Monday, 31 March 2014

"Operazione Goodnight" Tube & BJT Hybrid Class A Headphones Amplifier Project Schematics Layers SMPS Power Supply

My Goodnight Tube Headphone Project Schematics  
SMPS Power Supply 

Triode Amplifier Section ECC82 ( 12AU7)

Voltage Tube Amplifier Stage Schematic

Class A BJT Emitter Follower Current Buffer 
2SC2238 2SA968 
2SC1815 2SA1015
Current Buffer Stage Schematic

Top Layer and Components Amplifier Section

Switching Power Supply Based on Texas Booster Driver IC LM3478 and Buck IC LM22673.


 Top Layer:

SMPS Buck-Boost

Sunday, 30 March 2014

Sony TA-F770ES ES Series MOSFET Amplifier 100W " MOS FET Power Stage" Toshiba 2SK1529 2Sj200

SONY Integrated Stereo Amplifier TA-F770ES
Spontaneous Twin Drive
Super Legato Linear
Gibraltar Chassis

MOS FET Power Stage F770ES

Toshiba 2SJ200 and Drivers

Inside View


Tuesday, 18 March 2014

"Operazione Goodnight" Headphones Amplfier Using Vacuum Tube ECC82 ( 12AU7)

My  Project about a Vacuum Tube Headphones Amplifer for my Philips Fidelio X1:

My Tube Amplifier and My Headphones Philips

My Headphone Tube Amplifier 
Tube used for amplifier is a ECC82/12AU7 followed by a discrete Class A BJT Buffer
The First One mede uses ELNA Cerafine Audio Capacitors.
The Power Supply is my Board made by a mix of  Bust and Buck Switching Converters from main 12-24Vdc
So  From DC Supply we can obtain: 200Vdc for Tube circuit, 30Vdc for Buffer Circuit, 6,3Vdc 

"Goodnight" Powe Supply Board 

Switching Board with IC, Mosfet and Audio Board with Philips Miniwatt NOS ECC82  12AU7

NOS ECC82 Philps Miniwatt and Switching Power Suupply Board

Headphone Amplifier complete with a White Led on the base of Tube


The Second One uses ELNA Audio Silmic II Capacitors

The Second One With ELNA Silmic II Audio Capacitors
 Boards and Headphones

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

Saturday, 8 March 2014

Yamaha AX-550 RS Amplifier 2SC3281 2SA1302

Restored Amplifier AX-550 RS
Working Condition

AX-550 RS Amplifier

AX-550 RS Amplifier ELNA for Audio Capacitors

AX-550 RS Amplifier ELNA for Audio Capacitors

AX-550 RS Amplifier ELNA for Audio Capacitors

AX-550 RS Amplifier ELNA for Audio Capacitors

Sony TA-F570ES Amplifier 100W Gibraltar Chassis

My New, Not Working, Sony ES Amplifier

Sony TA-F570ES


2SC2921 2SA1215 in Gibraltar Chassis