Re: FCC

["Malcolm Watts" <M.J.Watts-at-massey.ac.nz> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

Hi Andreas,

On 16 Jul 00, at 13:04, Tesla list wrote:

> Original poster: "Andreas Marshall" <marand-at-t-online.de> 
> 
> I built a little twin System (1").
> When runin a distance of about 50cm (~20") from a Radio (FM),
> practically no disturbances can be heard. TVs in my House are also
> not affected.
> This is different, when the TC is not correctly tuned. Then some (not many)
> interferences occur.
> Why - i dont know

Because a tuned coil concentrates its power in a narrow 
frequency band. An untuned coil causes wideband splatter with 
all the input power covering a range of frequencies. I too 
have observed this.

Regards,
Malcolm
<snip>