ON4VMA — reception at SO8OO

Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.

FT8 activity

DXCC entity inferred from callsign: Belgium Most frequent locator attributed to this token: JO11

Receiver-side FT8 activity involving ON4VMA, decoded by SO8OO in southeastern Poland. 910 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, 10m, across 29 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-10-20.

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 910 FT8 messages attributed to ON4VMA as the transmitting token by decoded message structure across 29 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (49%), followed by 80 m (36%) and 20 m (14%). Most decodes (54%) fell within the six-hour window 22:00-04:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (61%); the estimated median was -6 dB.

Overview

910
Messages attributed
29
UTC dates decoded
109
Active 15-min windows
-6 dB
Estimated median S/N

Bands

160m · 5 80m · 326 40m · 443 20m · 131 10m · 5
First attributed message: 2026-06-06
Last attributed message: 2026-10-20 12:33 UTC

Observed FT8 message patterns

Attributed sample
910 messages
Active dates
29 UTC dates
Estimated median S/N
-6 dB
Estimated 10th-90th percentile
-18 to +5 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 136, moderate (-15 to -9 dB) 220, strong (≥ -8 dB) 554.

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 ON4VMA 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 ON4VMA

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
JO11 · 470 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,331 km (approx.)
Last such locator decoded
2026-10-20 12:33 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 UTCBandON4VMA S/NCounterpartCounterpart S/NMsgsCapture
10-20 12:26 40m - / -15 S51PV -13 / - 9 Partial capture
10-15 17:06 40m -7 / - ON6CQ - / - 6 Partial capture
10-14 02:44 40m +6 / - WD4OBP - / -8 3 ✓ Closing fragment
10-12 20:44 80m - / - IU2THY +12 / - 3 Partial capture
10-08 14:13 40m -15 / - IU2BZV - / - 2 Partial capture
10-08 14:09 40m -15 / +7 DG9ZL -13 / - 5 ✓ Closing observed
10-08 14:09 40m -14 / - DK4RH -16 / +1 3 ✓ Closing observed
10-08 14:05 40m -16 / - M9PMB - / -2 2 Partial capture
10-08 14:04 40m - / - DA0M -10 / - 2 Partial capture
10-08 14:01 40m -20 / - DH5IS -16 / -2 5 ✓ Closing observed
10-08 13:59 40m -16 / - PI4IPA -24 / +4 4 ✓ Closing observed
10-08 13:58 40m -16 / - MM3JFM - / -13 2 ✓ Closing fragment
10-08 13:53 40m -16 / - M6INJ - / -7 2 ✓ Closing fragment
10-08 13:53 40m -14 / -13 YO9PH +3 / -1 4 ✓ Full exchange observed
10-06 06:20 40m -7 / -6 F6FDY -3 / - 4 ✓ Closing observed
10-06 06:12 40m - / -16 YO4NT +2 / - 2 ✓ Closing fragment
10-06 06:11 40m - / - F8BII -10 / - 2 Partial capture
10-06 06:05 40m -12 / - SQ8AA - / - 2 Partial capture
10-01 02:39 40m +9 / - R5DT +3 / +1 6 Partial capture
10-01 02:36 40m -9 / -16 EA3AKY -3 / - 5 ✓ Closing observed
09-11 06:16 40m -6 / -12 SP4MPH -5 / -8 5 ✓ Full exchange observed
09-11 06:14 40m -18 / - SQ8ECJ - / -18 2 ✓ Closing fragment
09-11 06:11 40m -12 / -3 F4AWT -22 / - 2 ✓ Closing observed
09-01 07:44 40m -17 / - HB9ITZ - / - 2 Partial capture
09-01 03:22 40m -10 / - LY2EW - / -8 2 ✓ Closing fragment
09-01 03:11 40m -8 / -11 UA4FKT -4 / 0 5 ✓ Full exchange observed
08-29 22:37 40m -3 / - NP4EI - / - 2 Partial capture
08-29 22:34 40m -1 / - EA3ISZ - / -7 3 ✓ Closing fragment
08-29 22:32 40m +3 / - EA8CZ - / -12 3 ✓ Closing fragment
08-27 21:21 40m - / - DL1EDR +5 / - 3 Partial capture
08-27 21:20 40m - / - ON5LC -6 / - 6 Partial capture
08-27 21:19 40m - / - F1TXI +5 / - 2 Partial capture
08-27 21:16 40m - / - M0EGG -8 / - 2 Partial capture
08-21 06:56 40m -13 / -18 SP6AMI +9 / -15 5 Partial capture
08-21 06:47 40m -13 / - F5MXH - / 0 2 ✓ Closing fragment
08-21 06:43 40m -12 / - EA2EED - / -11 3 Partial capture
08-21 06:24 40m -20 / - RD3FY - / -18 2 Partial capture
08-21 06:21 40m - / - SQ7NHR +5 / - 3 Partial capture
08-21 06:19 40m -20 / - K4YT - / -8 2 ✓ Closing fragment
08-21 06:18 40m -20 / - GM7GAX - / -15 2 ✓ Closing fragment
08-21 06:16 40m -21 / - F5SJC - / +2 2 ✓ Closing fragment
08-21 06:15 40m -20 / - N4MMR - / -13 2 ✓ Closing fragment
08-21 06:14 40m -20 / - W4GGJ - / -11 2 ✓ Closing fragment
08-21 06:12 40m -19 / -7 DL1HQN -14 / -9 3 ✓ Full exchange observed
08-21 06:11 40m - / -7 RN1TV -10 / - 2 ✓ Closing fragment
08-18 12:04 20m - / -15 EB3JT -10 / - 3 ✓ Closing fragment
08-17 13:09 20m - / -14 ON4ASV +10 / - 3 ✓ Closing fragment
08-17 12:18 20m - / - ON4ASV +4 / - 3 Partial capture
08-09 19:51 40m - / -7 PA1MOS -14 / - 3 Partial capture
08-09 19:44 40m -22 / - DL3JHK -16 / - 2 ✓ Closing observed

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
170830  -5 1818  ON6CQ ON4VMA JO11 (x2)
171430  -6 1422  ON3ZEP ON4VMA R-08
122630 -12  720  CQ ON4VMA JO11
122645 -14 2288  ON4VMA S51PV JN76
122730 -21 1268  HB9ZHK ON4VMA RR73
122815 -14 2286  ON4VMA S51PV JN76 (x8)
123300 -20 1210  CQ ON4VMA JO11
80m 
UTC    dB Audio  Message
195245 -15  854  ON4VMA DA6HU 73
195345 -17 1526  ON4VMA HB3YOY JN37
195345 -13  533  ON4VMA DO1LFJ JN58
195415 -18 1526  ON4VMA HB3YOY JN37
195415  -9  533  ON4VMA DO1LFJ R-19
195415 -10 2364  ON4VMA DM8ET -12
195445  -6  532  ON4VMA DO1LFJ R-19
195445 -15 2364  ON4VMA DM8ET -12 (x4)
195815  -6  533  ON4VMA DO1DMR JO40
204430 +11 2716  ON4VMA IU2THY JN45 (x3)
10m 
UTC    dB Audio  Message
134845 -21 1473  ON4VMA IN3ADG -03
20m 
UTC    dB Audio  Message
082645  +0  811  ON4VMA DL6ZOG 73
083245  -6  811  ON4VMA EB3JT JN01 (x3)
121845  +3 1976  ON4VMA ON4ASV JO11 (x6)
131245  -6 2689  ON4VMA F6BHK JN24
120415  -7 2005  ON4VMA EB3JT JN01 (x3)
120615 -15 1675  ON4VMA DL1UDO JO31

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.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee