ON4MHZ — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Belgium Most frequent locator attributed to this token: JN29

Receiver-side FT8 activity involving ON4MHZ, decoded by SO8OO in southeastern Poland. 382 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, across 12 UTC dates in the available aggregate history. Observed between 2026-09-21 and 2026-10-02.

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 382 FT8 messages attributed to ON4MHZ as the transmitting token by decoded message structure across 12 UTC dates in the available aggregate history. The largest monitored-band total was 60 m (66%), followed by 40 m (23%) and 80 m (11%). Most decodes (91%) fell within the six-hour window 17:00-23:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -14.1 dB.

Overview

382
Messages attributed
12
UTC dates decoded
68
Active 15-min windows
-14.1 dB
Estimated median S/N

Bands

80m · 43 60m · 251 40m · 88
First attributed message: 2026-09-21
Last attributed message: 2026-10-02 21:16 UTC

Observed FT8 message patterns

Attributed sample
382 messages
Active dates
12 UTC dates
Estimated median S/N
-14.1 dB
Estimated 10th-90th percentile
-22 to -6 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 165, moderate (-15 to -9 dB) 140, strong (≥ -8 dB) 77.

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 ON4MHZ 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 ON4MHZ

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
JN29 · 223 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,206 km (approx.)
Last such locator decoded
2026-10-02 21:16 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 UTCBandON4MHZ S/NCounterpartCounterpart S/NMsgsCapture
10-02 21:14 60m -12 / - F4HDR - / - 2 Partial capture
10-02 21:04 60m -22 / -16 IU2VUZ -24 / -13 4 Partial capture
10-02 21:00 60m -14 / - 4L7T - / - 3 Partial capture
10-02 20:40 80m - / - DO4DXA -4 / - 4 Partial capture
10-02 20:39 80m -22 / -17 DK7TX -6 / -7 3 ✓ Full exchange observed
10-02 18:58 40m - / -16 F5PBG -8 / - 4 ✓ Closing fragment
10-02 16:23 80m - / -14 DO2AY -10 / - 2 ✓ Closing fragment
10-02 16:19 80m - / -21 LA9GX 0 / - 2 ✓ Closing fragment
10-02 16:15 60m - / -12 SQ8GBG +6 / - 3 ✓ Closing fragment
10-02 16:11 60m - / -14 LY8O +2 / - 2 ✓ Closing fragment
10-01 21:15 60m -18 / - DF6WE - / - 2 Partial capture
10-01 21:12 60m -8 / - ON1AEY - / - 2 Partial capture
10-01 21:10 60m -8 / -3 G4AAV -8 / - 4 ✓ Closing observed
10-01 21:02 60m - / -7 OV5SP -20 / - 2 ✓ Closing fragment
10-01 21:02 60m -18 / - F6BBQ +1 / -6 2 Partial capture
10-01 21:00 60m -19 / -20 EA7JVC -18 / -2 3 ✓ Full exchange observed
10-01 20:57 60m -20 / - 4X5EF - / - 3 Partial capture
10-01 20:49 60m -21 / - 4X5EF - / - 3 Partial capture
10-01 20:38 60m -16 / -13 LZ9DX -15 / - 7 ✓ Closing observed
10-01 20:34 60m -16 / - F4BJN - / -2 2 Partial capture
10-01 20:33 60m - / -14 LA9CAA -14 / - 2 ✓ Closing fragment
10-01 20:26 60m -16 / -19 LZ9DX -16 / -12 14 ✓ Full exchange observed
10-01 20:18 80m -20 / - RA3SO - / - 2 Partial capture
10-01 19:41 80m - / -16 E75C +2 / - 2 ✓ Closing fragment
10-01 19:27 80m - / +2 DK7ZT +7 / - 5 Partial capture
10-01 19:05 80m - / -15 PA5COR -3 / - 4 ✓ Closing fragment
10-01 16:16 40m - / - PA8DC -2 / - 2 Partial capture
10-01 16:13 40m - / - 9A4ZM -1 / - 2 Partial capture
09-30 18:58 60m - / -17 LA6OCA -18 / - 3 ✓ Closing fragment
09-30 18:53 60m -15 / -14 EA5BM -6 / - 5 ✓ Closing observed
09-30 18:52 60m - / - DK1MBY -16 / - 2 Partial capture
09-30 18:45 60m -10 / -8 DK0ND +2 / -18 4 ✓ Full exchange observed
09-30 18:44 60m -7 / 0 4L7T -6 / -4 11 ✓ Full exchange observed
09-30 18:42 60m - / -6 PC2J -9 / - 4 ✓ Closing fragment
09-30 18:39 60m -17 / - SP3AVS - / -8 3 Partial capture
09-30 18:38 60m - / 0 OM1WZ -9 / - 5 Partial capture
09-30 18:36 60m -18 / -6 I3YPD -5 / -1 4 Partial capture
09-30 18:31 60m -18 / -20 GW4HZA 0 / - 4 ✓ Closing observed
09-30 18:25 60m -16 / - DL0ERZ -8 / -5 2 Partial capture
09-30 18:24 60m - / -11 DK0RPO -10 / - 3 ✓ Closing fragment
09-30 18:20 60m - / -8 SP3JHZ 0 / - 3 ✓ Closing fragment
09-30 18:15 60m -18 / -4 F5HNQ -5 / -6 7 ✓ Full exchange observed
09-30 18:12 60m - / -11 LZ1SAD +1 / - 6 ✓ Closing fragment
09-30 18:11 60m -18 / - F5HNQ -3 / -6 3 Partial capture
09-30 18:11 60m - / -6 HB9CZF -1 / - 2 ✓ Closing fragment
09-30 18:11 60m - / - IK3/UY7LA -4 / - 2 Partial capture
09-30 14:52 40m - / -15 OZ9FF -4 / - 2 ✓ Closing fragment
09-29 20:04 60m -14 / - E75C -16 / -12 3 ✓ Closing observed
09-29 19:58 60m -10 / -10 DF4LB -7 / -7 5 ✓ Full exchange observed
09-29 19:58 60m - / -9 PE1MHY -6 / - 3 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

