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Chameleon Knowledge Base · The Complete Online HF Antenna Handbook

Rybakov Engineering Evidence Centre

Evidence-centre purpose: Allow a technically competent reader to reconstruct the model, understand every assumption and distinguish simulation, field reference and manufacturer-guide evidence.

Accepted Solver Foundation

The project’s native macOS NEC-4.2 baseline has passed its controlled validation and rollback requirements. Licensed NEC-4 source, solver binaries, protected examples and private installation information are never part of the public package.

Current Rybakov Studies

Study Purpose Available evidence Status
R000 First SS25 impedance sweep Safe model, manifest, raw output, CSV and JSON Exploratory
R001A/B 16.5 ft versus 33 ft radial-length sensitivity Safe models, manifests, raw output, CSV and JSON Exploratory sensitivity—not Bob replication
R002 Nine-band full-SS25 elevation/azimuth patterns Safe model, manifest, raw patterns, CSV, JSON and SVG graphics Controlled exploratory simulation
R003A–D MPAS guide SS25/SS17 geometries and one counterpoise Safe models, raw patterns, evidence-anchored JSON and SVG graphics Controlled exploratory simulation

NEC Engineering Evidence Gallery

The following figures are controlled NEC-4 education graphics, not measured far-field product specifications. The two overview figures establish the band progression; the representative 40 m, 20 m and 10 m pairs show how the classic full-SS25 and MPAS guide geometries differ.

Modeled principal-lobe elevation by band for classic full SS25 and adjusted MPAS geometries
Modeled principal-lobe elevation comparison, 80–6 m.
Documented field-reference and MPAS guide SWR profiles by band
Evidence-anchored SWR starting profiles; not a controlled head-to-head product test.
Classic SS25 modeled 40 metre elevation pattern
40 m · Classic full-SS25 geometry.
MPAS guide geometry modeled 40 metre elevation pattern
40 m · MPAS guide geometry.
Classic SS25 modeled 20 metre elevation pattern
20 m · Classic full-SS25 geometry.
MPAS guide geometry modeled 20 metre elevation pattern
20 m · MPAS guide geometry.
Classic SS25 modeled 10 metre elevation pattern
10 m · Classic full-SS25 geometry.
MPAS guide geometry modeled 10 metre elevation pattern
10 m · MPAS guide geometry.

Open the complete nine-band NEC Pattern Laboratory.

Download Inventory

  • NEC geometry inputs: `04_MODELS/CHA_RYBAKOV/`
  • Run manifests and raw outputs: controlled `06_RAW_RESULTS/RYB-*` records
  • Processed impedance and pattern data: `07_PROCESSED_RESULTS/RYB-*`
  • Pattern graphics and manifest: `14_RELEASES/RYBAKOV_CKB_PACKAGE/assets/`
  • Engineering reports: `13_DOCUMENTATION/CHA_RYBAKOV_*`
  • Validation matrix: `11_TEST_DATA/CHA_RYBAKOV_VALIDATION_MATRIX.md`

These local paths will become approved public download links only after release-payload scanning and publication approval.

Every Figure Must Declare

  • configuration ID and revision;
  • frequency and units;
  • radiator and return-system geometry;
  • feed architecture and tuner state;
  • ground, feedpoint height and reference plane;
  • normalization and plotted quantity;
  • evidence type, run ID and principal limitation.

Outstanding Measurement Programme

  • 4:1, HYBRID-MINI and HYBRID-MICRO two-port/load-dependent loss and thermal behaviour.
  • URT1 tuning range, matched loss, memory repeatability and common-mode behaviour.
  • M-COIL and M25-COIL inductance, Q, loss, tuning sensitivity, bandwidth and temperature in their specified SS17 and SS25 branches.
  • Coax/choke characterization and feed-line-current mapping.
  • Return-system comparisons for MPAS wire, Counterpoise Kit, DIY, FSR and Stinger.
  • Three-deployment repeatability, bounded ground and alternating field-strength tests.

Correction Policy

Accepted results are not silently overwritten. A correction creates a new revision, identifies what changed and why, preserves the earlier record and states which customer guidance is affected.

Status: Evidence architecture complete; public downloads remain gated pending technical validation, rights review and Carl’s approval.

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