Posted 29th March 2010 at 01:33 AM byquanghao Updated 29th March 2010 at 02:16 AM byquanghao
INTRODUCTION
After the good result obtain with the DAC End I have design with Nguyen Quang Hao a set of boards to create a cheaper project with a sonic performances very near.
The No Oversampling DAC give a more natural sound but if you ear the TDA1541 and TDA1543 seem to lose details.
The AD1865N-K with passive I/V give a perfect combination, natural sound and all the details.
The AD1865N-K give the better performances with a 200ohm MK132 Caddock as passive I/V.
In this configuration the output signal is too low to drive any amplifier so I have design for the AD1865N-K the better output stage.
This DAC use a single ended vacuum tube amplifier without the expensive output transformers used in my original DAC End.
The DAC board follows the original design but has been inserted a jump to switch the phase of output signal.
In any vacuum tube stage the signal on the anode is in out phase...
Posted 20th August 2011 at 08:32 AM bydvb-projekt Updated 4th April 2012 at 07:13 AM bydvb-projekt(Stock status updated)
The Red Baron
aka TDA1541A DAC V3.0
The evolution brings the following changes
- Direct shunt voltage inputs with shortest onboard traces
- I2S In-/Outputs with shortest onboard traces
- Upgrades DEM Synchronizer
- Onboard Grounded-Gate MOSFET Current Buffer I/V Stage
(-ecdesigns- MK7 version)
- Compacter design
Still on the module
- Separate GND-Trace for DEM-Synchroinizer
- Master/Slave connectors for parallel DAC module usage
and external I/V Buffer stages e.g.
Tube-I-zator & DDNF Stage
- Groundplane
- no SMD Design
The PCB has the following data:
Material: FR4 - 2mm
Layers: 2
Board size: 125x73 mm
Posted 17th February 2011 at 03:44 PM byBoofers Updated 25th March 2011 at 12:42 PM byBoofers
If I could pass one piece of knowledge onto every person in the electronics industry it would be this: always flush cut your cable ties. I am tired of having my forearms sliced up by sharp cable ties every time I reach inside a piece of equipment. So remember, safety first, cut your ties flush. Besides, flush ties just look nicer.
Posted 20th August 2009 at 07:40 AM bykeantoken Updated 20th August 2009 at 09:31 AM bykeantoken(Adding a pretty picture...)
Hi all. Apparently, this is the first blog post of the new DIYAudio (unless the new software is fooling me).
Sooo...... What would someone like me want to blog about? All I can really do is post links to my threads and post pictures of my ideas. I don't really have enough to contribute which would warrant a regular blog...
One thing I think deserves mention is the thread below about the Allison output stage. Surely there are more interesting things to talk about, things more pertaining to audio (there is generally a sort of Zen approach where even though a circuit may measure well, there may be other ways of doing it that sound better).
The significance of the Allison, to me, is its measured performance as a voltage buffer. You still need a low source impedance because the input impedance...
