SV4YQ — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Greece Most frequent locator attributed to this token: KM19

Receiver-side FT8 activity involving SV4YQ, decoded by SO8OO in southeastern Poland. 504 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 58 UTC dates in the available aggregate history. Observed between 2026-06-11 and 2026-09-21.

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 504 FT8 messages attributed to SV4YQ as the transmitting token by decoded message structure across 58 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (54%), followed by 80 m (31%) and 10 m (9%). The busiest six-hour window was 00:00-06:00 UTC, containing 47% of decodes. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -12 dB.

Overview

504
Messages attributed
58
UTC dates decoded
135
Active 15-min windows
-12 dB
Estimated median S/N

Bands

80m · 154 40m · 273 20m · 30 10m · 47
First attributed message: 2026-06-11
Last attributed message: 2026-09-21 04:52 UTC

Observed FT8 message patterns

Attributed sample
504 messages
Active dates
58 UTC dates
Estimated median S/N
-12 dB
Estimated 10th-90th percentile
-20 to -3 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 144, moderate (-15 to -9 dB) 204, strong (≥ -8 dB) 156.

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 SV4YQ 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 SV4YQ

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
KM19 · 373 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,164 km (approx.)
Last such locator decoded
2026-09-21 04:52 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 UTCBandSV4YQ S/NCounterpartCounterpart S/NMsgsCapture
09-21 04:51 40m -11 / - W1AW/9 - / - 2 Partial capture
09-21 03:25 40m -9 / - W3L - / - 11 Partial capture
09-21 03:24 40m -8 / - II9IAGM - / - 2 Partial capture
09-21 03:19 40m -10 / - N9TF - / -15 7 ✓ Closing fragment
09-21 03:14 40m -9 / - XE1IHD - / - 4 Partial capture
09-20 19:31 80m - / -25 IQ0AAI -5 / - 3 ✓ Closing fragment
09-20 18:07 40m 0 / - TC2EYL -6 / +1 3 ✓ Closing observed
09-20 15:07 40m - / - IT9FEG -11 / - 4 Partial capture
09-20 14:58 40m -12 / - SP4WSL - / - 13 Partial capture
09-20 14:09 40m -8 / -2 SP9CXN +6 / -3 4 ✓ Full exchange observed
09-19 04:04 40m - / - RA6ALF -14 / - 2 Partial capture
09-19 04:01 40m -6 / -15 SN100PKP -17 / - 4 Partial capture
09-19 03:27 40m - / - CT2HEX -11 / - 4 Partial capture
09-19 03:27 40m - / - UR4QWW +2 / - 7 Partial capture
09-19 03:25 40m - / -14 SO100PKP -7 / - 2 Partial capture
09-18 18:36 40m -15 / - II9IAGM - / - 2 Partial capture
09-18 16:58 40m -4 / +7 SP9TEX +2 / -11 4 ✓ Full exchange observed
09-18 05:34 40m - / -10 IQ0AAI -6 / - 2 ✓ Closing fragment
09-18 05:14 40m -11 / - W3L - / -14 5 ✓ Closing fragment
09-18 04:57 40m -11 / - AM3MERCE - / -22 2 Partial capture
09-17 05:20 40m -11 / - IT9ECY - / +2 5 ✓ Closing fragment
09-16 18:37 80m -5 / -2 SP9CXN +4 / -10 5 ✓ Full exchange observed
09-16 06:30 40m -21 / - EH3ST - / -14 5 ✓ Closing fragment
09-12 01:40 40m -22 / - EH3ST - / -10 2 Partial capture
09-12 01:28 80m -6 / -6 II0CDS -12 / -10 6 ✓ Full exchange observed
09-12 00:59 80m -18 / -18 EH3ST -8 / - 5 Partial capture
09-11 04:48 40m - / - DK8HC -10 / - 5 Partial capture
09-10 18:24 40m -12 / - SP100PKP - / -14 3 Partial capture
09-10 16:04 40m -12 / -4 IQ2AAH -12 / -1 4 ✓ Full exchange observed
09-10 11:59 40m -19 / - IQ2AAH -17 / - 2 ✓ Closing observed
09-10 03:32 80m -3 / - IT9BYL - / - 3 Partial capture
09-09 05:39 40m - / - 9A3MA -3 / - 5 Partial capture
09-09 05:11 40m - / - 9A3MA -5 / - 41 Partial capture
09-05 08:20 40m -11 / - EG2DIA - / - 2 Partial capture
09-05 04:11 80m -24 / - II0CDS - / - 2 Partial capture
09-05 03:55 80m -16 / - II0CDS - / - 5 Partial capture
09-04 12:43 40m - / -19 SP7VCL -5 / - 3 ✓ Closing fragment
09-04 05:18 40m -16 / - EG1PPE - / -13 7 Partial capture
09-04 02:38 40m -9 / -2 EG42SDC -7 / - 6 Partial capture
09-04 02:35 40m -6 / - <...> - / - 5 Partial capture
09-03 15:34 40m -14 / +2 IK2BUF -14 / - 3 ✓ Closing observed
09-03 04:14 40m -17 / - IT9ECY - / -24 3 Partial capture
09-02 03:39 80m -13 / - <...> - / - 3 Partial capture
09-02 03:18 40m -6 / - 3Z100PKP - / -15 3 Partial capture
09-02 03:06 80m -7 / -11 SO100PKP +4 / -11 6 Partial capture
09-01 17:53 40m 0 / - EG1PDA - / - 4 Partial capture
09-01 15:49 40m - / -6 3Z100PKP +8 / - 2 Partial capture
09-01 05:28 40m - / - 9A3MA -8 / - 29 Partial capture
09-01 03:06 40m -11 / - <...> - / -13 6 Partial capture
09-01 02:58 80m -16 / -8 <...> +12 / -3 3 Partial capture

