Topband: Minimum distance of noise generator

[Ulrich Weiss]

hello topbanders,

Dick, W7WKR wrote:

> I would suggest building a simple wideband noise source good for any
> reasonable band of interest. Examine the wideband noise circuit used by
> noise-bridge impedance measuring devices (one in HR back in the 80's comes
> to mind) for generating a wideband noise source. Amplify this noise and
> apply it to your source antenna.

what is the minimum distance (in wavelengths) for reliable (far field) 
results???

greetings from Germany

Uli, DJ2YA

 *******************************
     Ulrich Weiss
Am Birkenstrauch 15
D-57334 Bad Laasphe
   +49-2752-6462