Philips Amplifier RH 521 Revisited Class AB 50W Project

Power section of Philips RH 521 70's Calss AB Amplifier modified in:

Full Complementary Output Power Stage, Thoshiba 2SC3281 2SA1302 or Sanken 2SC3519 2SA1386

Cascode for VAS Stage

Feedback amount changed

Philips RH 521 Amplifier 

Distortion at 20Vpp

Philips CD104 CD Player 2x14bit DAC TDA1540 SAA7020 SAA7030

My Old But Working CD Palyer Philips CD104
My oldiest CD Palyer, made around 1986
14bit only DAC and Oversampling

Philips CD104 front

Philips CD104 inside

Philips CD104 DAC  2 x TDA1540P

Philips CD104 rear , Original Cables, Big Heat Sink

Bitstream Philips chipset SAA7350A TDA1547 DAC7 on CD950

Bought "new" not working CD Player: Philips CD950
Digital to Analog Conversion based  on Bitstream  mode
Philps Top Player of the 90's with Gold Bitstream Logo

Philips Bitstream Conversion Logo

SAA7310 - SAA7350 -  NPC SM5840AS

SAA7350 is half part of DAC7

TDA1547

TDA1547 is the other half part to complete DAC7

NE5532

NE5532N Operational Amplifier

Palyer goes sometime , and when not disc runs anticlockwise

Sony DTC-1000ES Digital Audio Tape DAT with Sony CX20018 ADC and Philips TDA1541A DAC inside

Sony DTC-1000ES DAT Player

Not Working, but very beautifull Player!
Elna Audiograde Capacitors.
Philips TDA1541A - SAA7220P/B Chipset for DAC
Sony CX20018 for ADC

Sony CX20018 ADC 

Philips TDA1541A

To restore and repair.....

My Sony ES HI FI system

About Sony:
Integrated Amplifier    TA-F555ES
Cassette Deck          TC-K777ES
CD Player                 CDP-701ES
CD Player                 CDP-501ES
CD Player                 CDP-502ESII

About Philips:
Speakers                  FB-821
CD Player                 CD-650

About TEAC:
Cassette Deck          V9000 Esoteric
Cassette Deck          V5000

About Yamaha:
Cassette Deck          KX-670

About Technics:
Turntable                  SL-1410