Easy Super Clamp Mains Filter Clone DIY

It is possible to make a SuperClamp plug like the ones Russ Andrews sells for £20 using a standard UK mains plug and a few parts. Total cost is a few pounds. Simply take any UK mains plug, the MK ones are better since they have more space inside them but I managed with a Volex one. Inside the plug you need to connect a varistor across Live and Neutral. If there is enough space you should use 2 in parallel. That is it !! You can take this a step further and connect a varistor across Live and Earth and one between Neutral and Earth. They are very low capacitance like a typical Y-Class Cap and act as such here until clamping a spike. Blank the cable entry with a rubber grommet or some sealant if you wish.

 

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Easy Super Clamp Mains Filter
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Easy Build Audio HiFi Mains Filter DIY

An alternative to the full DIY mains filter build in the previous article is to use a standard chassis filter make by either Roxberg or Schaffner. These are off the shelf parts that come assembled in a metal box with input and output tags for L, N,E. They can be selected based on the current rating you require and have various choke sizes.

Choose a filter with a large inductance choke (10mH) for a source component filter like CD players, DAC, pre-amp or small integrated amplifiers for example. Use a smaller inductance (higher current rating such as 10A) for large dedicated power amp filtering. A mid range inductance (5mH) is fine for a computer based filter or more general audio use. The chassis filters can be bought from RS components, CPC and even on ebay occasionally.

Easy Build Audio HiFi Mains Filter
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Audio Hi-Fi Mains Filter DIY

This is a full mains filter build that can be made with or without the chokes if you wish. The first picture shows the unit I made in a simple ABS case. This filter is a complete DIY solution where you make the circuit yourself, either on a PCB, vero-board or tag strip.

The sonic benefits of any mains filter is subjective at the best of times. Some people swear by them and others dislike them. I have always preferred my system with some kind of filtering and cannot see the purpose of using high grade audio mains leads without a filter circuit before them. The filter isolates the audio grade mains lead from the yards of twin and earth grey cable under the plaster and the miles of cable to the local sub station on your phase.

Audio Hi-Fi Mains Filter
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Lossless Audio Checker for Linux and Windows

auCDtect is a useful too used to check the the validity of lossless files. The regular tar packaged version does not work without tweaking by installing old compat libs which are not always available on some Linux systems.

Here are static compiled binaries for both Linux and Windows based systems. On Linux Copy it to /usr/bin and it should run fine. So far it has run on all versions of ubuntu from 10.xx upwards. auCDtect is a command line driven tool. For those that prefer a GUI based tool you can use LAC (Lossless Audio Checker).

** Linux and Windows Downloads Attached **

 

auCDtect Checker for Linux

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