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DIY - you may not save money, but you can earn many ... fun, new knowledge, experience, ... even money at last


star A.C. Devices
star A.C. EMI Filter
star A.C. Spectrum Verion 2
star A.C. Spectrum
star Digital Oscilloscope
star Flat Top A.C.
star Isolation Transformer - Safer Power Supply ?
star Isolation Transformer
star MCB - For Testing
star Relay - Power Failure Manual Reconnection System
star Soft Start Circuit
star Soft Start Circuit 2
star Tube Amplifier
5Z3P, 6N9P, EL34

Useful Info.

star AWG Vs mm

My AV System

star System Info.
star Testing Result 2016-5-14
star Testing Result 2014-7-27

Case Opening

star Cambridge Audio
CA 351C
star KEF Q300 Speaker


star 5z3p 6n9p EL34
Tube Amplifier DIY kit
star AudioQuest USB A-B Forest 1.5m
star B&W 685 S2 speaker
star WireWorld RCA Luna 7 1m

Other DIY

star Medeco Lock Replacement
star Vacuum Pump for RC Oil Damper

Custom Search

DIYer was founded on 25 June 2014

Thanks Horology Zone's free support
Horology Zone

DIYer emphasises on HIFI and Electricity projects. However, I will also share the Home Repair experiences with you.

Although DIY is fun, it is dangerous because our projects are electricity related and power tools are used.

I only share my experiences and you take your own risk to follow ... ... Enjoy the adventure !


My AV System is updated on 2016 May 14
The simple FFT graphs are attached.


Isolation Transformer Relay - Power Failure Manual Reconnection System
Tube Amplifier KEF Q300 Disassembly