Clean Mains Connections = Good Sound

I recently bought a second-hand tuner, an Akai AT-550.  The condition of the mains plug pins was the worst I have ever seen.  Even though the connections pass relatively high voltages, they still need to be clean or sound quality will be affected.  I am particularly fussy about the earth pin connection.  Here is a picture of the tuner:

Akai AT-550 Tuner.

Akai AT-550 Tuner.

To clean the brass pins of corrosion and dirt, I use a fibreglass stick but sandpaper or even a knife can be used.  If you have the confidence, it’s worth taking a look inside the plug to make sure all three connections are good and that the fuse connections are not corroded or lose.  This shows the plug:

Showing the mains plug earth pin badly corroded.

Showing the mains plug earth pin badly corroded.

Showing the mains plug earth pin partially cleaned.

Showing the mains plug earth pin partially cleaned.

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Showing the mains plug earth pin fully cleaned.

I cleaned all three pins, not just the earth and when finished, they were all shiny.

If anyone needs an explanation of how to connect a mains plug properly, please do ask me and I will upload a post showing how to do it – not everyone knows.

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About Matal

Hand made HiFi, photos, a friends poetry.
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