High End Preamplifier Module for TA-E901

The Ultimate HI FI Design Sony ESPRIT

High End Preamplifier Module for TA-E901 and TA-E900 Sony #ESPRIT Replacement

All Resitors are 1206 SMD Thin Film 1% Tolerance

Two Layers PCB

Last Generation #BJT and J-FET

#ALTIUM

#SONY

#HIFIAUDIO

#higend

https://www.facebook.com/Espritaudio/

EL34 Triode connection Push Pull CFB Paraphrase Inverter Amplifer Schematic from Bartolomeo Aloia Project and Hammond Transformer

This is my first Tube Hi Fi amplifier, I choose to start from a  Bartolomeo Aloia project :
VTAF Volks Tube Amplifier The First by Bartolomeo Aloia
 you can find details on audiodesignguide page.

The project is based around a EL34 triode conection push pull.
The output transformer is a Hammond 1615 witch I would use in Chatode Feddbak connection.

Paraphrase imput stage and phase splitter is a  modified GY50 driver stage board .

Phase Splitter Prototipe Paraphrase inverter

EL34 triode push pull CFB amplifier schematic

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 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: 

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

DIY DC/DC Dual Boost regulated Power Supply for High Voltage Tube VAS

In relation to DIY Hybrid amplifer the first step is to obtain the High Voltage for tube's anode supply and the low voltage for heaters.

Sometimes, if not always, fora a 100W amplifier you have a double sec 150-300VA  36-0-36Vac power transformer only.
Using this board you can adjust the  needed voltage for tube stage starting from your transformer.
Without use any voltage doubler and linear regulators.

The Following image shows how the Double Boost works.

From unregulated  +55/0/-55Vdc the circuit gives at his output the needed voltage, able to supply the anode current for a tube stage.

For example you can obtain +90/0/-90Vdc and 6.3Vdc for the heaters..

DIY Do It Yourself KIT Headphones Hibryd 0fb Class A Tube Amplifier Using Boost Coverter Power Supply DC DC Coverter output 190Vdc 6.3Vdc starting from 12-24Vdc

Zero Feedback 100mW Hi Fi Tube - BJT Amplifer using Hi Voltage Power Supply by DC DC Boost Converter.

Boost and Buck Board provide to give:

VAS Tube Supply: 190Vdc
Curret Buffer Amplifer Supply: 30Vdc
Heater voltage 6.3Vdc by Step Down converter

All voltages obtained starting from 12-24Vdc power supply, as Desktop power supply or Battery

DC DC Step Up and Step Down Board

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)

"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

LM334Z

Current Buffer Stage Schematic

Top Layer and Components Amplifier Section

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

Vin=12Vdc

Vout1=200Vdc

Vout2=30Vdc

Vout3=6.3Vdc

 Top Layer:

SMPS Buck-Boost

"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

TUBE

The Second One uses ELNA Audio Silmic II Capacitors

The Second One With ELNA Silmic II Audio Capacitors

 Boards and Headphones

"AmpliSettembre" 100W Power Amplifier with Regulated Supply for VAS stage and BJT as output devices

Power Amplifier AB class named "AmpliSettembre", classic scheme using BJT as Power Output Devices.
Voltage rails of VAS and Input Stage are regulated in series mode.

"AmpliSettembre" 100W Power Project

Mosfet Amplifier 100W Example Schematic: AB class Principle Diagram

The Following Schematic is an Example about Easy Implementation of Mosfet Power Amplifier.
Power Supply is not regulated.
AB class operating.
100W could be obtained in 8ohm load.
Mosfet 2SK1058 2SJ162.Mosfet Amplifier Example Schematic

Mosfet Amplifier Schematic Example

Dowload PDF schematic document:

Mosfet Amplifier Example Schematic

Hybrid Headphones Amplifier Project, ECL82 (6BM8) plus Power BJT for 32ohm Philips Fidelio X1 With Tube Distortion

I'm looking for an Amplifier to drive my new 32 ohm impedence Philips Fidelio X1 Headphones.

My personal project is illustrated below:

Static Voltages

I would have a tipical Tube Distortion, I choose ECL/PCL to drive a Big BJT witjout other BJT drivers, not only 2SC3281, maybe I'll use 2SC2337 I bought from GB but potential fake....
Q3 should be change by 2 diode 1N4148 with related R25 value.
The amplifier factor should be not high, here is 5, there is no overall negative feedback.
Below the Simulation of distortion with V2(Vin)=1Vpk, V(R6)(Vout)=5Vpk F=1kHz

Second armoni c distortion for: V2(Vin)=1Vpk, V(R6)(Vout)=5Vpk F=1kHz

Static Currents

HeadPhones Amplifier Bandwidth

I hope I'll make it soon...