ESPRITAUDIO: Pre Esprit

Showing posts with label Pre Esprit. Show all posts

Thursday, 3 January 2019

Auna AV2-CD508BT Hi Fi Amplifier to High End Preamplifier AUX bluetooth

How to made an economic High End Preamplifier.

My Auna CD508 project: from Hi Fi power amplifier to High End Preamplifier with Phono MM and MC.
The original amplifier has a switching power supply, the input selector is made by CD4052 and power amplifier is made by Texas Instruments AB class IC, LM1875 in bridge connection. The power rails voltage are +16/0/-16 Vdc and it as some features like tone control, BT connection balance, remote control , motorized volume knob, output relay, 3 inputs(4 with BT) , a tape recording output and a headphones out.
Estimated power output on 8ohm should be around 50W/CH.

Amplifier Auna AV2-CD508BT before mod

I dismounted the power amplifier section and I made a substitution with my Espritaudio Preamplifier modules: ESPRE

Preamplifier Auna AV2-CD508BT after mod

Bridge connection of LM1875

Thursday, 3 May 2018

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

Wednesday, 15 March 2017

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

Workig CD Player

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, 15 December 2016

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

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.