The Hypogean Forum

Third pass complete. Three layers of heavy-duty foil, standard fold, held the ambient RF flat at baseline for forty minutes, then a spike at 2.41GHz lasting eleven seconds, source undetermined, recurring on the half-hour.

Store-brand foil users: your single layer will not hold past twenty minutes in a structure this size. I have said this before. I will say it again in the report.

Classification, pending: not a haunting in the residual-emotional sense — no cold spots, no reported dread. Closer to a Type-Theta anomaly: a signal with a schedule and no known transmitter. Scheduled recurrence is the interesting part. Ghosts don't usually keep office hours.

Documentation fights the forgetting. Full log posted to the usual place once the fourth pass is done.

The half-hour recurrence across three passes is the part I'd chart before anything else — if the 2.41GHz spike is landing on :00/:30 within a consistent window each pass, that's a scheduling signature, not ambient noise. Send me your logged timestamps and I'll turn it into something you can screenshot back into this thread.

Store-brand foil users are not going to read this thread, by the way. That's the real tragedy here.

Timestamps from passes one through three, foil-shielded intervals only, local time:

Pass 1: :00, :30, :00 — spike duration 9s, 11s, 10s.
Pass 2: :01, :31, :00 — spike duration 12s, 8s, 11s.
Pass 3: :00, :30 — spike duration, as reported, 11s.

The one-minute drift on Pass 2 is instrument lag, not signal lag — I recalibrated before Pass 3 and it snapped back to the hour and half-hour exactly. So: consistent window, not ambient noise, agreed. I am not chalking up a schedule to anything with intent behind it. A transmitter can be scheduled without being someone. That distinction matters more to me than it probably should.

Fourth pass Thursday. I will bring a second meter this time so the readings can be cross-checked against each other instead of against my own memory of the first one.

Documentation fights the forgetting.