DC4THF — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving DC4THF, decoded by SO8OO in southeastern Poland. 48 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 5 UTC dates in the available aggregate history. Observed between 2026-06-10 and 2026-09-23.
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 48 FT8 messages attributed to DC4THF as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (44%), followed by 40 m (38%) and 10 m (15%). The busiest six-hour window was 09:00-15:00 UTC, containing 40% of decodes. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (79%); the estimated median was -3 dB.
Overview
Bands
Last attributed message: 2026-09-23 19:21 UTC
Observed FT8 message patterns
- Attributed sample
- 48 messages
- Active dates
- 5 UTC dates
- Estimated median S/N
- -3 dB
- Estimated 10th-90th percentile
- -10 to +6 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 10, strong (≥ -8 dB) 38.
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 DC4THF 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 DC4THF
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
- JO62 · 30 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 675 km (approx.)
- Last such locator decoded
- 2026-09-23 09:49 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 | DC4THF S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-23 19:21 | 80m | -6 / -12 | RA2FU | +4 / +8 | 4 | ✓ Full exchange observed |
| 09-23 09:51 | 40m | -12 / - | GJ0KYZ | - / +2 | 2 | Partial capture |
| 09-23 09:49 | 40m | -11 / -10 | 9A9TT | -2 / +2 | 6 | ✓ Full exchange observed |
| 09-23 02:51 | 80m | +2 / - | F1TFT | - / - | 2 | Partial capture |
| 09-23 02:40 | 40m | - / +3 | IU8RFW | -4 / - | 5 | ✓ Closing fragment |
| 09-23 02:32 | 80m | -4 / -10 | ON4MAP | -7 / - | 8 | Partial capture |
| 09-23 02:29 | 80m | 0 / - | WA3SWJ | - / - | 2 | Partial capture |
| 09-23 02:25 | 80m | +2 / -4 | OH7FES | -7 / -1 | 6 | ✓ Full exchange observed |
| 09-23 02:24 | 80m | +5 / - | DO8JB | - / - | 2 | Partial capture |
| 09-23 02:22 | 80m | 0 / -8 | UA4FKT | +8 / - | 5 | ✓ Full exchange observed |
| 09-22 17:13 | 80m | - / - | HF5A | -2 / - | 2 | Partial capture |
| 09-22 15:34 | 40m | -6 / - | UA9XL | - / - | 3 | Partial capture |
| 09-22 15:31 | 40m | -6 / - | UA9XL | - / - | 2 | Partial capture |
| 09-22 15:28 | 40m | -4 / -5 | IN3OWY | -18 / -4 | 3 | ✓ Full exchange observed |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 023215 -8 1502 DC4THF ON4MAP -10 023230 -7 1013 ON4MAP DC4THF JO62 023245 -7 1502 DC4THF ON4MAP -10 (x2) 023330 +1 501 RN6HK DC4THF JO62 023345 -8 1502 DC4THF ON4MAP -10 (x3) 025100 -7 1226 R7CD DC4THF JO62 025130 +3 500 F1TFT DC4THF JO62 (x2) 192100 +3 637 DC4THF RA2FU -12 192115 -3 638 RA2FU DC4THF R+08 192130 +4 637 DC4THF RA2FU RRR 192145 -10 638 RA2FU DC4THF 73
UTC dB Audio Message 024015 -6 534 DC4THF IU8RFW JN70 (x5) 094700 -7 638 M6XZD DC4THF JO62 094800 -8 638 F1GUQ DC4THF RR73 094900 -10 1196 9A9TT DC4THF JO62 094915 -1 1196 DC4THF 9A9TT -10 094930 -10 1196 9A9TT DC4THF R+02 (x2) 095015 -2 1196 DC4THF 9A9TT RR73 095030 -14 1196 9A9TT DC4THF 73 095100 -15 1196 GJ0KYZ DC4THF R+02 (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.
FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee