R3WDU — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: KO71

Receiver-side FT8 activity involving R3WDU, decoded by SO8OO in southeastern Poland. 243 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 8 UTC dates in the available aggregate history. Observed between 2026-08-23 and 2026-09-11.

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 243 FT8 messages attributed to R3WDU as the transmitting token by decoded message structure across 8 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (56%), followed by 20 m (27%) and 80 m (17%). Most decodes (84%) 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 -16 dB.

Overview

243
Messages attributed
8
UTC dates decoded
47
Active 15-min windows
-16 dB
Estimated median S/N

Bands

80m · 42 40m · 135 20m · 66
First attributed message: 2026-08-23
Last attributed message: 2026-09-11 15:48 UTC

Observed FT8 message patterns

Attributed sample
243 messages
Active dates
8 UTC dates
Estimated median S/N
-16 dB
Estimated 10th-90th percentile
-22 to -11 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 144, moderate (-15 to -9 dB) 92, 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.

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with R3WDU 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 R3WDU

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
KO71 · 59 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
945 km (approx.)
Last such locator decoded
2026-09-11 15:40 UTC

Other locator fields attributed to this token: KO81 (44).

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 UTCBandR3WDU S/NCounterpartCounterpart S/NMsgsCapture
10-04 13:03 40m - / - SP3QDE -4 / - 3 Partial capture
09-11 16:39 160m - / -13 RA3QTT -4 / - 2 ✓ Closing fragment
09-11 15:47 40m -16 / - HG8LXL - / -5 2 ✓ Closing fragment
09-11 15:45 40m -17 / -1 RA3TVW -12 / +9 4 ✓ Full exchange observed
09-11 15:43 40m - / -14 RG5A +3 / - 2 ✓ Closing fragment
09-11 15:34 40m - / - HG8LXL -1 / - 2 Partial capture
09-01 20:08 40m - / +1 R6DZR +3 / - 2 Partial capture
09-01 19:21 40m -16 / - TA2EE - / - 2 ✓ Closing fragment
09-01 19:14 40m - / - R6YG +2 / - 2 Partial capture
09-01 18:55 40m -16 / -16 OE6TNO -1 / -23 12 Partial capture
09-01 18:50 40m -12 / - R1BDX - / -7 2 ✓ Closing fragment
09-01 18:45 40m - / - DF8RU +8 / - 2 Partial capture
09-01 18:43 40m -9 / -14 UA4PDJ -13 / -13 3 Partial capture
09-01 18:36 40m - / - PA3FR +1 / - 2 Partial capture
09-01 18:29 40m - / -10 R4FV +2 / - 2 ✓ Closing fragment
09-01 18:23 40m - / -13 OT8T -11 / - 3 Partial capture
09-01 18:22 40m -19 / - E70SZ +3 / -15 7 ✓ Closing observed
09-01 18:18 40m -18 / -10 YO4NF +7 / -7 5 ✓ Full exchange observed
09-01 18:17 40m -15 / - OT8T -12 / -17 5 Partial capture
09-01 18:15 40m -18 / -4 R6AC -10 / -15 7 ✓ Full exchange observed
09-01 18:13 40m -15 / -10 DL6UM +1 / - 9 ✓ Closing observed
09-01 18:13 40m -14 / -17 LX1NO +10 / -10 12 ✓ Full exchange observed
09-01 18:12 40m - / - DJ0MAB +3 / - 2 Partial capture
09-01 18:11 40m -14 / - RZ4FWA - / -17 4 ✓ Closing fragment
09-01 18:07 40m -15 / - RA3RPW - / -14 4 ✓ Closing fragment
09-01 18:02 40m - / -11 UC6D +7 / - 2 ✓ Closing fragment
08-31 18:40 80m - / -16 RT4A -10 / - 2 Partial capture
08-31 17:53 80m -18 / -11 R6ZEJ -4 / -5 8 ✓ Full exchange observed
08-31 17:53 80m -20 / - UA3LKM - / - 3 ✓ Closing fragment
08-31 17:50 80m -18 / -8 RA3QM -9 / - 2 Partial capture
08-31 17:46 80m - / -6 RV3FF -3 / - 2 ✓ Closing fragment
08-31 17:43 80m - / -11 R3ZBY -6 / - 2 ✓ Closing fragment
08-31 17:40 80m - / -16 R5BM -5 / - 2 ✓ Closing fragment
08-31 17:38 80m - / -14 UA3RMB 0 / - 5 ✓ Closing fragment
08-31 17:33 80m - / -8 UB6OAK -18 / - 2 Partial capture
08-31 17:30 80m - / -7 RV3FF -3 / - 4 Partial capture
08-31 17:21 80m - / -12 R3PLN +4 / - 3 ✓ Closing fragment
08-31 17:18 80m - / -14 RX3DRC -14 / - 3 ✓ Closing fragment
08-31 17:14 80m - / -9 UB3PAQ -14 / - 2 ✓ Closing fragment
08-31 17:04 20m - / - G4DBW +8 / - 2 Partial capture
08-31 16:48 20m - / -13 R8CGT -2 / - 3 ✓ Closing fragment
08-31 16:40 20m - / -12 EA3ADX -4 / - 5 ✓ Closing fragment
08-31 16:17 40m -21 / - OM0FL -14 / -22 4 ✓ Closing observed
08-31 16:16 40m -18 / -12 RX6LHY -12 / -18 4 ✓ Full exchange observed
08-31 16:09 40m -19 / -9 RC5F -4 / - 4 ✓ Closing observed
08-31 15:45 40m -20 / - R6OY -18 / -8 2 ✓ Closing observed
08-31 15:40 40m -21 / - RC3LD -24 / -11 2 ✓ Closing observed
08-31 15:39 40m -16 / - R9FDM - / -18 2 ✓ Closing fragment
08-31 15:22 20m - / - F5SJC +8 / - 3 ✓ Closing fragment
08-31 14:49 20m - / - F5IXN 0 / - 4 Partial capture

