Friday 30 November 2018

Yamaha C-4 Preamplifier Input Knob Selector Repair









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).






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


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

EL34 Push Pull Amplifier triode connection prototype DIY



EL34 amplifier prototype


Description: 
StereoTube power amplifier.
Tube complement: eight 12AX7, four EL34.
Configuration: EL34 connected in Push Pull triode configuration
Output power: 15W
Frequency response: 10Hz–30kHz, ±0.2dB
Input sensitivity: 1000mV for rated power. 
Rated load impedance: 8 ohms. 

Damping factor: 11 at 1000Hz 











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 .



Phase Splitter Prototipe Paraphrase inverter



EL34 triode push pull CFB amplifier schematic