ON4AXU — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Belgium Most frequent locator attributed to this token: JO21

Receiver-side FT8 activity involving ON4AXU, decoded by SO8OO in southeastern Poland. 262 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, 20m, 10m, across 23 UTC dates in the available aggregate history. Observed between 2026-06-10 and 2026-09-19.

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 262 FT8 messages attributed to ON4AXU as the transmitting token by decoded message structure across 23 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (33%), followed by 10 m (32%) and 60 m (21%). Most decodes (56%) fell within the six-hour window 17:00-23:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (68%); the estimated median was -5 dB.

Overview

262
Messages attributed
23
UTC dates decoded
45
Active 15-min windows
-5 dB
Estimated median S/N

Bands

80m · 24 60m · 56 40m · 10 20m · 87 10m · 85
First attributed message: 2026-06-10
Last attributed message: 2026-09-19 21:13 UTC

Observed FT8 message patterns

Attributed sample
262 messages
Active dates
23 UTC dates
Estimated median S/N
-5 dB
Estimated 10th-90th percentile
-16 to +4 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 28, moderate (-15 to -9 dB) 56, strong (≥ -8 dB) 178.

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 ON4AXU 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 ON4AXU

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
JO21 · 169 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,192 km (approx.)
Last such locator decoded
2026-09-19 21:13 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 UTCBandON4AXU S/NCounterpartCounterpart S/NMsgsCapture
09-19 21:12 80m -4 / - RI1FJZ - / - 4 Partial capture
09-08 07:44 40m -14 / - VK5COP - / - 3 Partial capture
08-31 19:51 60m 0 / - GW0KQX -14 / -4 6 ✓ Full exchange observed
08-31 19:48 60m 0 / +7 SM7XON -10 / +4 7 ✓ Full exchange observed
08-30 20:02 20m +9 / - UX7QV - / +5 2 ✓ Closing fragment
08-30 19:59 20m +8 / - KJ1R - / -9 4 ✓ Closing fragment
08-30 19:45 20m -2 / - ON9MD -11 / -7 9 Partial capture
08-30 19:44 20m -3 / - PD1HPB -7 / -16 3 ✓ Closing observed
08-30 19:43 20m +2 / -17 PD3LKN -8 / -18 4 ✓ Full exchange observed
08-30 19:40 20m -5 / - OX3AH - / +4 3 ✓ Closing fragment
08-30 19:37 20m - / -9 IU4PTA +6 / - 2 ✓ Closing fragment
08-29 21:58 60m +3 / +6 ER1CW -14 / - 7 ✓ Full exchange observed
08-29 21:56 60m +3 / -8 4X1GA -18 / -7 6 ✓ Full exchange observed
08-29 20:04 20m -10 / - 9M2HUS - / - 6 Partial capture
08-28 21:24 40m +2 / - V51WH - / -11 7 ✓ Closing fragment
08-28 08:43 10m - / - IU4PPL -14 / - 2 Partial capture
08-28 08:36 10m -21 / - HB9TOC +5 / +1 3 ✓ Full exchange observed
08-28 08:17 10m +5 / - HB0WR - / - 11 Partial capture
08-28 08:16 10m +4 / - A92GE - / - 2 Partial capture
08-25 20:55 20m - / 0 BG7BMG -11 / - 3 Partial capture
08-19 20:58 60m -7 / - DL1LQA 0 / +6 4 ✓ Closing observed
08-19 20:58 60m - / - YL3FW -17 / - 2 Partial capture
08-19 20:56 60m -9 / -4 GW3TYI -10 / -5 6 ✓ Full exchange observed
08-19 20:54 60m -8 / - OJ0JR - / -6 3 ✓ Closing fragment
08-19 20:53 60m -7 / - TA6B - / - 3 Partial capture
08-12 15:29 10m -5 / - 3A2MW - / -10 5 ✓ Closing fragment
08-12 15:27 10m 0 / - MD0CCE - / - 3 ✓ Closing fragment
08-11 13:47 20m -2 / - <...> - / - 5 Partial capture
08-09 09:50 20m -8 / - A61QQ - / -6 2 ✓ Closing fragment
08-09 09:45 20m -8 / - <...> - / - 2 Partial capture
08-09 09:44 20m -11 / - EN35UKR - / - 2 Partial capture
08-08 21:41 60m -4 / 0 DK6AH -14 / - 5 ✓ Closing observed
08-08 21:39 60m - / - S56FPW -2 / - 3 Partial capture
08-08 21:38 60m -4 / -7 SV1SSL -2 / +1 5 Partial capture
08-08 21:33 60m -5 / - ZZ1M - / -15 2 Partial capture
08-08 17:29 20m - / - YO5PHL -12 / - 3 Partial capture
08-08 17:28 20m - / - F1PPH -12 / - 2 Partial capture
07-28 19:39 10m -22 / - XQ3SK - / -7 2 ✓ Closing fragment
07-28 19:33 10m -18 / - LT2D - / -4 2 ✓ Closing fragment
07-23 21:15 60m +2 / -3 DD7EE +1 / - 4 ✓ Closing observed
07-23 21:13 60m -1 / +7 TK5K +12 / - 5 ✓ Full exchange observed
07-23 21:12 60m -1 / - DH5LS -12 / +4 5 ✓ Full exchange observed
07-23 21:10 60m 0 / - TK5K - / - 2 Partial capture
07-19 00:51 80m -4 / - WB8SCG - / - 2 ✓ Closing fragment
07-19 00:49 80m -6 / - DA6PM - / -6 2 ✓ Closing fragment
07-19 00:44 80m -2 / - WB8SCG - / -12 8 ✓ Closing fragment
07-19 00:34 80m 0 / - W9JOY - / -14 4 ✓ Closing fragment
07-19 00:24 80m +6 / - 8S7DL -3 / +2 5 ✓ Closing observed
07-19 00:21 80m +11 / -14 TN8GD -22 / - 3 ✓ Closing observed
07-18 19:42 10m - / - F4BHK -12 / - 5 Partial capture

