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

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.

Wednesday, January 7, 2009

New Year 2009 Gift SE Amp

New year gift SE 6GC5 tube amp.

I got a new year gift SE amplifier from senior DIY in thailand form this topic .

It is a first tube amp for me.
Very beautiful tube amp.

In use sound very perfect.

Thank you very much to Mr DIY.MOD for very beautiful tube amp.