DIY Headphone Hybrid Amplifier Schematic Simulation

To semplify last project I choose to exchange Current Generator by a simple Resistor.
Power dissipate is about 4W so this component, 60ohm, shoul be composed by 2x120ohm/5W resistors.

Semplified schematic

Distortion increase, third harmonic

Distiortion increase, Vin=1Vpk, Vout=5Vpk but the power on the Haedphone is 400mW near the maximun power admitted, 500mW.

At 3Vpk out:

3Vpk output

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...

Sony DTC-1000ES Digital Audio Tape DAT with Sony CX20018 ADC and Philips TDA1541A DAC inside

Sony DTC-1000ES DAT Player

Not Working, but very beautifull Player!
Elna Audiograde Capacitors.
Philips TDA1541A - SAA7220P/B Chipset for DAC
Sony CX20018 for ADC

Sony CX20018 ADC 

Philips TDA1541A

To restore and repair.....

HTA: Hitachi Top Mosfet Amplifier 100W Project Using 2SK1058 2SJ162

 Hitachi Top Mosfet Amplifier Project

All Semiconductors, BJT - Mosfet.
Only Schematic.

Download Mosfet Amplifier Schematic pdf

Description:
HTA: Hitachi Top Amplifier
B Class Mosfet Power Amplifier, using Hitachi's Mosfets 2SK1058-2SJ162.
Input differential stage and VAS stage are like Sony's ES 90's  amplifer.
VAS is Cascode Configuration.
Output Stage use 4 devices, 2 N channel MOS and 2 P channel MOS, note the power voltage rail is NOT regulated, the signal voltage should be... anyway they must be separated.

100W Continuos Power into 8 ohm could be obtained with appropriate Power Supply

Hitachi's Mosfet Amplifier Project 

My Personal GY50 Hybrid Amplifier 50W 8 ohm

My Personal Copy of Famous Aloia Hibrid Amplifier GY50. Amplificatore GY50 .

Amplifier using Vacuum Tube, ECC83/12AX7, for VAS Stage and Triple Stage of Emitter Follower in the Output Power Stage.
Power Output Devices; Toshiba 2SC3281 2SA1302.
All Regulated Power Supply.
No Overall Negative Feedback.
50W/8ohm, THD<1%
Made by Altium Design / Protel  CAD Database


Schematics:

Regulated Power Supply of  Power Stage

Output Power Stage Triple Emitter Follower

Vacuum Tube VAS Stage

Vacuum Tube Power Supply 

Amplifier and Power Supply  PCB , Printed Circuit Boards:

Power Output Stage, Output devices 2SC3281-2SA1302

Signal VAS Prited Circuit Board 12AX7/ECC83

Signal Stage Power Supply

Current Buffer Regulated Power Supply