On 16/11/2022 05:26, Paul - AI7JR wrote:

Here are scans off my QDX. I think the 40, 30, and 20m scans are plausible.

Paul

Looking at the dB scale 80m does not look bad, others have posted similar.

60m was not at first included in the QDX spec.
It was only added when it was pointed out that it worked and the harmonic suppression was adequate.
It uses the 40m BPF and LPF.

I always reckon to try before modifying. At 60m 15dB attenuation may be acceptable. Does noise level increase when a tuned? antenna is connected? Does it receive well? If it really worries you then adjustment of the BPF will make 40m look worse.

73 Alan G4ZFQ