ON4CVL — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Belgium Most frequent locator attributed to this token: JO10

Receiver-side FT8 activity involving ON4CVL, decoded by SO8OO in southeastern Poland. 264 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 43 UTC dates in the available aggregate history. Observed between 2026-06-12 and 2026-10-14.

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 264 FT8 messages attributed to ON4CVL as the transmitting token by decoded message structure across 43 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (45%), followed by 80 m (41%) and 40 m (12%). The busiest six-hour window was 02:00-08:00 UTC, containing 45% of decodes. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -13 dB.

Overview

264
Messages attributed
43
UTC dates decoded
77
Active 15-min windows
-13 dB
Estimated median S/N

Bands

80m · 107 40m · 32 20m · 119 10m · 6
First attributed message: 2026-06-12
Last attributed message: 2026-10-14 16:51 UTC

Observed FT8 message patterns

Attributed sample
264 messages
Active dates
43 UTC dates
Estimated median S/N
-13 dB
Estimated 10th-90th percentile
-23 to 0 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 100, moderate (-15 to -9 dB) 75, strong (≥ -8 dB) 89.

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 ON4CVL 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 ON4CVL

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
JO10 · 113 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,335 km (approx.)
Last such locator decoded
2026-10-14 16:18 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 UTCBandON4CVL S/NCounterpartCounterpart S/NMsgsCapture
10-14 16:50 40m -14 / - F4HSB - / -4 2 ✓ Closing fragment
10-14 16:18 40m -14 / -7 F1DOA -11 / - 2 Partial capture
10-13 15:57 40m -22 / - OH7ML - / - 5 Partial capture
10-13 14:51 40m - / 0 PA1GUZ -7 / - 2 ✓ Closing fragment
10-03 03:09 40m -16 / - K2TTA - / -18 5 ✓ Closing fragment
10-03 03:00 80m - / -17 R3ICU -6 / - 3 Partial capture
10-03 02:47 80m - / - DK8HC +4 / - 5 Partial capture
10-03 02:47 80m -14 / -12 R3ICU -3 / -20 15 Partial capture
10-03 02:45 80m -18 / -18 SX2LGT -7 / -5 7 ✓ Full exchange observed
10-01 19:03 80m - / - SP5DFK -6 / - 2 Partial capture
10-01 19:00 80m -12 / - ON7KEI -10 / - 2 ✓ Closing observed
10-01 18:36 80m -14 / - YT2ZE - / - 2 Partial capture
10-01 18:34 80m -8 / -17 OE6GBG -1 / -13 5 ✓ Full exchange observed
10-01 18:33 80m -16 / -16 CT7AUT -20 / -17 4 ✓ Full exchange observed
10-01 18:29 80m -6 / - DO6MFD -13 / +2 3 ✓ Closing observed
09-30 05:20 80m -24 / - DO7TTR - / -7 2 ✓ Closing fragment
09-23 19:11 40m - / -5 SM7TZK -8 / - 2 ✓ Closing fragment
09-17 20:10 80m -13 / -8 II8IHBC -6 / -13 2 Partial capture
09-17 20:07 80m -18 / 0 DO1JMA -24 / -15 5 ✓ Full exchange observed
09-17 20:04 80m -15 / - DO1RWM -17 / 0 4 ✓ Closing observed
09-17 19:56 80m -16 / - G0TSM/P - / -18 2 Partial capture
09-17 19:47 80m +4 / +9 PA0RDT -24 / -6 2 Partial capture
09-17 19:38 80m -14 / - SO100PKP - / - 2 Partial capture
09-17 19:38 80m - / -10 DF7NO +2 / - 8 ✓ Closing fragment
09-17 19:36 80m -17 / -10 EH3ST -17 / -2 3 Partial capture
09-09 19:18 80m - / -5 HB9DGZ +4 / - 2 Partial capture
09-09 19:14 80m -14 / -1 SN40KZE +5 / +5 3 Partial capture
09-09 19:11 80m -13 / -4 IN3WZS -4 / -12 6 ✓ Full exchange observed
09-09 19:10 80m - / -3 OZ1GC -6 / - 2 ✓ Closing fragment
09-09 19:07 80m -13 / - OZ7CL - / -15 3 ✓ Closing fragment
09-09 19:05 80m -10 / -1 SQ100PKP +15 / +2 3 Partial capture
09-04 17:47 40m -12 / - EA3ACQ - / - 4 Partial capture
09-04 17:37 40m - / -4 DG0OFT 0 / - 2 ✓ Closing fragment
09-04 17:34 40m -18 / - EG3PDA - / -15 2 Partial capture
09-04 06:52 40m - / -13 DB3EH -12 / - 2 ✓ Closing fragment
09-03 09:12 40m - / -1 PD9DX -16 / - 2 ✓ Closing fragment
09-03 08:54 40m - / -6 DL6YJB -13 / - 2 ✓ Closing fragment
09-03 07:41 40m - / - GU0SUP -12 / - 2 Partial capture
09-03 07:40 40m - / -9 DK5UR -7 / - 2 ✓ Closing fragment
09-03 07:33 40m - / 0 PI4IPA -20 / - 2 ✓ Closing fragment
09-03 07:20 40m - / -2 3Z100PKP +6 / - 2 Partial capture
09-03 07:17 40m - / -16 OE2VDL -4 / - 4 ✓ Closing fragment
09-03 07:11 40m - / -6 HB9TWU -18 / - 2 ✓ Closing fragment
09-02 07:09 40m - / -11 DL9KM -2 / - 4 ✓ Closing fragment
09-01 11:30 40m - / 0 DM1MT -17 / - 2 Partial capture
08-31 15:01 20m +6 / - EA5KAI - / -7 3 ✓ Closing fragment
08-31 14:58 20m +8 / - EA7R -3 / -1 5 ✓ Closing observed
08-30 12:16 40m - / - DA0RR -16 / - 2 ✓ Closing fragment
08-30 10:59 20m -6 / - EA4ILV - / - 2 Partial capture
08-30 07:40 20m +9 / -8 YO3RU +3 / +4 5 ✓ Full exchange observed