60m 
UTC    dB Audio  Message
185215 -16 2549  4L7T ON4MHZ JN29
185500  +0 1386  ON4MHZ HA5UK -08
210030 -17 2326  4L7T ON4MHZ JN29 (x3)
210400 -23 1631  IU2VUZ ON4MHZ JN29 (x2)
210445 -24 1631  ON4MHZ IU2VUZ -16
210600 -24 1631  IU2VUZ ON4MHZ R-13
211100 -14 2445  OZ1NIB ON4MHZ R-01
211430 -11 2619  F4HDR ON4MHZ JN29 (x2)
211530  -7 2619  CQ ON4MHZ JN29 (x3)
80m 
UTC    dB Audio  Message
201800 -20 1806  RA3SO ON4MHZ JN29 (x2)
161930  +0 2063  ON4MHZ LA9GX -21 (x2)
162330 -11  720  ON4MHZ DO2AY -14 (x2)
203915 -11 1569  ON4MHZ DK7TX -17
203930 -22 1571  DK7TX ON4MHZ R-07
203945  -2 1569  ON4MHZ DK7TX RR73
204015  -5  506  ON4MHZ DO4DXA JN58
204030 -21 2140  YU1FI ON4MHZ JN29
204045  -5  506  ON4MHZ DO4DXA JN58 (x3)
204615  +7 2137  ON4MHZ OM3PR JN87
40m 
UTC    dB Audio  Message
045245  -9  680  ND3N ON4MHZ JN29
045515 -14 1496  KC2NJ ON4MHZ R-25
175945 -14 1364  CT3HU ON4MHZ JN29 (x2)
145215  -4 2316  ON4MHZ OZ9FF -15 (x2)
160515 -12 2480  ON4MHZ DJ1NE JN39
161345  -4  701  ON4MHZ 9A4ZM JN86 (x2)
161645  -2  704  ON4MHZ PA8DC JO21 (x2)
185815  -7 2077  ON4MHZ F5PBG IN78 (x4)

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