Analysis Results

20251214_230935

QTH CM98kq Duration -- SFI 119 K 1 A 8 Geomag VR QUIET
80ef1 80m efhw, 49:1 balun systems unun at 5'; vertical segment to 30' high, continuing 42' due wsw then 60' due now dropping 15'
ryb Rybakov 25ft telescopic whip along back fence

Directional Advantage Analysis

Shows which antenna performs better in each direction. Bar length = dB advantage.

Source:

Azimuthal Map

Source:
Band:

RX Performance by Band

TX Reach by Band

DX Reach by Band

Performance by Direction (Table)

Experiment Timeline

Full Text Report ▼ 

============================================================
COMPARISON BY BAND (Priority 1)
============================================================

20m:
  Common stations: 53
    80ef1: avg SNR -6.0 dB (baseline)
    ryb: avg SNR -6.0 dB +0.0 dB
  Distance (all stations with grids):
    80ef1: avg 3439 km, max 10347 km (94 stns) (baseline)
    ryb: avg 3495 km, max 17769 km (80 stns) +56 km

15m:
  Common stations: 38
    80ef1: avg SNR -3.5 dB (baseline)
    ryb: avg SNR -7.3 dB -3.8 dB
  Distance (all stations with grids):
    80ef1: avg 6710 km, max 13439 km (49 stns) (baseline)
    ryb: avg 5844 km, max 13439 km (57 stns) -866 km

10m:
  Common stations: 12
    80ef1: avg SNR -3.8 dB (baseline)
    ryb: avg SNR -7.2 dB -3.4 dB
  Distance (all stations with grids):
    80ef1: avg 8578 km, max 12842 km (19 stns) (baseline)
    ryb: avg 7296 km, max 10696 km (23 stns) -1282 km

============================================================
COMPARISON BY BEARING + BAND (Priority 2)
============================================================

20m:
  N:
      80ef1: 24 stns, avg -10.8 dB, avg 5252 km, max 5416 km (baseline) *
      ryb: 12 stns, avg -6.7 dB, avg 5089 km, max 5416 km +4.1 dB
  NE:
      80ef1: 8 stns, avg -7.2 dB, avg 3212 km, max 3981 km (baseline) *
      ryb: 7 stns, avg -11.2 dB, avg 3089 km, max 3981 km -4.1 dB
  E:
      80ef1: 44 stns, avg -6.5 dB, avg 2760 km, max 3912 km (baseline) *
      ryb: 41 stns, avg -4.2 dB, avg 2738 km, max 3912 km +2.3 dB
  SE:
      80ef1: 14 stns, avg -1.3 dB, avg 3047 km, max 10347 km (baseline)
      ryb: 16 stns, avg -8.8 dB, avg 3726 km, max 10347 km -7.5 dB *
  S:
      80ef1: 2 stns, avg -7.1 dB, avg 132 km, max 132 km (baseline)
      ryb: 2 stns, avg -9.7 dB, avg 8951 km, max 17769 km -2.6 dB
  W:
      80ef1: 1 stns, avg -9.7 dB, avg 3978 km, max 3978 km (baseline)
      ryb: 1 stns, avg -9.0 dB, avg 3978 km, max 3978 km +0.7 dB
  NW:
      80ef1: 1 stns, avg -15.0 dB, avg 3125 km, max 3125 km (baseline)
      ryb: 1 stns, avg -16.5 dB, avg 3125 km, max 3125 km -1.5 dB

15m:
  N:
      80ef1: 14 stns, avg -6.2 dB, avg 5819 km, max 11068 km (baseline)
      ryb: 19 stns, avg -8.9 dB, avg 5223 km, max 5416 km -2.8 dB *
  NE:
      80ef1: 1 stns, avg 3.7 dB, avg 2000 km, max 2000 km (baseline)
      ryb: 1 stns, avg -9.4 dB, avg 2000 km, max 2000 km -13.1 dB
  E:
      80ef1: 9 stns, avg -2.1 dB, avg 2491 km, max 2892 km (baseline)
      ryb: 15 stns, avg -4.9 dB, avg 2381 km, max 3098 km -2.8 dB *
  SE:
      80ef1: 8 stns, avg -5.1 dB, avg 8186 km, max 10807 km (baseline) *
      ryb: 3 stns, avg -10.2 dB, avg 10088 km, max 10432 km -5.1 dB
  SW:
      80ef1: 2 stns, avg -9.5 dB, avg 12786 km, max 12786 km (baseline)
      ryb: 2 stns, avg -6.2 dB, avg 12786 km, max 12786 km +3.2 dB
  W:
      80ef1: 3 stns, avg -9.6 dB, avg 10215 km, max 13439 km (baseline)
      ryb: 3 stns, avg -5.3 dB, avg 7109 km, max 13439 km +4.3 dB
  NW:
      80ef1: 12 stns, avg -5.8 dB, avg 8431 km, max 9153 km (baseline)
      ryb: 14 stns, avg -3.8 dB, avg 8498 km, max 9068 km +2.0 dB *

