Category: Measurement

TDA 1541a 1 µF vs 100 nF on MSB

Some Measurement  with 1 µF vs 100 nF  some say it sounds better  . Tested on staggered TDA1541a Board with 1µf on MSB Multitone -20 dBfs – spectrum 20 – 96 kHz Red 100...

Sound decoupling caps TDA1541a

After reading A Monolithic Dual 16-Bit D/A Converter IEEE JOURNAL OF SOLID-STATE CIRCUITS, VOL. SC-21, NO. 3, JUNE 1986 HANS J. SCHOUWENAARS, EISE CAREL DIJKMANS, BEN M. J. KUP, AND ED J. M. VAN...

Grundig DEM modification Adapter

Small handy grundig DEM modification adapter board Original DEM clock signal Grundig DEM , DEM-FREQ sync aan Wordclock 176.4 kHZ 16 Bit unditherd Silence Original DEM vs Grundig DEM Clock 10 Hz – 20...

CD 650 Filter output

Measured the filtered output CD650 Sweep 10 – 20 kHz , 0 dBFS AES17       White Noise      

Transformer I/V TDA1541A s1

Een Marantz CD94Mk2 ter reparatie  met twee trafo’s, Ik denk SOWTER TYPE 1465 https://www.sowter.co.uk/specs/1465.php SOUND IMPPROVEMENTS USING DAC TRANSFORMERS The sound quality of almost any commercial CD player or digital music systems can be improved by...

S/P-Diff Reciever in DIY DAC

  J-Test with CS8412 1m Coax 75 Ohm  = 762 pico 5m Optical = 762 pico   WM8804 with xtal 1m Coax = 125 pico WM8804 with xtal 5m optical = 125 pico   WM8804 with...