HA7JDU — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving HA7JDU, decoded by SO8OO in southeastern Poland. 1,030 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, across 38 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-10-14.
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 1,030 FT8 messages attributed to HA7JDU as the transmitting token by decoded message structure across 38 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (56%), followed by 80 m (40%) and 20 m (4%). Most decodes (56%) fell within the six-hour window 22:00-04:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (76%); the estimated median was +3.4 dB.
Overview
Bands
Last attributed message: 2026-10-14 19:46 UTC
Observed FT8 message patterns
- Attributed sample
- 1,030 messages
- Active dates
- 38 UTC dates
- Estimated median S/N
- +3.4 dB
- Estimated 10th-90th percentile
- -20 to +14.1 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 179, moderate (-15 to -9 dB) 64, strong (≥ -8 dB) 787.
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.
Frequent counterpart tokens observed at SO8OO
Tokens most often paired with HA7JDU 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 HA7JDU
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
- JN87 · 538 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 444 km (approx.)
- Last such locator decoded
- 2026-10-14 19:46 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 | HA7JDU S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-14 19:46 | 40m | -22 / -8 | JY5IB | -13 / - | 3 | Partial capture |
| 10-14 17:58 | 40m | -17 / -10 | YO4LUP | -11 / +1 | 6 | ✓ Full exchange observed |
| 10-14 17:57 | 40m | -19 / - | M0MLS | - / -1 | 2 | ✓ Closing fragment |
| 10-14 08:32 | 40m | -14 / - | DF7NO | -21 / - | 3 | ✓ Full exchange observed |
| 10-14 08:32 | 40m | -14 / - | S55A | - / +1 | 2 | ✓ Closing fragment |
| 10-14 08:31 | 40m | -14 / +7 | HA6WT | -17 / +9 | 5 | ✓ Full exchange observed |
| 10-14 06:56 | 40m | -14 / +3 | YO3GNF | -15 / +4 | 5 | ✓ Full exchange observed |
| 10-14 05:28 | 40m | -20 / - | ON5HE | -6 / - | 4 | ✓ Closing observed |
| 10-14 05:21 | 40m | - / - | E75FM | -9 / - | 3 | Partial capture |
| 10-09 23:01 | 80m | +15 / - | SP4WJ | -6 / -13 | 3 | ✓ Closing observed |
| 10-09 22:59 | 80m | +10 / +1 | M9KER | -18 / -16 | 4 | ✓ Full exchange observed |
| 10-09 22:59 | 80m | - / - | UA3ATQ | -15 / - | 9 | Partial capture |
| 10-09 22:56 | 80m | +14 / - | EC5M | - / - | 2 | Partial capture |
| 10-09 22:54 | 80m | +14 / - | EA3AZ | - / - | 2 | Partial capture |
| 10-09 22:52 | 80m | +11 / -4 | M7CWF | -10 / -3 | 5 | ✓ Full exchange observed |
| 10-09 22:50 | 80m | +8 / +6 | G8OCV | -1 / - | 4 | Partial capture |
| 10-09 22:45 | 80m | +12 / - | EA7Z | - / -17 | 6 | ✓ Closing fragment |
| 10-09 18:45 | 40m | -20 / +7 | DL8TV | +3 / - | 6 | ✓ Full exchange observed |
| 10-09 18:36 | 40m | -10 / - | JH6PFY | - / - | 2 | Partial capture |
| 10-09 16:56 | 40m | -16 / - | DA0M | - / -15 | 2 | ✓ Closing fragment |
| 10-09 16:48 | 40m | -13 / - | JA0IXW | -20 / -9 | 5 | ✓ Closing observed |
| 10-09 16:46 | 40m | -12 / - | JA3MHV | -13 / -15 | 5 | ✓ Closing observed |
| 10-09 05:14 | 40m | - / - | HB9IRO | -7 / - | 2 | Partial capture |
| 10-08 18:58 | 40m | - / -2 | EA5IYD | -9 / - | 2 | ✓ Closing fragment |
| 10-08 18:37 | 40m | - / +2 | F5LVR | -13 / - | 2 | Partial capture |
| 10-08 16:57 | 40m | -2 / - | G7BTP | - / -17 | 2 | ✓ Closing fragment |
