HJ4AAM — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving HJ4AAM, decoded by SO8OO in southeastern Poland. 9 FT8 messages attributed to this token as transmitter, on 40m, across 2 UTC dates in the available aggregate history. Observed between 2026-09-08 and 2026-09-13.
These are automated observations at the SO8OO receiver, not an official contact log. Times are UTC. Attribution follows decoded FT8 message structure: CQ uses the first token and directed-looking messages use the second. Free text that resembles a directed message can be attributed imperfectly. Summary S/N reflects propagation plus SO8OO receiver, antenna and local-noise conditions. Counts are not adjusted for monitoring outages; transmissions that were not decoded are absent. Inferred entity and location data may be inaccurate for portable, remote or special-event operation.
SO8OO decoded 9 FT8 messages attributed to HJ4AAM as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (100%). In this small sample, the estimated median decoder S/N was -22 dB; no usual signal pattern is inferred.
Overview
Observed FT8 message patterns
- Attributed sample
- 9 messages
- Active dates
- 2 UTC dates
- Estimated median S/N
- -22 dB
- S/N percentile sample
- Too small
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 9, moderate (-15 to -9 dB) 0, strong (≥ -8 dB) 0.
WSJT-X defines S/N reports against a 2,500 Hz reference noise bandwidth. The ranges above are SO8OO receiver-side display categories, not official WSJT-X classes, transmitter-power measurements or estimates of how easy the station is to hear elsewhere. Statistics include only successful decodes on SO8OO's monitored FT8 channels; transmissions that were not decoded are absent. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).
Frequent counterpart tokens observed at SO8OO
Tokens most often paired with HJ4AAM in decoded directed-looking exchanges:
Attributed messages by UTC hour
Rolling 90-day UTC chart window. Counts follow decoded message structure: the first token for CQ, or the second token in a directed-looking message.
Most frequent locator attributed to HJ4AAM
The map compares the centres and boundaries of the locator field attributed to this token by decoded message structure, 2° × 1° as a Maidenhead square, and SO8OO's six-character receiver square. The separation is not an exact antenna-to-antenna distance or a radio-path length.
- Attributed locator
- FJ26 · 2 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 9,937 km (approx.)
- Last such locator decoded
- 2026-09-13 02:18 UTC
A decoded locator can describe portable, remote or special-event operation and is not proof of a permanent station address or transmitter identity.
Observed FT8 exchanges
S/N cells show: decoded at SO8OO / report transmitted by the counterpart. An observed exchange is not a QSL or an official logbook confirmation.
| Time UTC | Band | HJ4AAM S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-17 06:11 | 40m | - / -12 | DK7ZT | -8 / - | 2 | Partial capture |
| 09-17 06:02 | 40m | - / -19 | G0BLB | -8 / - | 3 | ✓ Closing fragment |
| 09-17 05:46 | 40m | - / - | PD1AC | -7 / - | 3 | Partial capture |
| 09-17 05:42 | 40m | - / - | F4MTU | -8 / - | 3 | Partial capture |
| 09-17 05:35 | 40m | - / -16 | IK5PWQ | +11 / - | 8 | ✓ Closing fragment |
| 09-13 02:47 | 40m | - / -9 | NP4EB | -12 / - | 2 | Partial capture |
| 09-13 02:18 | 40m | -24 / -17 | 4L1FL | +2 / - | 5 | Partial capture |
| 09-13 01:55 | 40m | - / -24 | RY7F | +3 / - | 9 | Partial capture |
| 09-13 01:54 | 40m | - / -10 | NF3R | -22 / - | 2 | ✓ Closing fragment |
| 09-13 01:50 | 40m | - / -22 | RA6ABC | -8 / - | 2 | ✓ Closing fragment |
| 09-13 01:16 | 40m | - / -16 | R5DT | -4 / - | 2 | ✓ Closing fragment |
| 09-13 01:12 | 40m | -23 / - | KN6RO | -16 / -18 | 2 | ✓ Closing observed |
| 09-13 01:05 | 40m | - / -10 | EA7R | -4 / - | 3 | ✓ Closing fragment |
| 09-08 02:22 | 40m | - / - | EA3EDU | +9 / - | 9 | Partial capture |
| 09-08 01:51 | 40m | - / -10 | KY2J | -14 / - | 4 | Partial capture |
| 09-08 01:26 | 40m | -22 / 0 | W4PSK | -6 / - | 3 | ✓ Closing observed |
| 09-08 00:53 | 40m | -21 / - | N1WI | - / -26 | 4 | Partial capture |
| 09-08 00:22 | 40m | - / -15 | K4DBC | -17 / - | 5 | Partial capture |
| 09-08 00:17 | 40m | - / -18 | IK2XDE | -20 / - | 4 | Partial capture |
| 09-07 23:35 | 40m | - / -17 | YB5QZ | -10 / - | 4 | ✓ Closing fragment |
| 09-07 23:32 | 40m | - / -7 | PV8AJ | -11 / - | 2 | ✓ Closing fragment |
| 09-07 23:30 | 40m | - / -17 | K2UO | -11 / - | 2 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 053745 +12 700 HJ4AAM IK5PWQ JN53 (x4) 054215 -8 1837 HJ4AAM F4MTU IN88 (x3) 054615 -6 785 HJ4AAM PD1AC JO22 (x3) 060200 -6 2167 HJ4AAM G0BLB -19 (x3) 061100 -10 1906 HJ4AAM DK7ZT -12 (x2)
Decoder S/N history by band
Count-weighted daily averages across messages attributed to this profiled token and successfully decoded at SO8OO, limited to the rolling 90-day UTC chart window.
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