Tube Power amplifier using EL34 in Triode connection and CFB technique,paraphase inverter 12AX7

EL34 PP CFB

EL34 PP CFB

Complete Preamplifier DIY Line Amp, RIAA EQ. Moving Magnet MM. Moving Coil MC

Complete Preamplifier DIY  Line Amp, 

RIAA EQ.

 Moving Magnet MM

 Moving Coil MC

Sony Esprit TA-E901 Preamplifier Audio Module Replacement, Substitute, Spare revision 1

My own project about Sony Audio Module 
Amplifier board for Sony ESPRIT repair.
TA-E901 Flat Amp Preamplifier 

Sony CDP-X7ESD CD Player restoration KSS-190AFailure DIY Repair Fix

High End CD Palyer, Sony ES series, CDP-X7ESD with broken Optical Group KSS-190A

No Focus and No Tracking Lent's movement on CD insertion.

I found the flat cable broken.

Some pictures about my  work:

KSS-190A

KSS-190A  Broken Kapton Flat Cable on 90° corner 

KSS-190A

KSS-190A

KSS-190A

Workig CD Player

11

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

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: 

Sony Cassette Deck ES 3Heads Closed Loop Dual Capstan

Cassette Deck and analog sound passion!!!
A little dream has been realized:  my Sony TC-K777es and his little sister Sony TC-K666es !

Sony TC K777es Sony TC K666es

Sony TC K777es Sony TC K666es

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

Behringer A500 Amplifier mod Sony TA F80 PLPS Power Supply and TA F902 similar circuit

I'm working on cheap Berhinger A500 case , putting inside a Sony TA-F80 PLPS supply and  Sony TA N902 Esprit Non NFB Power Amplifer clone board ...

Sony PS-X65 DD Turntable Repaired Restored

Sony PS-X65, trouble of drop point solved.
IC103 defective, once replaced the turntable plays well!!

Signals on pin 1 and 4 weren't correct, Luckily t was only the 4069 IC...

Faulty Component, datacode 79 48

My replacement..NOS MC14069UB datacode 80 36

Sony PS-X65 DD Turntable Quartz X TAL-LOCK System Full Electronic Microprocessor Controlled Magnetic Tracking

My New entry, not working, turntable Sony PS-X65 substitue of other Sony Direct Drive Turntable

 Sony PS-X60. Only better S/N ratio for the specs, but it has more charm.

Speed is correct and Locked, both 33 1/3 and 45 rpm, in manual play it's perfect only a little trouble on the mute switch, easily solved.

In automatic play tonearm doesn't stop and doesn't retun to stop position...

Quartz X TAL-LOCK SYSTEM

It Spinning well!

It look so beautifull..

Automatic actions are guarantee by 2  electronic controlled motors, no mechanicals devices like his predecessor, PS-X60.
The Horizontal motor is used also for the correct Traking Force

There are 2 coaxial "brushless" motors: one for the lift the other,
you can see the coils, for the Horizontal Movement

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

Sony TA F770es ES series 
Mosfet amplifier 100W

Sony TA F770es pt.1