M0NWK has a great blog and on there, he talks about making an effective EMC/NOISE REDUCTION MAINS FILTER. It consists of a bit of mains cable and a ferrite ring which is easily obtainable in the UK for around £15.
It takes just a few minutes to put it together and it is very effective. Inserting it into the mains feed of my shack has brought lower levels of noise. My FT-DX3000 has now become quieter still!!
All the details can be found on Adrian Leggett's blog.
> CLICK HERE <