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
031115 -18 1279  K2TTA ON4CVL 73
041200 -12 2076  KE2KE ON4CVL JO10
144830 -18 2475  ON4CVL M1DBB RR73
145130  -7 1478  ON4CVL PA1GUZ +00 (x2)
155730 -19 1740  OH7ML ON4CVL JO10 (x5)
161815 -14 2279  F1DOA ON4CVL JO10
161830 -11 2280  ON4CVL F1DOA -07
163600 -12 1521  M8MFU ON4CVL RR73
165030 -13 1464  F4HSB ON4CVL R-04 (x2)
80m 
UTC    dB Audio  Message
024900  +4 1315  ON4CVL R3ICU R-12
024900  +6  565  ON4CVL DK8HC JO42
024915 -11 1856  R3ICU ON4CVL -20
024930  +4 1315  ON4CVL R3ICU R-14
024945 -17 1856  R3ICU ON4CVL -20
025000  +0 1315  ON4CVL R3ICU R-15
025045 -12 1856  R3ICU ON4CVL -20 (x3)
025330  -8 1315  ON4CVL R3ICU R-17 (x6)
20m 
UTC    dB Audio  Message
074015  +9 2400  YO3RU ON4CVL JO10
074030  +5 2399  ON4CVL YO3RU -08
074045  +8 2400  YO3RU ON4CVL R+04
074100  +1 2398  ON4CVL YO3RU RR73
074115  +9 2393  YO3RU ON4CVL 73
105900  -4 1894  EA4ILV ON4CVL JO10 (x2)
145845 +12 2443  EA7R ON4CVL JO10 (x3)
150030  -3 2443  ON4CVL EA7R RR73
150045  +6 2446  EA7R ON4CVL 73
150145  +7 1370  EA5KAI ON4CVL JO10 (x3)
10m 
UTC    dB Audio  Message
095630 -20 1557  EA5JGR ON4CVL 73
145300 -17 2228  ON4CVL 7Q6UJ +07 (x2)
175215 -19 1702  ON4CVL IU5TUG +02
184145  -8  968  ON4CVL CT3MD IM13 (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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