Introduction
Scalar electromagnetics attracts a specific kind of researcher — the ones who want to build, measure, and replicate rather than argue theory. If that is you, you are in the right place. This guide covers five scalar energy devices you can build at home, ranging from a weekend project to a multi-month advanced build. All five have published build plans, documented replication records, and a clear measurement methodology.
Whether you are starting from scratch or expanding an existing lab, these five devices give you the broadest coverage of scalar EM phenomena at the lowest entry cost. We will go from easiest to most advanced.
1. Bedini SG Energizer — Best First Build
The Bedini SG (School-Girl) is the canonical entry point into scalar electromagnetics. John Bedini designed it as an accessible demonstration of what he called "radiant energy" capture — a permanent magnet wheel charges a secondary battery while drawing anomalously low current from the primary supply.
What you are actually building is a switched reluctance pulse motor running in a battery-charging configuration. The skill you develop here — precision coil winding, circuit tuning, battery cycling measurement — applies directly to every more advanced device in this list.
Build cost: $120–$280 | Build time: 2–4 weeks | Difficulty: 2/5
The canonical Bedini SG uses a bicycle wheel rotor, ceramic disc magnets on the rim, and a hand-wound bifilar coil on a ferrite core. The drive circuit is a single 2N3055 transistor. That simplicity is the point — it lets you focus on the measurement protocol, not the construction complexity.
What to measure: primary battery voltage and current draw over 4-hour intervals vs. secondary battery charge gained. Run 4 hours, discharge the secondary into a known resistive load, calculate energy in vs. energy out. Document everything. View the Bedini SG build plan →
2. Tesla Bifilar Coil — Wave Mode Exploration
Nikola Tesla patented the bifilar flat pancake coil in 1894 (US Patent 512,340) specifically to maximize self-capacitance and suppress magnetic field generation. The two-conductor parallel winding means adjacent turns carry current in opposite directions — their magnetic fields cancel, leaving only the scalar (potential) component.
This is not a free energy device. It is a research instrument for exploring the scalar wave domain. Tesla used his bifilar configuration in the Colorado Springs experiments (1899–1900) to investigate what he called "non-Hertzian" or longitudinal waves — EM waves that propagate through the medium rather than as transverse radiation.
Build cost: $200–$500 | Build time: 3–5 weeks | Difficulty: 3/5
The coil itself is straightforward — two parallel conductors wound in a flat spiral on an acrylic or bakelite form. The measurement challenge is interesting: use an electrostatic probe or Faraday field mill to characterize the near-field scalar standing wave pattern. The signal source can be a spark gap transmitter or a solid-state Class-E oscillator. View the Tesla Bifilar build plan →
3. Caduceus Coil — The Quickest Build
If you want to hold something in your hands this week, the Caduceus Coil is the answer. Developed by Wilbert Smith in the early 1950s based on Tesla's work, the Caduceus uses two helices wound in opposite directions on a single ferrite core. When driven in phase, the opposing geometries cause magnetic flux cancellation throughout the core — leaving only the scalar potential component as the residual field.
Smith documented anomalous transmission effects — signals propagating through the null-field region of the coil without conventional induction — which he attributed to what he called a "tempic field." The build is accessible to beginners: two spools of magnet wire, a ferrite rod, and a signal generator. Weekend project.
Build cost: $80–$180 | Build time: 1–3 weeks | Difficulty: 2/5
The measurement challenge is real: distinguishing genuine scalar effects from residual stray fields requires a shielded test chamber and careful null-detection methodology. That difficulty is the feature, not a bug — it trains you in the rigorous methodology you will need for every more advanced device. View the Caduceus Coil build plan →
4. Scalar Wave Detector — Your Research Foundation
You cannot study scalar EM phenomena without an instrument capable of detecting them. The Scalar Wave Detector uses a differentially wound null coil — two identical coils wound in opposite sense, series-connected — that rejects common-mode transverse EM fields while remaining responsive to scalar potential gradients.
This detector is the foundation instrument for the entire field. Use it to characterize outputs from the Bedini SG, Sweet VTA, or any device where you suspect anomalous field behavior. It maps scalar field topology around your builds and establishes baseline readings before and after conditioning procedures.
Build cost: $150–$350 | Build time: 2–4 weeks | Difficulty: 2/5
The front-end is the hard part: the null coil requires precise symmetry in winding and placement. The signal chain (JFET preamp → octave-spaced filter bank → lock-in detection) is well-documented in the build plan. Build this early — it will change how you evaluate every other device. View the Scalar Wave Detector build plan →
5. Sweet Vacuum Triode Amplifier — The Advanced Goal
Floyd Sweet's VTA is the highest-claims device in the scalar EM corpus. Sweet reported that a pair of specially conditioned barium ferrite magnets, sandwiched between two coil systems and triggered into self-oscillation, produced output power exceeding input by factors of approximately 1,200:1. The device allegedly ran self-sustained, powering loads from the vacuum coupling with no external input.
No successful public replication exists. The conditioning protocol — exposing the magnets to a precisely calibrated 60 Hz pulsed field combined with mechanical shock — has never been fully documented. What ScalarForge's build plan provides is the most complete documentation of known replication attempts: the conditioning parameters that have been tested, the failure modes that have been documented, and the control variables that replication attempts have identified as most critical.
Build cost: $800–$1,600 | Build time: 8–14 weeks | Difficulty: 5/5
This is not a beginner project. You need oscilloscope experience, ferromagnetic resonance knowledge, and patience. But the documentation is thorough, the failure modes are catalogued, and the measurement protocol is clear. If you want to push the frontier, start here after you have completed the first four builds. View the Sweet VTA build plan →
Getting Started
Start with the Caduceus Coil if you want something this week. Move to the Bedini SG when you are ready to learn pulse-power measurement. Build the Scalar Wave Detector as soon as your budget allows — it changes everything about how you characterize your builds.
ScalarForge members get access to all 26 device build plans, the complete measurement protocol library, and the AI tools you need to document your results properly. Browse the full catalog and join →