Noise floor pumping with strong signals elsewhere on the band

  • 3
  • Question
  • Updated 2 years ago
I just got my second 6500 on the air. I notice the 40m noise floor moving up and down 5-10db when strong signals are on the band (~S9+). I can copy the strong CW signals 5-10, even 20 KHz away from the generated phase noise. My other unit doesn't show this kind of behavior.

In DX pileups and contest conditions, this all but makes the radio operate in the same class as my IC706. In other words, unusable. 

RF gain set to minimum, filters to sharp. Am I missing some kind of setting?

Running the latest SW with my Maestro.

Photo of K9SO


  • 100 Posts
  • 19 Reply Likes

Posted 3 years ago

  • 3
Photo of G8ZPX


  • 197 Posts
  • 110 Reply Likes
Official Response

This is symptomatic of a known WNB problem where it cannot deal with high level close-in signals. Try turning off the WNB and see if the behaviour changes.

Also, see here for more info...

FRS have been made aware, but so far no fix.

73 de Steve G1XOW