[Elecraft] P3 Artifacts

[Jim]

Any guidance on the artifacts I am seeing with the P3?

I have the problem that has been discussed in detail.  When I tune to certain frequencies, I will get a "blip" on the screen that is 5-6 dB above the noise and I have the classic artifact that is ~3 kHz wide and 4-5 dB above the noise floor, that is just below the tuned frequency.  I have the ribbon cable dressed to the LHS of the chassis and the coax on the RHS (when looking at the P3 display).

I have tried 31 material chokes on the coax with no apparent change.

Did I miss a solution that was published before?

If so, I am sorry for the use of the bandwidth.  If someone could direct me to the specific post, I would appreciate it.

Tnx

Jim
WA9ZBV