Many thanks to SWLing Post contributor, Ivan Cholakov (NO2CW), who shares the following:
Thomas, there has been a lot of discussions regarding Airspy HF+ ever since it came out – heated exchanges regarding comparisons with peers, modifications and firmware updates.
I took my Airspy HF+ and conducted two tests with it:
Airspy HF+ vs. SDRPlay RSP-1A on HF and Medium Wave
Since I could not completely equalize the audio levels, I think it’s good to look at the peak to valley ratios on the display rather than the audio volume.
Airspy HF+ with the R3 mod on and off:
This comparison used SDR #. It may be helpful to run the same comparison on SDR Console V3. I may do that at a later time.
Both tests used W6LVP’s portable amplified receiving loop antenna in a noisy suburban backyard in Florida.
Many thanks, Ivan, for sharing these comparison tests! I agree with you that it’s most helpful to look closely at the peak to valley ratios on the spectrum display rather than using the audio levels as a measure.