Scalar Wave Detector

Broadband passive scalar field detector with null-coil front end

$110 plan

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// Blueprint rendering available after purchase

Technical Specifications

Classification Scalar EM — Detection

Front End Differentially wound null coil

Common-Mode Rejection >60 dB transverse EM rejection

Sensitivity 1 μV RMS at 1 MHz (typical)

Frequency Range 1 kHz–10 MHz

Display Spectrum + time domain on oscilloscope

Difficulty 2 / 5

Est. Build Cost $150–$350

Est. Build Time 2–4 weeks

Overview

Detecting scalar EM fields requires a front-end that is insensitive to conventional transverse EM (which would swamp any scalar signal) while remaining responsive to scalar potential gradients. This detector uses a differentially wound null coil (two identical coils wound in opposite sense, series-connected) that rejects common-mode transverse fields; any remaining signal is attributed to differential effects including scalar potential gradients. The signal chain includes a low-noise JFET preamp, a selective filter bank (octave-spaced center frequencies from 1 kHz to 10 MHz), lock-in detection using an internal reference oscillator, and a spectrum display. The plan covers the null coil winding procedure, preamp PCB layout, calibration using a known EM source, and protocols for distinguishing genuine scalar signals from stray interference.

Intended Research Use

Passive scalar field mapping, anomalous EM detection, MEG/VTA output characterization, zero-point energy field sensing.

Bill of Materials (15 components)

#Component

01 Ferrite rod, 10mm × 80mm (×4)

02 30 AWG magnet wire, 50m spool (×2)

03 2N5457 JFET (×4, matched pair)

04 1kΩ precision resistors (×10)

05 100 pF NP0 capacitors (×8)

06 Op-amp AD797 (low noise, ×2)

07 Octave filter PCB (custom design in plan)

08 Lock-in amplifier IC (AD630 or equiv.)

09 Oscilloscope, 2ch, 100MHz

10 BNC input connector panel

11 Aluminum shielded enclosure (Hammond 1590)

12 Regulated ±12V supply

13 Precision 10-turn potentiometers (×3)

14 LED signal-level bar graph display

15 PCB fabrication (Gerber files included)

Get Build Plan

Complete plan PDF including all specs, winding geometry, drive circuit schematics, measurement protocols, and Gerber files where applicable.

$110 one-time

Purchase plan — Stripe

Also available: Component kit $380 — members get 10% off

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Complete build documentation (PDF)

Winding specs + circuit schematics

Measurement + verification protocols

Sourcing guide for all BOM items

Lifetime access, no subscription

Build Difficulty

Accessible — good first build for newcomers to scalar EM.

Est. cost: $150–$350
Est. time: 2–4 weeks