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
032400  -7  978  II9IAGM SV4YQ KM19 (x2)
032500 -11 1814  W3L SV4YQ KM19 (x11)
045130 -13 1172  W1AW/9 SV4YQ KM19 (x2)
80m 
UTC    dB Audio  Message
012845  -6  926  II0CDS SV4YQ KM19
012900 -12  925  SV4YQ II0CDS -06
012915  -7  926  II0CDS SV4YQ R-10
012930 -13  926  SV4YQ II0CDS RR73
012945  -6  926  II0CDS SV4YQ 73
184415 -21 1746  EH3ST SV4YQ R+08
183730  -5 1366  SP9CXN SV4YQ KM19
183745 +11 1366  SV4YQ SP9CXN -02
183800  -5 1366  SP9CXN SV4YQ R-10
183815  -2 1366  SV4YQ SP9CXN RR73
183830  -4 1366  SP9CXN SV4YQ 73
192915 -24 1352  IQ0AAI SV4YQ KM19
193130  -3 1350  SV4YQ IQ0AAI -25 (x3)
20m 
UTC    dB Audio  Message
004700 -24 1134  II7MGBR SV4YQ KM19
004815  +3  840  SV4YQ II7MGBR -07
004830 -19  998  <...> SV4YQ R-08
010900  -1 2104  SV4YQ II7MGBT +04
115300 -16  824  SV4YQ II7MGFG +08
123345 -22 2066  <...> SV4YQ KM19
123415 -24 2067  <IR7MGGC> SV4YQ KM19
124100  +0 1756  SV4YQ IR7MGGC -22 (x3)
125600  -5 2217  SV4YQ IU5HIU JN53
125600 -15 2074  SV4YQ IR7MGGC +01
093145 -24 2164  SV4YQ PA0ARR +04 (x2)
163430 -18  994  SV4YQ IZ2CDP -10
10m 
UTC    dB Audio  Message
093615 -10  849  <...> SV4YQ KM19 (x9)
122630 -10  971  EA1GAR SV4YQ KM19 (x3)
113430 -20 2007  <...> SV4YQ KM19 (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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