ESPRITAUDIO: Amplifier

Showing posts with label Amplifier. Show all posts

Wednesday, 30 September 2020

18W Guitar amplifier EL84 12AX7

Amplifier on site

New Amplifier Board

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

Monday, 19 November 2018

Repair of KUSTOM KBA 100 Bass Guitar Amplifier TDA7293 100W

Kustom KBA 100 fix.
Transformer and TDA7293 IC Audio Power Amplifier Replacement.

The ultimate real analog synth for everyone UNO Synth

UNO Synth

IK multimedia combined his two decades of experience in software and hardware development with the expertise of Italian boutique synth-maker Soundmachines and IK’s synth guru, Erik Norlander (one of the brains behind acclaimed synths like the Alesis Andromeda).

Ik Multimedia unosynth

UNO Synth editor

Advanced synth control for Mac/PC and iOS

The UNO Synth Editor is a plug-in and standalone app that lets you access all the parameters of IK’s groundbreaking UNO Synth, the real analog synthesizer for everyone. The Editor lets you go beyond the front panel controls and access deeper programming settings like full 4-stage ADSR envelopes for both filter and amplitude, pulse width and waveform shape modulation of the oscillators, modulation wheel assignments, velocity control and much more. The Editor does not make sound on its own. Rather, it is a controller for the UNO Synth hardware that gives you remote control of this innovative instrument from your computer or mobile device.

UNO Synth editor Mac/PC iPhone/iPad

Monday, 5 November 2018

EL34 Triode Amplifier Single Ended 0 Feedback, 6SL7 e Mos driver & Phono MM input

Description:
StereoTube power amplifier.
Tube complement: two 6SL7, two EL34.
Configuration: EL34 connected in Single Ended Triode
Output power: 7W
Frequency response: 10Hz–30kHz, ±0.2dB
Input sensitivity: 770mV for rated power.
Rated load impedance: 4-8 ohms.
Damping factor: 5 at 1000Hz due to 0 Feedback Design

EL34 SE Amplifier 6SL7

Phono Stage for EL34 SE Amplifier 6SL7

Phono Stage for EL34 SE Amplifier 6SL7

Phono Stage power supply for EL34 SE Amplifier 6SL7

EL34 SE Amplifier 6SL7

Phono Stage for EL34 SE Amplifier 6SL7

EL34 SE Amplifier 6SL7 inside

Tuesday, 22 May 2018

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 .