ESPRITAUDIO: 2SA

Showing posts with label 2SA. Show all posts

Thursday, 2 March 2017

Sony TA N902 N900 N901 Esprit Solid State Class A Amplifier Clone II Switching Dual Power Supply

DIY
My Sony Esprit Clone Power Amplifier!

Power Boards Hetasink

Switching power supply

Thursday, 5 January 2017

Sony TA N 902 Esprit Solid State Class A Amplifier Clone

Sony Esprit TA-N902 Power Amplifier:

My design about Sony's clone, power part simulation:

Tuesday, 22 November 2016

Next Power Amplifier based on Sony Esprit Series Using No Negative Feedback Architecture

I'm traying to make an amplifier following example of Sony TA-N902 Esprit Sere, the last aftre TA-N900 mono and TA-N901 stereo.
Sony's Esprit amplifier all haven't Negative Feedback, they had a Voltage Amplifier Stage made by discrete components, which has his proprer feedback and a current stage located out the loop, This architecture decrease the TIM distortion. To minimize THD Sony used his own patent concerning non-switching power devices, the stage also remain a AB class but results similar to pure class A.

3D of the Voltage Amplifiere Stage

Some amplifier are been used as example for schematic or as components donor.

Power supply is from a PLPS from an old TA-F80,electronic components for VAS are coming from a TA-F500, the chassis is given by a broken Behringer A500.
Other components are new and PCB are made by myself.

Current Amplifier 3D

I used a lot of SMD components, all with 1206 dimension

Soon I'll show the complete work

Thursday, 29 September 2016

My new GY50 50W Hybrid Power amplifier DIY Board
IRFP240
2SC3281 - MJL3281
2SA1302- MJL1302

Audiograde output capacitor

"ready to run" GY50 Boards

Friday, 22 August 2014

Sony TA-F555ES Amplifier 100W

Sony TA F555ES Amplifier
ACT : Audio Current Transfer
Shunt Regulated Power Supply for Signal Section
Big BJT Discrete Phono, EQ, Board including MC and MM Load Selector
Elna for Audio Capacitors
Sanken Power BJT: 2SC2922 2SA1216

Sony TA-F555ES front view

Regulated Shunt Power Supply Regulator

Audio Current Transfer...

Sony Power

Attenuator

EQ Board, Discrete BJT Phono stage including MC cartridge amplifier

Cartridge Load Selector

Sony TA-F555ES inside View

Tuesday, 5 August 2014

Sony TA F80 ; Power Amplifier 120 + 120W, PLPS Power Supply, Restoration Project pt.II

Amplifier Sony TA-F80 :

Sony TA-F80

Sony's Knobs after clean

TA-F80 power board with Heat Pipe and power BJT, NEC 2SC2681 instead Sony 2SC2571 from factory..

Sony Power Board Before Restoration

Input and EQ Control Boards

Sony Japan RIAA - UNIT

Pulse Loked Power Supply PLPS:

TA-F80 Amplifier Inside

Wednesday, 30 July 2014

Sony TA F80 ; Power Amplifier 120 + 120W, PLPS Power Supply, Restoration Project

Sony TA-F80 Power Amplifier

Low Noise Head Amp, Sony's BJT 2SC2014
120 +120W continuos (8ohm)
Pulse Loked Power Supply
Heat Pipe

Low Noise Head Amp MC

2SC2014 is a Low Noise BJT developed for MC Stage Amplifier

Phono RIAA Amplifer Q201 2SK97

BJT Power Amplifier , Fet Input Diff. Amp.

PLPS Power Supply Pulse Power

Tuesday, 15 July 2014

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

Friday, 4 July 2014

Project About Aloia's TriodoSolido Style Hybrid Amplifier 100W

Clone of Aloia's Amplifier called Triodosolido.
Semplified versione whitout Protection and Limiters circuits

Tubes are 2 x 6SN7 double triode.
Output BJT 2SC3281 2SA1302
Tube VAS Supply300Vdc
Catode Follower Rail Supply: 50Vdc, -50Vdc
No Negative Feedback (0 Negative Feedback)