Getting birdies around 820 kHz BCAM on my 6300

Gents,

I'm getting several irregularly spaced birdies in the 820 kHz area of the broadcast AM band on my Flex 6300, which do not appear when I'm using my SDRPlay RSP2.

https://drive.google.com/file/d/1X0yjP0ySOF51DLetmoJK7UfX5rV83vwT/view?usp=sharing

https://drive.google.com/file/d/1qp6WV_nGyKDQY9KyKPwh3UNYQOXTfacc/view?usp=sharing

Please see the attached pics.  As you can see, the birdies in SSDR aren't dead-steady (as a carrier would be) but rather wander very slightly.  The first pic was taken from inside SSDR with no antenna connected - in fact, the only cables connected to the 6300 are the power cord (heavily choked with a thoroughly wrapped FT240-31 toroid) and the CAT5e cable between the computer and 6300.  The second pic was taken from inside SDR-Console using an RSP2 tuned to the same band segment, also with no antenna connected. NOTE: There is a strong local broadcast AM station at 820 kHz that is picked up very faintly by both radios even with no antennae connected, so disregard that signal in both pics.

Is anyone else seeing anything like this on your Flex in the broadcast AM band segment (or anywhere else, for that matter) when no antenna is connected?

Thanks in advance,

Mark  K1LSB

EDIT:  Here's a pic with the antenna connected.  The birdies are still there, in the same strength as when no antenna was connected.

https://drive.google.com/file/d/1vtnZqJXqXuZ-GQQzs3jLLQiMfUCyHqXh/view?usp=sharing