Categories

  • Arduino (6)
  • Digital Audio (9)
  • Electronic Design (8)
  • General DIY (14)
  • Loudspeakers (1)
  • Music (2)
  • Reel to Reel (4)
  • Suppliers (1)
  • Test & Measurement (6)
  • Tip of the Month (1)
  • Tube Amplifiers (4)
  • Turntables (1)
  • Tweaking (7)
Building your own Audio rack

Building your own Audio rack

2020-07-03 Doede Douma (DDDAC) Comments 0 Comment

This is just a gallery – It speaks for itself I hope 😉 – I will add text later (Still lots of WIP for my blogging site !) Views: 702


most recent posts

  • 10 Year Anniversary of the DDDAC1794
  • Clock Switch Project (clock series part 6)
  • The Clock Reviews (part 5)
  • The Clock Reviews (part 4)
  • The Clock Tests (part 3)
  • ANDREA’s CLOCK (part 2)
  • The DDDAC Sowter OPT
  • Andrea Mori’s low phase noise Clock
  • Renovating my Workshop
  • Happy Easter! What’s cooking?

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  • Doede Douma (DDDAC) on 10 Year Anniversary of the DDDAC1794
  • Paulus on 10 Year Anniversary of the DDDAC1794
  • 10 Year Anniversary of the DDDAC1794 - DDDAC on Clock Switch Project (clock series part 6)
  • 10 Year Anniversary of the DDDAC1794 - DDDAC on The DDDAC Sowter OPT
  • bart wolters on Andrea Mori’s low phase noise Clock
  • Doede Douma (DDDAC) on The Clock Tests (part 3)
  • Gaston on The Clock Tests (part 3)
  • Doede Douma (DDDAC) on The Clock Tests (part 3)
  • Gaston on The Clock Tests (part 3)
  • jeremysk on DDDAC Power Supply (background and tweaks)

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DDDAC LIN LP12 clones with Kandid
High Voltage Danger
High Voltage Danger
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