DB3MJ — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving DB3MJ, decoded by SO8OO in southeastern Poland. 101 FT8 messages attributed to this token as transmitter, on 20m, across 8 UTC dates in the available aggregate history. Observed between 2026-08-09 and 2026-08-30.
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 101 FT8 messages attributed to DB3MJ as the transmitting token by decoded message structure across 8 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). Most decodes (93%) fell within the six-hour window 13:00-19:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -13 dB.
Overview
Observed FT8 message patterns
- Attributed sample
- 101 messages
- Active dates
- 8 UTC dates
- Estimated median S/N
- -13 dB
- Estimated 10th-90th percentile
- -20 to -6 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 29, moderate (-15 to -9 dB) 47, strong (≥ -8 dB) 25.
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 DB3MJ 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 DB3MJ
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
- JN49 · 74 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 920 km (approx.)
- Last such locator decoded
- 2026-08-30 15:24 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 | DB3MJ S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 08-30 14:17 | 20m | - / -1 | F4HTV | +3 / - | 4 | Partial capture |
| 08-23 12:51 | 20m | -11 / - | RA9LL | - / - | 2 | Partial capture |
| 08-23 10:13 | 20m | -14 / - | IS0YHV | - / -10 | 2 | Partial capture |
| 08-22 18:49 | 20m | -14 / - | SA7CHI | - / -15 | 6 | Partial capture |
| 08-22 17:10 | 20m | -16 / - | TA2HLE | - / - | 2 | Partial capture |
| 08-22 17:00 | 20m | -12 / - | ON5VN/P | - / +4 | 3 | Partial capture |
| 08-22 15:11 | 20m | -6 / - | RX1AB | - / - | 2 | Partial capture |
| 08-22 14:57 | 20m | -9 / - | G8IXM | - / -19 | 2 | Partial capture |
| 08-22 14:41 | 20m | -9 / - | R2AL | -4 / 0 | 10 | Partial capture |
| 08-22 14:25 | 20m | -12 / - | PI4TX | - / -14 | 2 | ✓ Closing fragment |
| 08-22 13:59 | 20m | -22 / -21 | GJ0KYZ | +13 / - | 5 | Partial capture |
| 08-22 12:21 | 20m | -8 / - | <...> | - / - | 2 | Partial capture |
| 08-20 14:49 | 20m | -5 / -10 | <...> | +5 / - | 11 | Partial capture |
| 08-20 14:43 | 20m | -18 / - | ZA5G | -15 / -14 | 5 | ✓ Closing observed |
| 08-20 14:36 | 20m | -16 / - | ZA5G | -10 / -8 | 3 | ✓ Closing observed |
| 08-20 14:29 | 20m | -11 / - | SV2HTW | -12 / +9 | 4 | ✓ Closing observed |
| 08-20 14:27 | 20m | -8 / - | <...> | - / - | 3 | Partial capture |
| 08-20 14:16 | 20m | -18 / -1 | CT7AUT | -3 / - | 4 | ✓ Full exchange observed |
| 08-20 13:39 | 20m | -14 / - | ZA5G | - / - | 2 | Partial capture |
| 08-19 18:40 | 20m | - / -19 | LZ1WV | +1 / - | 3 | Partial capture |
| 08-19 18:36 | 20m | - / - | EA5IXH | -11 / - | 2 | Partial capture |