Recent FT8 messages decoded at SO8OO

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

80m 
UTC    dB Audio  Message
004545  -2 1904  WB8SCG ON4AXU R-12 (x6)
004915  -5 1903  DA6PM ON4AXU -06 (x2)
005145  -4 1903  WB8SCG ON4AXU 73 (x2)
005300 -24 1903  ON4AXU R4FDD -19
211215  -3  358  RI1FJZ ON4AXU JO21 (x4)
40m 
UTC    dB Audio  Message
212400  +2 2265  V51WH ON4AXU JO21 (x7)
074400 -12 1074  VK5COP ON4AXU JO21 (x3)
60m 
UTC    dB Audio  Message
220100 -13 1689  ON4AXU ER1CW RR73
220115  +5 1345  ER1CW ON4AXU 73
194800  +0 1405  SM7XON ON4AXU JO21 (x3)
194915 -11 1332  ON4AXU SM7XON +07
194930  +0 1404  SM7XON ON4AXU R+04
194945  -9 1332  ON4AXU SM7XON RR73
195000  -2 1405  SM7XON ON4AXU 73
195130  -2 1405  GW0KQX ON4AXU JO21 (x3)
195245 -14  881  ON4AXU GW0KQX +15
195300  +3 1405  GW0KQX ON4AXU R-04 (x2)
20m 
UTC    dB Audio  Message
194715  -1  769  ON9MD ON4AXU -09
194730 -11  770  ON4AXU ON9MD JO21 (x3)
195930 -20 2333  ON4AXU BG7BMG -14
195945  +6  826  KJ1R ON4AXU -09 (x4)
200145 +11  825  CQ ON4AXU JO21 (x2)
200245  +7  825  UX7QV ON4AXU +05 (x2)
200345 +13  825  CQ ON4AXU JO21 (x2)
10m 
UTC    dB Audio  Message
081845  +4  659  HB0WR ON4AXU JO21 (x10)
083645  +3 2436  ON4AXU HB9TOC +13
083700 -21 1670  HB9TOC ON4AXU R+01
083715  +7 2435  ON4AXU HB9TOC RR73
084330 -17 1616  ON4AXU IU4PPL JN54 (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