Strange behavior near 114Mhz

[M0GLO]

Give my PSA a look over, it will help I think:

The Filter PSA: Or why is my noise floor bouncing up and own?

Hi everyone! Events at my shack this weekend have reminded me of a very important rule involving SDR receivers, one that doesn’t get talked about much and is frequently overlooked by newbies to the sport: external RF filtering. Specifically receive filtering, TX filtering is a different subject though just as important for the SDR user as these little babies signals aren’t the cleanest out there. We have had some exceptionally good conditions here in the southern UK for the last week, I’ve bee…