RU3DBT — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: KO95

Receiver-side FT8 activity involving RU3DBT, decoded by SO8OO in southeastern Poland. 3,483 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, 10m, across 51 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-09-17.

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 3,483 FT8 messages attributed to RU3DBT as the transmitting token by decoded message structure across 51 UTC dates in the available aggregate history. The largest monitored-band total was 160 m (41%), followed by 20 m (27%) and 80 m (22%). Most decodes (60%) fell within the six-hour window 17:00-23:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (65%); the estimated median was -17.4 dB.

Overview

3,483
Messages attributed
51
UTC dates decoded
383
Active 15-min windows
-17.4 dB
Estimated median S/N

Bands

160m · 1,413 80m · 768 40m · 364 20m · 935 10m · 3
First attributed message: 2026-06-06
Last attributed message: 2026-09-17 20:16 UTC

Observed FT8 message patterns

Attributed sample
3,483 messages
Active dates
51 UTC dates
Estimated median S/N
-17.4 dB
Estimated 10th-90th percentile
-23 to -11 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 2,275, moderate (-15 to -9 dB) 1,005, strong (≥ -8 dB) 203.

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 RU3DBT 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 RU3DBT

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
KO95 · 2,736 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,309 km (approx.)
Last such locator decoded
2026-09-17 20:16 UTC

Other locator fields attributed to this token: KO94 (12).

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 UTCBandRU3DBT S/NCounterpartCounterpart S/NMsgsCapture
09-17 20:14 160m -16 / - 9A5E - / - 3 Partial capture
09-17 20:12 160m -19 / - RA3DA - / - 5 Partial capture
09-17 20:09 160m -14 / - RA8AO - / - 2 Partial capture
09-17 20:08 160m -16 / - RA3DA - / - 2 Partial capture
09-17 20:05 160m -18 / - R7ZY - / - 3 Partial capture
09-17 20:02 160m -13 / - OK2BUZ - / - 4 Partial capture
09-17 20:00 160m -15 / - R7ZY - / - 4 Partial capture
09-17 19:58 160m -14 / - RA8AO - / - 2 Partial capture
09-17 19:51 160m -18 / - JH3IVO - / - 2 Partial capture
09-17 19:41 160m - / -13 EW6CB 0 / - 4 ✓ Closing fragment
09-17 04:36 40m - / -17 ON5LW +8 / - 2 ✓ Closing fragment
09-17 04:33 40m - / -22 DL2KBX -4 / - 3 Partial capture
09-17 03:34 40m - / -4 RN6LPC 0 / - 2 ✓ Closing fragment
09-17 03:25 40m -23 / -14 RX6ABW -4 / - 4 Partial capture
09-17 03:24 40m -20 / - RZ9A -13 / - 3 ✓ Closing observed
09-15 23:54 40m - / -15 GM6URC -9 / - 3 ✓ Closing fragment
09-15 21:10 160m -19 / -16 HA8BE +6 / - 4 ✓ Closing observed
09-15 18:54 160m - / -18 RA3RTB -18 / - 3 ✓ Closing fragment
09-15 18:47 160m - / - RA3RTB -15 / - 4 Partial capture
09-15 18:35 160m -13 / -17 RU6C 0 / - 3 ✓ Closing observed
09-15 18:30 160m -16 / -17 IV3FSG +4 / - 11 Partial capture
09-15 18:28 160m -16 / -19 RU6C +2 / - 4 Partial capture
09-15 18:25 160m -10 / - R9SAP - / - 4 Partial capture
09-15 18:21 160m -10 / -19 IV3FSG +8 / - 4 Partial capture
09-15 18:21 160m -18 / -21 SV2AEL +9 / - 4 Partial capture
09-15 18:15 160m -13 / - IV3FSG - / - 4 Partial capture
09-15 17:53 160m -16 / - R7DX - / - 7 Partial capture
09-15 17:47 160m -13 / -17 UA3ZQN -5 / -16 5 ✓ Full exchange observed
09-15 17:45 160m - / -10 OM3SX +9 / - 3 ✓ Closing fragment
09-14 19:41 160m -22 / -15 SP9ENV -7 / - 4 Partial capture
09-14 19:37 160m -21 / - RL7Z - / - 3 Partial capture
09-14 19:29 160m -23 / - RL7Z - / - 3 Partial capture
09-14 19:25 160m -20 / - UY2RA - / - 2 Partial capture
09-14 19:21 160m -20 / - R3ICU - / -14 2 ✓ Closing fragment
09-14 19:12 160m -23 / - RQ3H - / - 3 Partial capture
09-14 19:09 160m -21 / - RU6C - / - 4 Partial capture
09-14 19:06 160m -19 / - R5AT - / - 3 ✓ Closing fragment
09-14 18:54 160m -24 / -7 UR4LRG +8 / -6 3 ✓ Full exchange observed
09-14 18:49 160m - / -12 UB1Q -14 / - 2 ✓ Closing fragment
09-14 18:45 160m -22 / -9 RX3PX -10 / -6 4 ✓ Full exchange observed
09-14 18:35 160m -22 / - RX3PX - / - 8 Partial capture
09-14 18:11 160m -22 / - RY2A - / -4 3 Partial capture
09-14 17:57 160m - / -10 R3HH +2 / - 3 ✓ Closing fragment
09-14 17:54 160m -23 / -10 R4DI -12 / -8 3 ✓ Full exchange observed
09-14 17:51 160m -23 / -8 RU3DNN -11 / -4 3 ✓ Full exchange observed
09-14 17:49 160m -24 / - RK4F - / -5 6 ✓ Closing fragment
09-14 17:30 160m -23 / - R4FDK - / - 5 Partial capture
09-14 17:18 160m -23 / -16 R9SAP -14 / - 3 Partial capture
09-14 17:15 160m - / -4 RA3SI -4 / - 3 ✓ Closing fragment
09-14 17:13 160m -22 / -2 R4DD -20 / -9 2 Partial capture