| 10-08 16:55 | 40m | -4 / - | PH7KLM | - / -5 | 2 | ✓ Closing fragment |
| 10-08 16:54 | 40m | -2 / - | DM3BN | 0 / -13 | 3 | Partial capture |
| 10-08 16:52 | 40m | -6 / - | HF1Z | - / - | 2 | Partial capture |
| 10-08 16:43 | 40m | -17 / - | DK9RC | - / -7 | 2 | ✓ Closing fragment |
| 10-08 16:42 | 40m | -19 / - | A93MO | - / -13 | 3 | ✓ Closing fragment |
| 10-08 16:30 | 40m | -14 / - | DK6WS | -15 / -14 | 3 | Partial capture |
| 10-04 07:08 | 40m | -2 / +1 | GJ0KYZ | -12 / -14 | 4 | ✓ Full exchange observed |
| 10-04 07:07 | 40m | - / -11 | F8VNU | -21 / - | 2 | Partial capture |
| 10-04 05:59 | 40m | -12 / - | HI3LER | - / -24 | 6 | ✓ Closing fragment |
| 10-04 05:58 | 40m | -16 / - | R3ICU | -18 / - | 2 | ✓ Closing observed |
| 10-04 05:04 | 40m | - / - | DL3NAA | +4 / - | 2 | Partial capture |
| 10-04 03:20 | 40m | - / -15 | UA3VFL | -24 / - | 2 | ✓ Closing fragment |
| 10-04 03:19 | 40m | - / -11 | N4DWD | -16 / - | 2 | ✓ Closing fragment |
| 10-02 01:01 | 40m | -21 / -1 | F4CQS | -10 / - | 3 | ✓ Closing observed |
| 10-02 00:57 | 40m | -22 / - | K9DRO | - / -11 | 2 | ✓ Closing fragment |
| 10-02 00:56 | 40m | -20 / - | N8NVI | - / - | 2 | Partial capture |
| 10-02 00:54 | 40m | -22 / - | NX1K | - / -13 | 3 | Partial capture |
| 10-02 00:52 | 40m | -19 / - | KE8ZXF | - / -14 | 3 | ✓ Closing fragment |
| 10-02 00:49 | 40m | -22 / - | HK4QXX | -19 / -13 | 3 | ✓ Closing observed |
| 10-02 00:47 | 40m | -20 / - | KW4BY | - / - | 2 | Partial capture |
| 10-02 00:37 | 40m | -20 / - | KK4JO | -8 / - | 2 | ✓ Closing observed |
| 10-02 00:31 | 40m | - / +6 | PD1HBL | -12 / - | 3 | ✓ Closing fragment |
| 10-02 00:31 | 40m | - / -3 | UA9YFL | -14 / - | 2 | Partial capture |
| 10-01 18:07 | 40m | -18 / -7 | JA4FKX | -2 / - | 3 | ✓ Closing observed |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 083330 -14 1498 DF7NO HA7JDU R+16 (x2) 083430 -16 1498 SQ1EG HA7JDU +13 175730 -19 1693 M0MLS HA7JDU R-01 (x2) 175815 -14 1088 HA7JDU YO4LUP KN43 (x2) 175900 -17 1693 YO4LUP HA7JDU +01 175915 -8 1088 HA7JDU YO4LUP R-10 175930 -17 1692 YO4LUP HA7JDU RR73 175945 -11 1088 HA7JDU YO4LUP 73 184000 -20 1738 HA7JDU RV6HEG LN14 194600 -21 1957 JY5IB HA7JDU JN87 (x2) 194715 -13 1245 HA7JDU JY5IB -08
UTC dB Audio Message 225930 -18 1759 HA7JDU M9KER +01 225945 +8 1457 M9KER HA7JDU R-16 230000 -17 1653 HA7JDU UA3ATQ KO85 230000 -19 1767 HA7JDU M9KER RR73 230015 +12 1456 M9KER HA7JDU 73 230030 -13 1652 HA7JDU UA3ATQ KO85 (x2) 230115 +14 1456 SP4WJ HA7JDU -13 230130 -13 1652 HA7JDU UA3ATQ KO85 230145 +16 1456 SP4WJ HA7JDU RR73 230200 -13 1652 HA7JDU UA3ATQ KO85 230200 -6 1856 HA7JDU SP4WJ 73 230230 -12 1652 HA7JDU UA3ATQ KO85 (x3)
UTC dB Audio Message 184500 -19 1502 CQ HA7JDU JN87 (x5)
UTC dB Audio Message 014015 -5 1457 HA7JDU K9KU EN65 014045 -2 1678 HA7JDU WA0DYJ FM18 014045 -8 1457 HA7JDU K9KU R+00 014115 +0 1679 HA7JDU WA0DYJ FM18 014115 -7 1457 HA7JDU K9KU 73 014215 +1 1451 HA7JDU WA0DYJ 73 015300 -11 970 HA7JDU 5Z4VJ KI88 (x5) 024300 -18 1716 CQ HA7JDU JN87 163530 +0 1429 HA7JDU PD0PWH JO21 (x3)
UTC dB Audio Message 151800 -5 1005 HA7JDU DN9SHA 73 152130 -16 2232 HA7JDU PD1GOL JO21 (x2) 152445 -7 2030 HA7JDU DN9BT JO40 (x2) 152545 -7 1689 HA7JDU PD1RMB R+15 153015 -7 1189 HA7JDU PA3AGN JO22 (x3) 153115 +2 2108 HA7JDU IK1RQX JN44 (x4) 154215 -11 657 HA7JDU DN9DKN R+06 (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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