Recent FT8 messages decoded at SO8OO

Frequency values are decoder audio offsets in hertz, not RF frequencies.

40m 
UTC    dB Audio  Message
153930 -16 2024  RC9WC R3WDU R+08
154030 -17 2023  CQ R3WDU KO71
154230 -15 2023  RW3SB R3WDU -08
154345  +3  481  R3WDU RG5A R-14 (x2)
154515 -13 1835  R3WDU RA3TVW -01 (x2)
154600 -17 2024  RA3TVW R3WDU R+09
154615 -12 1835  R3WDU RA3TVW RR73
154730 -14 2023  HG8LXL R3WDU -05 (x2)
182215  -3 1131  R3WDU RY9C -14
130315  -4 1957  R3WDU SP3QDE JO92 (x3)
160m 
UTC    dB Audio  Message
163915  -5 1054  R3WDU RA3QTT -13 (x2)
80m 
UTC    dB Audio  Message
175345  -6  597  R3WDU R6ZEJ KN98
175400 -19 1981  UA3LKM R3WDU RR73
175415  -6  597  R3WDU R6ZEJ KN98
175430 -22 1981  UA3LKM R3WDU RR73
175445  -5  597  R3WDU R6ZEJ KN98 (x2)
175530 -18 1981  R6ZEJ R3WDU -05
175545  -2  597  R3WDU R6ZEJ R-11
175600 -19 1982  R6ZEJ R3WDU RR73
175615  +3  597  R3WDU R6ZEJ 73
175730 -24 1982  CQ R3WDU KO71
175800 -24 1981  UB4CJS R3WDU R-08
180330  +3 1526  R3WDU RW3YS R-12
184015  -5  668  R3WDU RT4A -16 (x2)
20m 
UTC    dB Audio  Message
152345 +14 1005  R3WDU F5SJC 73
152645  -3 2041  R3WDU EB3JT JN01
164015  -4 2031  R3WDU EA3ADX -12 (x5)
164445  -4 1227  R3WDU RA6FSV LN05
164715  -6 2041  R3WDU EA1CQ IN83
164845  -4  393  R3WDU R8CGT -13 (x3)
165215  +0  569  R3WDU EA1CQ R-16
170445  +9 2244  R3WDU G4DBW JO01 (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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