Friday, August 22, 2014

6P14P SE Valves Amplifier.

This project has upgrade from  my old valves Amp.  from this link.
(  6GC5 valves has broken. i don't have any spare part lol XD)

Schematic use from link

Replace EL84 by 6P14p Valves and ECC01 by 12AT7 .
After modify picture.

first test 
conclusion after repair
1. Sound has more dynamic range than 6gc5.
2. more bass than 6GC5.
3. good sound impact for low db Speaker.

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Wednesday, November 7, 2012

Switching Power Supply 2500 W for PA Project

My first Switching Power supply AC to DC Converter Project.
PCB and schematic from Link.

Power Output +- 71 V DC
follow My blog : Led tv Buyer Guide

Thursday, October 18, 2012

TDA7294 Power Amp 100w chip amp DIY

Schematic for TDA7294
Power chip amp Project
Datasheet for TDA7294 you can search from
Print PCB layout by laser printer to paper and ironing to PCB

finishing PCB  ready to drill.
Back of PCB  place resistor 22k between pin 2 and 14

DIY B1 Firstwatt Buffer Preamp Clone


12 V AC Adaptor

Power Amp TDA 7294 for test.

Power Supply for TDA7294

 With Soken low cost speaker.

Tuesday, March 3, 2009

DIY LM3886t Subwoofer Project

2 x lm3886t Power Amp board from this link

Transformer 24-0-24 300Va for main power Amp.Rectifier and power supply board.

Lowpass filter use from this link
Transformer 18-0-18 VAC for Lowpass fillter circuit.Rectifier and regurator Board.
(useed 7815,7915)

Complete and ready for test.