| 08-18 18:03 | 40m | - / -13 | ON4CJU | -15 / - | 2 | ✓ Closing fragment |
| 08-18 16:38 | 40m | - / -25 | HA3FIC | 0 / - | 2 | ✓ Closing fragment |
| 08-17 17:13 | 40m | - / -5 | DK7ZT | -18 / - | 2 | Partial capture |
| 08-17 17:13 | 40m | - / - | F5RRS | -18 / - | 3 | Partial capture |
| 08-16 18:10 | 20m | -6 / - | N2BJ | - / - | 3 | Partial capture |
| 08-16 17:55 | 20m | -6 / - | RL3P | - / - | 2 | Partial capture |
| 08-16 17:35 | 20m | - / -18 | OZ7CL | -15 / - | 2 | ✓ Closing fragment |
| 08-16 14:29 | 20m | - / -20 | UA4FEN | +2 / - | 2 | Partial capture |
| 08-16 13:25 | 20m | - / -14 | CT3MD | -8 / - | 2 | ✓ Closing fragment |
| 08-16 10:59 | 20m | - / -23 | RN2FQ | -2 / - | 3 | ✓ Closing fragment |
| 08-16 10:55 | 20m | - / -19 | OE1AVO | -13 / - | 3 | Partial capture |
| 08-16 10:31 | 20m | - / -9 | EA3HKA | -6 / - | 3 | ✓ Closing fragment |
| 08-15 20:32 | 80m | - / -7 | DO6LE | +2 / - | 3 | ✓ Closing fragment |
| 08-15 20:16 | 80m | - / -11 | DO6AZ | 0 / - | 2 | ✓ Closing fragment |
| 08-15 20:07 | 40m | - / -18 | ON4NYO | -14 / - | 2 | ✓ Closing fragment |
| 08-15 20:06 | 40m | - / -4 | DA0YFD | -8 / - | 2 | ✓ Closing fragment |
| 08-15 19:13 | 20m | - / -21 | CN8NS | -11 / - | 5 | ✓ Closing fragment |
| 08-15 16:40 | 20m | - / -16 | EC3A | -20 / - | 2 | ✓ Closing fragment |
| 08-15 15:38 | 20m | -16 / - | PA/DL9PN | - / - | 2 | Partial capture |
| 08-15 14:34 | 20m | - / -17 | LZ2VQ | -8 / - | 4 | ✓ Closing fragment |
| 08-15 08:55 | 20m | - / -23 | R2DX | -23 / - | 5 | ✓ Closing fragment |
| 08-15 08:42 | 20m | - / -14 | RK4FF | +12 / - | 2 | ✓ Closing fragment |
| 08-14 18:49 | 20m | - / -23 | A61CK | -12 / - | 2 | ✓ Closing fragment |
| 08-12 17:25 | 20m | - / -14 | R2FDU | -9 / - | 3 | Partial capture |
| 08-09 16:28 | 20m | - / -15 | UA3VVA | -20 / - | 2 | Partial capture |
| 08-09 12:49 | 20m | - / - | PE9JAN | -17 / - | 2 | Partial capture |
| 08-09 12:16 | 20m | - / -19 | E70SZ | -17 / - | 2 | ✓ Closing fragment |
| 08-09 10:08 | 20m | - / +3 | OZ5AGJ | -13 / - | 2 | ✓ Closing fragment |
| 08-09 09:09 | 20m | - / - | PA0GSP | -6 / - | 2 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 141645 -14 1430 CQ DB3MJ JN49 141700 -8 479 DB3MJ HB9IUI JN36 141730 +11 752 DB3MJ F4HTV JN25 (x4) 151400 -15 1430 CQ DB3MJ JN49 (x9)
UTC dB Audio Message 085345 -13 2439 DB3MJ DF1YQ JO62 200630 -8 2483 DB3MJ DA0YFD -04 200700 -12 1100 DB3MJ ON4NYO -18 (x2) 200830 -9 2483 DB3MJ DA0YFD RR73 171330 -18 1976 DB3MJ F5RRS JN36 171330 -18 1905 DB3MJ DK7ZT -05 (x2) 171430 -20 1327 DB3MJ OE9GWV JN47 171430 -20 1976 DB3MJ F5RRS JN36 (x2) 163815 +1 482 DB3MJ HA3FIC -25 (x2) 180315 -15 2413 DB3MJ ON4CJU -13 (x2)
UTC dB Audio Message 201615 -1 1231 DB3MJ DO6AZ -11 (x2) 203200 +1 1693 DB3MJ DO6LE -07 (x3)
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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