[BC] 9th FM harmonic causing interference

[Jeff Carter]

Begging the pardon of the list, but I do not understand reentrant harmonics.

What is this, exactly?  How does this happen?

Jeff/KD4RBG

On Wed, Feb 17, 2010 at 4:16 PM, Chuck Lakaytis <chuck at akpb.org> wrote:

>This is a problem that crops up with these harmonics.  Bandpass filters,
>second harmonic filters, etc do no protect against reentrant harmonics
>at those high frequencies.