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star A.C. Devices
star A.C. EMI Filter
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
   

Unboxing

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
   

 

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Isolation Transformer
Part 12

After one week's Long Run Test, the Isolation Transformer works fine with my AV system. There is no over heat and no noise.

The total cost of this DIY Isolation Transformer is about HK$ 3000 / US$ 390.

All materials were bought from Mainland China through the Internet.

Isolation Transformer Schematic Diagram

This is the finalised design of my Isolation Transformer, you are welcome to use it, but ... ... take your own risk !!!

Since the A.C. power supply is good in Hong Kong, I think the improvement by this Isolation Transformer is not obvious.

Of course, there are many factors affecting the improvement or the judgement of the improvement:

  • My ear / eye performance

  • The materials of the Isolation Transformer is not HIFI grade

Anyway, I learnt a lot from this DIY Isolation Transformer.

Looking forward to next DIY project.

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