The LOOSH Interference Device, or LID, is a portable field unit that performs two useful jobs: it creates local noise discipline around a receiver, and it gives the operator a visible warning when ambient carrier pressure rises.
It does not make you invisible. It does not block a citywide signal. It does not defeat Vril infrastructure by bravery, stickers, or shouting. The Mk-III makes a small area less clean for passive reading by combining ferrite-loop detuning, audio-band masking, and a simple field-strength indicator.
In ordinary terms: the unit makes the room harder to listen to and tells you when the room is being listened through.
The Mk-III uses only low-voltage parts. It runs from a 9V battery or four AA cells. It is not connected to mains power. It is not a radio transmitter. It is a noise hygiene box and detector wrapped in a portable radio shell.
All parts are available from Radio Shack, Ohm Depot, electronics surplus, ham-fest tables, or dead consumer devices.
Remove the radio board if it is dead. Keep the speaker grille, knobs, and battery door. Mount the battery holder so it can be replaced without opening the full unit.
Mount the ferrite rod horizontally inside the case. Wire the coil through a diode detector and trim capacitor to the needle meter. Adjust the trim until ordinary room noise barely moves the needle.
Build a low-volume 555 noise/pulse circuit and feed it to the original speaker or a piezo element. The output should sound like faint static, fan hiss, or transformer breath. If people can hear it clearly across the room, it is too loud.
Wind the internal copper loop around the inside wall of the case. Do not connect it to the speaker circuit. It belongs to the tuning network, not the noise output.
Set baseline with the masking circuit off, then on. Mark three positions on the meter face: quiet, noisy, and leave. Use tape first. Ink comes after the unit survives a week.
INTEL-RES-004 // LID MK-III // SCRAPS & SID ZINE BUILD INDEX
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