10m:
  N:
      80ef1: 2 stns, avg -0.5 dB, avg 5416 km, max 5416 km (baseline)
      ryb: 3 stns, avg -8.7 dB, avg 5416 km, max 5416 km -8.2 dB *
  E:
      80ef1: 0 stns
      ryb: 1 stns, avg -5.6 dB, avg 2451 km, max 2451 km -5.6 dB *
  SE:
      80ef1: 8 stns, avg -8.3 dB, avg 8909 km, max 10573 km (baseline)
      ryb: 9 stns, avg -10.0 dB, avg 7021 km, max 10344 km -1.7 dB *
  SW:
      80ef1: 1 stns, avg -2.7 dB, avg 12842 km, max 12842 km (baseline)
      ryb: 1 stns, avg -18.0 dB, avg 10696 km, max 10696 km -15.3 dB
  NW:
      80ef1: 8 stns, avg 0.3 dB, avg 8505 km, max 8939 km (baseline)
      ryb: 9 stns, avg -4.6 dB, avg 8358 km, max 8939 km -4.9 dB *

============================================================
TX ANALYSIS (PSKReporter - who heard you)
============================================================

Found 525 TX spots

----------------------------------------
TX BY BAND
----------------------------------------

20m:
    80ef1: reach 108 stns (baseline) | avg -16.6 dB, range [-25 to +3]
    ryb: reach 183 stns +75 | avg -13.5 dB, range [-25 to +14]
  Distance (all receivers with grids):
    80ef1: avg 3018 km, max 14942 km (108 stns) (baseline)
    ryb: avg 3440 km, max 12779 km (183 stns) +422 km

15m:
    80ef1: reach 112 stns (baseline) | avg -9.6 dB, range [-25 to +29]
    ryb: reach 42 stns -70 | avg -13.2 dB, range [-21 to +4]
  Distance (all receivers with grids):
    80ef1: avg 4381 km, max 14860 km (112 stns) (baseline)
    ryb: avg 4129 km, max 12073 km (42 stns) -252 km

10m:
    80ef1: reach 65 stns (baseline) | avg -12.4 dB, range [-25 to +14]
    ryb: reach 15 stns -50 | avg -11.7 dB, range [-25 to +0]
  Distance (all receivers with grids):
    80ef1: avg 7687 km, max 13136 km (65 stns) (baseline)
    ryb: avg 7837 km, max 10375 km (15 stns) +151 km

----------------------------------------
TX BY BEARING + BAND
----------------------------------------

20m:
  N:
      80ef1: 7 stns, avg -9.6 dB, avg 1126 km, max 1507 km (baseline) *
      ryb: 6 stns, avg -4.7 dB, avg 2542 km, max 8225 km +4.9 dB
  NE:
      80ef1: 12 stns, avg -19.7 dB, avg 3161 km, max 4244 km (baseline)
      ryb: 23 stns, avg -13.5 dB, avg 3195 km, max 4473 km +6.1 dB *
  E:
      80ef1: 73 stns, avg -16.5 dB, avg 3003 km, max 6636 km (baseline)
      ryb: 144 stns, avg -13.7 dB, avg 3359 km, max 9639 km +2.9 dB *
  SE:
      80ef1: 7 stns, avg -20.3 dB, avg 5309 km, max 9717 km (baseline) *
      ryb: 4 stns, avg -19.0 dB, avg 5392 km, max 10385 km +1.3 dB
  S:
      80ef1: 2 stns, avg -16.0 dB, avg 366 km, max 494 km (baseline) *
      ryb: 1 stns, avg -12.0 dB, avg 175 km, max 175 km +4.0 dB
  SW:
      80ef1: 2 stns, avg -18.0 dB, avg 152 km, max 166 km (baseline)
      ryb: 2 stns, avg -19.0 dB, avg 6449 km, max 12779 km -1.0 dB
  W:
      80ef1: 3 stns, avg -18.7 dB, avg 6344 km, max 14942 km (baseline) *
      ryb: 1 stns, avg -15.0 dB, avg 152 km, max 152 km +3.7 dB
  NW:
      80ef1: 2 stns, avg -8.5 dB, avg 1835 km, max 3178 km (baseline)
      ryb: 2 stns, avg -16.0 dB, avg 11120 km, max 11120 km -7.5 dB

