Tuesday, 13 January 2015

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


Friday, 12 September 2014

Luxman LV-105 Style Hybrid Amplifier 100W Simulated Project 6DJ8 (ECC88) Hitachi Mosfet 2SK1058 2SJ162


Similar to basic schematic of Luxman LV-103 / LV-105 , this project is made by only 3 simple stages: 

  1. Input stage: is a BJT cascode(Q8,Q9) with current sink(Q11)
  2. VAS stage: is a 6DJ8 (ECC88) SRPP (X7,X8) buffered by a emitter follower BJT (Q10) with MOSFET current sink (M9)
  3. Output stage: is a B class Mosfet Push Pull  with two couple of 2SK1058 / 2SJ162  Hitachi 


100W Schematic 


Simulated FR


Simulated Distortion 0.041% at 32Vpp out




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