Audiophilia

Space devoted to matters of High-Fidelity and Vintage Audio.

Here are my interests and knowledge in this area.

With particular emphasis I will publish information about modifications on CD players equipped with PHILIPS TDA1541A DAC.

There will be also a space, put at the disposal of any interested in the acquisition, or modifications of any CD Player with that particular DAC.

In construction...

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PHILIPS TDA1541A DAC

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TDA1541 Dual 16-bit DAC IMHO SIMPLY THE BEST DAC IN THE WORLD GENERAL DESCRIPTION The TDA1541 is a monolithic integrated dual 16-bit digital-to-analogue converter (DAC) designed for use in hi-fi digital audio equipment such as Compact Disc players, digital tape or cassette recorders. Features · Selectable two-channel input format: offset binary or two’s complement · Internal timing and control circuit · TTL compatible digital inputs · High maximum input bit-rate and fast settling time. QUICK REFERENCE DATA Supply voltages pin 28 VDD typ. 5 V pin 26 VDD1 typ. -5 V pin 15 VDD2 typ. -15 V Supply currents pin 28 IDD typ. 45 mA pin 26 IDD1 typ. 45 mA pin 15 IDD2 typ. 25 mA Signal-to-noise ratio (full scale sine-wave) at analogue outputs (AOL; AOR) S/N typ. 95 dB Non-linearity at Tamb = -20 to +70 °C typ. 1¤2 LSB Current settling time to ± 1 LSB tcs typ. 1 ms Maximum input bit rate at data input (pin 3) BRmax min. 6 Mbits/s Maximum clock frequency at clock...
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Sanyo OS-CON

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Here my favorite capacitor for digital: SANYO OS-CON (SPEC) Sanyo OS-CON is an electrolytic capacitor unlike other electrolytics. While the rest uses eletrolytic solution and manganese dioxide as  eletrolyte, OS-CON uses a high conductivity organic semiconductor. O rganic S emi CON ductor. What is great about using organic semiconductor?     High conductivity (low resistance value) compared to other electrolytes.     High conductivity - stability against temperature. OS-CON has almost the same construction as an aluminium electrolytic capacitor, and the element consists of rolled aluminium foils.   The difference between OS-CON and other aluminium electrolytics is that organic semiconductor crystal is impregnated instead of conventional electrolyte solution.  As a result, we are talking of Equivalent Series Resistance (ESR) that approaches that of film capacitors.   Impedance frequency characteristic of OS-CO...
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AYA II TDA1541A USB DAC

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Here some pics about my working on progress USB DAC: ● Non-oversampling, real multibit TDA1541A DAC, with synchronous DEM clocking; ● Master USB device (“asynchronous USB”), up to 384 kHz capable, with two low jitter clocks and galvanic isolation board; ● High quality parts, including Renesas and Toshiba semiconductors, Rubycon ZA capacitors, Elna Cerafine capacitors, Panasonic FC and FM capacitors, Black Gate (under the main board), Allen Bradley and Vishay carbon resistors; ● Ten fully separate supplies, with three stage common mode filters, and low noise, fully discrete, zero feedback regulators;
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