[sdiy] Mains interference

[Mattias Rickardsson]

On 28 March 2014 11:00,  <rburnett at richieburnett.co.uk> wrote:
>
> Appologies if some people feel this is a long-winded explanation, but it's
> something that most people have experienced.  Particularly the mobile phone
> morse-code.  EMC is also often portrayed as some sort of black art.  This is
> one area where it greatly helps to understand the mechanism by which
> something happens when trying to resolve it.

Sounds sound. :-)

> The easiest solution to this problem is to change the wire length, or better
> still slap on a ferrite sleeve to keep RF currents out of the wire in the
> first place.

Would an overdose of ferrites and ferrite sleeves be a good general
advice for studio connections and circuit design?

Module PCBs often have small ferrites on incoming power rails, "just
to be sure". These cost next to nothing, and could easily be placed on
all incoming and outgoing audio & CV connections as well... if it
helps in preventing RF problems?

/mr