I went out to the radio-room at about 0645UT (02 April 2023) or about 2345 PDT and did a half-hour NDB DX session. CX sounded fairly "normal" with greatly lessened QRN compared to a few nights ago, and a few southern BC stations were in the usual strengths. 392 PNA Pinedale, WY was again noted off-air as it has been over the past 2 weeks (bummer!). On a whim, I decided to tune to 60 kHz WWVB to see how it's signal was. Lo and behold, a loud rapid "clacking" greeted me as I was tuning down toward about 103 kHz. A slight dip in the signal at 100 kHz and another peak (slight) at about 97 to 98 kHz. This was at about 0720 UT (02 April) and it MUST be the rejuvinated eLORAN system - very huge signals here and likely the Searchlight, NV Master Station. It sounded quite similar to the former LORAN-C signals from there noted before it's shutdown over a decade ago!
Looks like we are going to (once again) have to build in 100 kHz suppression filters into our audio-band receivers or stouter preselectors for higher LF frequencies, etc.
Kenwood TS440S to an LF-LP filter and 2N3904 NPN preamp to a 15m (65 ft. wire).
Steve McGreevy - N6NKS