15m:
  N:
      80ef1: 4 stns, avg -16.2 dB, avg 1671 km, max 1913 km (baseline) *
      ryb: 1 stns, avg -19.0 dB, avg 1043 km, max 1043 km -2.8 dB
  NE:
      80ef1: 16 stns, avg -8.4 dB, avg 2777 km, max 4181 km (baseline) *
      ryb: 2 stns, avg -4.0 dB, avg 2577 km, max 2765 km +4.4 dB
  E:
      80ef1: 49 stns, avg -7.5 dB, avg 2596 km, max 4194 km (baseline) *
      ryb: 25 stns, avg -12.7 dB, avg 2689 km, max 4387 km -5.3 dB
  SE:
      80ef1: 9 stns, avg -11.2 dB, avg 7331 km, max 14860 km (baseline) *
      ryb: 4 stns, avg -14.2 dB, avg 7491 km, max 10439 km -3.0 dB
  SW:
      80ef1: 5 stns, avg -12.4 dB, avg 6028 km, max 13090 km (baseline) *
      ryb: 2 stns, avg -17.5 dB, avg 6127 km, max 12073 km -5.1 dB
  W:
      80ef1: 4 stns, avg -11.5 dB, avg 2067 km, max 4005 km (baseline) *
      ryb: 1 stns, avg -13.0 dB, avg 125 km, max 125 km -1.5 dB
  NW:
      80ef1: 25 stns, avg -11.8 dB, avg 8318 km, max 14034 km (baseline) *
      ryb: 7 stns, avg -15.1 dB, avg 8235 km, max 8609 km -3.3 dB

10m:
  N:
      80ef1: 2 stns, avg -8.5 dB, avg 663 km, max 1305 km (baseline) *
      ryb: 0 stns
  E:
      80ef1: 6 stns, avg -10.0 dB, avg 2486 km, max 3099 km (baseline) *
      ryb: 1 stns, avg -3.0 dB, avg 3100 km, max 3100 km +7.0 dB
  SE:
      80ef1: 8 stns, avg -12.8 dB, avg 10264 km, max 11238 km (baseline) *
      ryb: 3 stns, avg -15.0 dB, avg 7663 km, max 10375 km -2.2 dB
  SW:
      80ef1: 15 stns, avg -13.4 dB, avg 8101 km, max 13136 km (baseline) *
      ryb: 0 stns
  NW:
      80ef1: 34 stns, avg -12.6 dB, avg 8228 km, max 9864 km (baseline) *
      ryb: 11 stns, avg -11.5 dB, avg 8315 km, max 8677 km +1.0 dB

============================================================
SUMMARY
============================================================

Baseline antenna: 80ef1

20m:
  ryb vs 80ef1: RX: similar | TX reach: ryb +75 stns (183 vs 108)
15m:
  ryb vs 80ef1: RX: 80ef1 3.8dB better | TX reach: 80ef1 +70 stns (112 vs 42)
10m:
  ryb vs 80ef1: RX: 80ef1 3.4dB better | TX reach: 80ef1 +50 stns (65 vs 15)

----------------------------------------
RECOMMENDATION:
  80ef1: 2 RX wins, 2 TX wins
  ryb: 0 RX wins, 1 TX wins

  --> 80ef1 appears to be the better overall performer

Methodology ▼

Data Sources

  • RX (Receive) Data: Parsed from WSJT-X ALL.TXT log file, which records all decoded FT8 signals with timestamps, frequencies, and signal-to-noise ratios (SNR in dB).
  • TX (Transmit) Data: Retrieved from PSKReporter.info API, which aggregates reception reports from stations worldwide that heard your transmissions.
  • Solar Data: Solar Flux Index (SFI), K-index, and A-index from hamqsl.com at session start.

RX Analysis

  • Common Stations: Only stations heard by ALL antennas in a band are compared (apples-to-apples). This eliminates bias from propagation changes.
  • Average SNR: Mean signal-to-noise ratio across all common stations. Higher is better.
  • Baseline: First antenna in the comparison. Other antennas show delta (difference) from baseline.
  • Winner: Antenna with higher average SNR. Differences <1 dB are considered ties (within measurement uncertainty).

TX Analysis

  • Reach: Number of unique stations that received your signal during each antenna interval.
  • Average Report: Mean SNR of reception reports from PSKReporter.
  • Common Receivers: Where possible, only receivers that heard both antennas are compared. When few common receivers exist, reach count is used instead.
  • PSKReporter Limitation: Data is only available for the last 24 hours and depends on receiving stations uploading to PSKReporter.

Distance Analysis

  • Average Distance: Mean great-circle distance to stations heard (RX) or that heard you (TX). Higher average = better DX performance.
  • Max Distance: Farthest station reached. Indicates antenna's long-haul capability.
  • Calculation: Haversine formula using station grid squares. Only stations with known grids are included.
  • Units: Distances shown in kilometers (km). 1 km ≈ 0.62 miles.

Direction Analysis

  • Bearing Calculation: Great-circle bearing from your grid square to each station's grid.
  • Direction Bins: 8 compass directions (N, NE, E, SE, S, SW, W, NW) in 45° sectors.
  • Per-Direction Winner: Antenna with better average SNR for stations in that direction. Helps identify directional patterns in antenna performance.

Recommendations

  • Win Counting: Each band and direction comparison contributes RX and TX "wins" to each antenna.
  • Overall Winner: Antenna with more combined wins across all bands.
  • Caveats: Results depend on propagation conditions during the test. For robust conclusions, repeat tests across multiple days and conditions.

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