I did some further testing with a Kenwood LF-30A Lowpass Filter installed (to remove FM images) and used SAME SETTINGS again on the V1.2 and V1.4 hardware. Here are the results (and 20m is better in both cases):
V1.2 Hardware, LNA-H Port:
V1.4 Hardware, LNA-H Port:
I just see better activity on the V1.2 hardware than I do on the V1.4 hardware.
I do agree with N1JEZ's assessment (and even saw this when HF wasn't developed yet and all there was, was tuning above 30 MHz) that upconverted HF always looked better to the LimeSDR than native HF. Now I realize that some of that is based on the matching networks on the board for receive - they aren't optimized. But the V1.4 boards were supposed to be better for the LNA-L Port, but I've seen confirmed reports from others that the LNA-H Port runs better (and this was even true on V1.2 hardware up to 8 months ago).
Not complaining - just want to know what's going to be done to make this better for those who've bought boards - there is obviously a difference in the hardware and I'm not sure if it's because of the matching networks or gain settings that haven't been realized yet for the HF/SWL tuning range.
Let us know - thanks,
de Marty, KN0CK