Recent FT8 messages decoded at SO8OO

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

160m 
UTC    dB Audio  Message
200530 -17 1209  R7ZY RU3DBT KO95 (x2)
200630 -19 1208  RA8AO RU3DBT KO95
200830 -17 1209  RA3DA RU3DBT KO95 (x2)
200930 -14 1208  RA8AO RU3DBT KO95 (x2)
201200 -21 1208  RA3DA RU3DBT KO95 (x5)
201430 -18 1208  9A5E RU3DBT KO95 (x3)
40m 
UTC    dB Audio  Message
032700  -3  837  RU3DBT RX6ABW -14 (x2)
033015 -24 1383  UA9SY RU3DBT -04
033400  -2 1790  RU3DBT RN6LPC -04 (x2)
033530  +0 2243  RU3DBT RA6ATZ RR73
033715 -23 1383  CQ RU3DBT KO95
034715 -20 1383  IT8/HB9TLL RU3DBT KO95
043330  -3 1046  RU3DBT DL2KBX -22 (x3)
043600  +9 1288  RU3DBT ON5LW -17 (x2)
043815 -23 1384  CQ RU3DBT KO95 (x2)
80m 
UTC    dB Audio  Message
022730  -7 1327  CQ RU3DBT KO95 (x15)
20m 
UTC    dB Audio  Message
084230  +8  457  RU3DBT EA3HMM JN00 (x3)
072800 -24 1390  RU3DBT F5GPE JN25
072830 -17 1869  RU3DBT RC9WC -02
072830 -21 1391  RU3DBT F5GPE JN25
072900 -17 1860  RU3DBT F4FSY -12 (x2)
051915 -24 1659  RU3DBT TA3ZGR -16
060800 -18 1661  RU3DBT US1EA KN78
164900  -6  729  RU3DBT A61QQ -13 (x2)
124230 -11 2470  RU3DBT UA4FQO -10 (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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