DH4BM — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving DH4BM, decoded by SO8OO in southeastern Poland. 765 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, 20m, 10m, across 28 UTC dates in the available aggregate history. Observed between 2026-06-11 and 2026-09-20.
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 765 FT8 messages attributed to DH4BM as the transmitting token by decoded message structure across 28 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (47%), followed by 60 m (29%) and 80 m (21%). Most decodes (95%) fell within the six-hour window 16:00-22:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -8 dB.
Overview
Bands
Last attributed message: 2026-09-20 21:06 UTC
Observed FT8 message patterns
- Attributed sample
- 765 messages
- Active dates
- 28 UTC dates
- Estimated median S/N
- -8 dB
- Estimated 10th-90th percentile
- -15 to 0 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 68, moderate (-15 to -9 dB) 289, strong (≥ -8 dB) 408.
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 DH4BM 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 DH4BM
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
- JO50 · 408 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 770 km (approx.)
- Last such locator decoded
- 2026-09-20 21:05 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 | DH4BM S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-20 21:05 | 60m | -8 / - | DL9BDR | -18 / -14 | 4 | ✓ Closing observed |
| 09-20 21:03 | 60m | -7 / -3 | IK5ZPV | -12 / -10 | 5 | ✓ Full exchange observed |
| 09-20 21:01 | 60m | -2 / +9 | SN40KZE | +3 / -10 | 3 | Partial capture |
| 09-20 20:55 | 80m | -2 / - | G0MSE | - / -20 | 2 | ✓ Closing fragment |
| 09-20 20:50 | 80m | -13 / - | DH4NBB | -5 / -8 | 7 | ✓ Full exchange observed |
| 09-20 20:48 | 80m | -6 / - | DL9DAJ | - / -9 | 2 | Partial capture |
| 09-20 20:47 | 80m | -8 / -7 | PA1K | -13 / -12 | 5 | ✓ Full exchange observed |
| 09-20 20:45 | 80m | -17 / -17 | DH2PC | +12 / - | 3 | ✓ Closing observed |
| 09-20 20:40 | 80m | - / -10 | M6XZD | -9 / - | 2 | ✓ Closing fragment |
| 09-20 20:38 | 80m | -14 / -4 | IU3MAG | -4 / - | 3 | ✓ Closing observed |
| 09-20 20:36 | 80m | -8 / - | EC3A | - / -19 | 2 | ✓ Closing fragment |
| 09-20 20:34 | 80m | -13 / +1 | DM1YS | +2 / 0 | 5 | ✓ Full exchange observed |
| 09-20 20:33 | 80m | -7 / - | IQ0AAI | - / -15 | 2 | ✓ Closing fragment |
| 09-20 20:30 | 80m | - / +1 | SO100PKP | +10 / - | 2 | Partial capture |
| 09-20 20:29 | 80m | -18 / - | II7IAME | - / 0 | 2 | Partial capture |
| 09-17 20:40 | 60m | -4 / -1 | LB9RE | -12 / -15 | 5 | ✓ Full exchange observed |
| 09-17 20:33 | 60m | -1 / - | M0LTA | -15 / -12 | 4 | ✓ Closing observed |
| 09-17 20:30 | 60m | +1 / +5 | G0VDE | -5 / -13 | 4 | Partial capture |
| 09-17 20:28 | 60m | -9 / - | OZ/DG4BRT | - / -16 | 2 | Partial capture |
| 09-17 20:26 | 60m | -4 / - | PF1B | -14 / -12 | 3 | ✓ Closing observed |
| 09-17 20:24 | 60m | +5 / -7 | DL8OCI | 0 / - | 2 | Partial capture |
| 09-17 20:21 | 60m | -7 / - | DG3DJ | - / -10 | 3 | ✓ Closing fragment |
| 09-17 20:19 | 60m | +2 / -5 | II9IAGM | -7 / -22 | 3 | Partial capture |
| 09-17 16:00 | 40m | -4 / -15 | DH9ET | -6 / -11 | 4 | ✓ Full exchange observed |
| 09-17 15:57 | 40m | -5 / - | DK1IO | - / - | 2 | Partial capture |
| 09-13 19:36 | 40m | -13 / - | G0LZX | +4 / - | 3 | ✓ Closing observed |
| 09-13 19:16 | 40m | - / -7 | OZ1A | 0 / - | 2 | ✓ Closing fragment |
| 09-13 14:06 | 40m | -10 / - | DH1DK | - / - | 2 | ✓ Closing fragment |
| 09-13 14:00 | 40m | - / 0 | DL6EL | -1 / - | 3 | ✓ Closing fragment |
| 09-13 13:59 | 40m | - / -15 | DL3KDP | -16 / - | 2 | ✓ Closing fragment |
| 09-13 09:48 | 40m | - / -2 | DL7VAR | +10 / - | 2 | ✓ Closing fragment |
| 09-13 09:46 | 40m | - / -10 | DL3XAK | -18 / - | 2 | ✓ Closing fragment |
| 09-13 09:37 | 40m | - / 0 | DL0DM | -16 / - | 2 | ✓ Closing fragment |
| 09-13 09:24 | 40m | - / - | DK2SW | -14 / - | 2 | ✓ Closing fragment |
| 09-13 09:23 | 40m | - / -12 | OZ9FF | -12 / - | 2 | ✓ Closing fragment |
| 09-03 21:14 | 60m | +2 / - | DG1KFR | +4 / - | 4 | Partial capture |
| 09-03 21:10 | 40m | -16 / - | 3Z100PKP | - / -16 | 2 | Partial capture |
| 09-01 21:18 | 60m | -1 / - | DL3FAV | - / -17 | 3 | ✓ Closing fragment |
| 09-01 21:06 | 40m | -16 / -9 | G5GDX | -10 / - | 3 | ✓ Closing observed |
| 08-30 21:32 | 80m | +6 / -3 | SH0T | -4 / -12 | 5 | ✓ Full exchange observed |
| 08-30 21:28 | 80m | -3 / -6 | DL3HN | +5 / -19 | 5 | ✓ Full exchange observed |
| 08-30 21:26 | 80m | +1 / -13 | DL1WZ | -4 / -13 | 5 | ✓ Full exchange observed |
| 08-30 21:25 | 80m | -4 / -8 | DH1PS | +3 / -9 | 4 | ✓ Full exchange observed |
| 08-30 21:24 | 80m | -1 / -10 | SM7TZK | -1 / -7 | 6 | ✓ Full exchange observed |
| 08-30 21:22 | 80m | -8 / -17 | EC5M | -18 / -16 | 5 | ✓ Full exchange observed |
| 08-30 21:21 | 80m | +7 / -18 | EJ8JCB | -8 / -20 | 5 | ✓ Full exchange observed |
| 08-30 21:19 | 80m | -6 / -12 | M1DBW | -8 / -14 | 5 | ✓ Full exchange observed |
| 08-30 21:18 | 80m | -6 / -3 | OZ1IVA | -2 / -13 | 5 | ✓ Full exchange observed |
| 08-30 21:11 | 40m | -17 / -5 | G4DBW | -2 / -6 | 4 | ✓ Full exchange observed |
| 08-27 20:18 | 20m | -18 / - | M7HQE | - / -15 | 3 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 204215 -9 1591 LB9RE DH4BM R-15 204230 -12 1592 DH4BM LB9RE RR73 204245 -3 1591 LB9RE DH4BM 73 210130 -6 2272 SN40KZE DH4BM JO50 210145 +3 2272 DH4BM SN40KZE +09 210200 +1 2273 SN40KZE DH4BM R-10 210330 -11 1210 IK5ZPV DH4BM JO50 210345 -12 1210 DH4BM IK5ZPV -03 210400 -4 1210 IK5ZPV DH4BM R-10 210415 -12 1210 DH4BM IK5ZPV RR73 210430 -7 1211 IK5ZPV DH4BM 73 210500 -5 1849 DL9BDR DH4BM JO50 (x2) 210545 -18 1850 DH4BM DL9BDR RR73 210600 -9 1849 DL9BDR DH4BM 73
UTC dB Audio Message 204730 -10 1617 PA1K DH4BM R-12 204745 -14 1205 DH4BM PA1K RR73 204800 -1 1617 PA1K DH4BM 73 204845 -6 1617 DL9DAJ DH4BM JO50 (x2) 205030 -14 1625 DH4NBB DH4BM JO50 (x4) 205215 -5 1790 DH4BM DH4NBB +12 205230 -18 1626 DH4NBB DH4BM R-08 (x2) 205400 -14 1626 IZ7ECL DH4BM JO50 205515 -6 1625 G0MSE DH4BM R-20 (x2)
UTC dB Audio Message 193630 -10 783 G0LZX DH4BM JO50 193715 +4 784 DH4BM G0LZX RR73 193730 -16 784 G0LZX DH4BM 73 201800 -8 680 DH4BM CT2HEX IM58 155200 -15 1053 G4SPE DH4BM JO50 155530 -15 2210 DL1JPW DH4BM JO50 155700 -4 2701 DK1IO DH4BM JO50 (x2) 160000 -4 534 DH9ET DH4BM JO50 160015 -6 534 DH4BM DH9ET -15 160030 -4 534 DH9ET DH4BM R-11 (x2) 160615 -16 867 DH4BM DL2SUD +01 173230 -11 886 F4NEM/P DH4BM JO50 184915 -9 929 AM3MERCE DH4BM JO50
UTC dB Audio Message 180515 -4 2140 DH4BM IK8NRQ +04 180715 +2 1420 DH4BM EA5JLN -16 (x2) 183315 -9 1620 DH4BM EA2EWL RR73 184100 -1 1329 DH4BM GM5WXA -04 (x2) 184300 +4 1802 DH4BM MM0GTU -19 184900 -19 937 YI1QEA DH4BM JO50 (x2) 200345 -3 738 DH4BM II7MGBT -21 (x2) 201145 -2 668 DH4BM GB50PUNK -05 201800 -19 964 M7HQE DH4BM JO50 (x3)
UTC dB Audio Message 191345 -12 2273 DH4BM G4DBW -11 (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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