DD4YR — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving DD4YR, decoded by SO8OO in southeastern Poland. 12 FT8 messages attributed to this token as transmitter, on 20m, across 2 UTC dates in the available aggregate history. Observed between 2026-07-26 and 2026-07-27.
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 12 FT8 messages attributed to DD4YR as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). In this small sample, the estimated median decoder S/N was -7 dB; no usual signal pattern is inferred.
Overview
Observed FT8 message patterns
- Attributed sample
- 12 messages
- Active dates
- 2 UTC dates
- Estimated median S/N
- -7 dB
- S/N percentile sample
- Too small
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 5, strong (≥ -8 dB) 7.
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 DD4YR in decoded directed-looking exchanges:
Most frequent locator attributed to DD4YR
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
- JN57 · 5 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 836 km (approx.)
- Last such locator decoded
- 2026-07-26 06:04 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 | DD4YR S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 07-27 19:13 | 20m | -6 / - | BG5GFU | - / -7 | 3 | ✓ Closing fragment |
| 07-27 19:12 | 20m | -2 / - | SP0LPR | - / +1 | 2 | ✓ Closing fragment |
| 07-26 06:03 | 20m | -10 / - | JT1FDB | - / - | 2 | Partial capture |
| 07-26 05:51 | 20m | -10 / - | LZ2XF | -16 / - | 3 | ✓ Closing observed |
| 07-26 05:51 | 20m | -6 / - | JT1NQ | - / - | 2 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 055100 -7 780 JT1NQ DD4YR JN57 055115 -14 1765 DD4YR LZ2XF KN33 055130 -5 780 JT1NQ DD4YR JN57 055230 -10 780 LZ2XF DD4YR RR73 055245 -17 1765 DD4YR LZ2XF 73 055600 -14 1365 CQ DD4YR JN57 060330 -11 1365 JT1FDB DD4YR JN57 (x2) 191130 -2 1365 YO4NF DD4YR 73 191200 -1 1365 SP0LPR DD4YR +01 (x2) 191300 -2 1365 BG5GFU DD4YR -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.
FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee