ZIAA ARCHIVE RECORDPROTOTYPES
PROT-090prototypeVERIFIED RECORD
Wideband VLF Inductive Loop Receiver for Natural Atmospheric Radio (Revision 3.3)
PROT-090: VLF-RECEIVER-V3CLEARANCE: BLACK-BOXSTATUS: CONTAINED HAZARDYEAR: 2026
Wideband VLF Inductive Loop Receiver for Natural Atmospheric Radio (Revision 3.3)
Discipline: Signal Archaeology · Lead Researcher: Marcus Brody
OPERATIONAL ABSTRACT
A sensitive low-noise magnetic loop receiver tuned to audio-frequency atmospheric radio emissions, capturing lightning whistlers and magnetospheric chorus waves. Enhanced revision 3 with improved low-noise shielding and updated real-time firmware.
TECHNICAL SUMMARY & TRANSDUCTION DYNAMICS
Dual orthogonal 1-meter shielded loop antennas wound with low-capacitance Litz wire feed ultra-low-noise JFET preamplifiers with 110 dB dynamic range. Calibrated for studio and field use under ZIAA experimental protocols. Harmonic distortion measured under 0.02% across primary operating range.
ENGINEERING SPECIFICATIONS
DIMENSIONS
360 × 385 × 175 mm
OPERATIONAL BANDWIDTH
30 Hz – 58 kHz
POWER CONSUMPTION
54 W (PoE+ Gigabit Ethernet)
SIGNAL-TO-NOISE
109 dB (A-Weighted @ 1 kHz)
PRIMARY TRANSDUCER
Dual orthogonal magnetic loop antennas with mu-metal shielding
COMPUTATIONAL CORE / DSP
Custom low-noise analog differential preamplifier with 24-bit ADC digitizer
VECTOR TECHNICAL SCHEMATIC // BLUEPRINT
FIG 5.1 // GEOLOGICAL BOREHOLE STRATA & GEOPHONE TOPOLOGY
FACILITY: VLF-RECEIVER-V3PLAYABLE PROTOTYPE ACOUSTIC EMISSION BENCH
ZIAA ACOUSTIC SYNTHESIS TEST BENCH // V4.1STANDBY
VLF-RECEIVER-V3 // CALIBRATION PROFILE
CH-A TIME-DOMAIN OSCILLOSCOPE (1024-PT)STEREO BINAURAL
CH-B 64-BAND SPECTRAL OCTAVE DECOMPOSITION20 Hz – 20 kHz
CARRIER247.5 Hz
FM RATE13.3 Hz
BINAURAL Δ±2.0 Hz
CUTOFF3660 Hz
RESONANCE Q8.0
CAVITATION23%
WAVE:
FILTER:
35%
BILL OF MATERIALS (BOM) & COMPONENT TOLERANCES
| Component | Supplier | Part No. | Tolerance |
|---|---|---|---|
| Precision Audio Transducer Assembly | ZIAA Precision Machining Shop | ZIAA-TX-139 | ±0.02 mm |
| Ultra-Low-Noise Operational Amplifiers | Texas Instruments / Burr-Brown | OPA1612A-SOIC8 | 0.000015% THD+N |
| Embedded DSP Microcontroller Core | PJRC / STMicroelectronics | STM32H743VIT6 480MHz | Industrial -40C to +85C |
| Conductive Plastic Continuous Potentiometers | Bourns Electronics | 3852A-282-103AL | ±10% Linear |
| Machined Anodized Aluminum Enclosure | ZIAA Mechanical Prototyping Bench | ENC-AL-229 | MIL-A-8625 Type II |
BENCH & FIELD OPERATION NOTES
- High acoustic output capability: monitor SPL levels during resonant feedback experiments.
- Precision optical components: protect lenses from direct dust and moisture during field deployment.