SP4KDK — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Poland Most frequent locator attributed to this token: JO93

Receiver-side FT8 activity involving SP4KDK, decoded by SO8OO in southeastern Poland. 62 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 5 UTC dates in the available aggregate history. Observed between 2026-09-12 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 62 FT8 messages attributed to SP4KDK as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (68%), followed by 80 m (32%). Several six-hour UTC windows tied for the largest share (63%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (89%); the estimated median was +3 dB.

Overview

62
Messages attributed
5
UTC dates decoded
9
Active 15-min windows
+3 dB
Estimated median S/N

Bands

80m · 20 40m · 42
First attributed message: 2026-09-12
Last attributed message: 2026-09-19 19:02 UTC

Observed FT8 message patterns

Attributed sample
62 messages
Active dates
5 UTC dates
Estimated median S/N
+3 dB
Estimated 10th-90th percentile
-12 to +8 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 2, moderate (-15 to -9 dB) 5, strong (≥ -8 dB) 55.

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 SP4KDK 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 SP4KDK

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
JO93 · 53 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
440 km (approx.)
Last such locator decoded
2026-09-19 19:02 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 UTCBandSP4KDK S/NCounterpartCounterpart S/NMsgsCapture
09-19 18:56 40m +5 / - SY5DVK - / - 13 Partial capture
09-19 18:53 40m - / - 9A4ZM +6 / - 2 Partial capture
09-19 18:53 40m - / - F5PBG -4 / - 2 Partial capture
09-19 18:52 40m - / -3 IU2VUZ -11 / - 9 Partial capture
09-19 18:52 40m +5 / -11 YO4GIY 0 / -7 5 ✓ Full exchange observed
09-19 18:50 40m +5 / - YO3FVR - / - 3 Partial capture
09-19 18:49 40m +8 / - PD1SL - / - 2 Partial capture
09-19 18:48 40m +7 / - IU2VUZ - / - 2 Partial capture
09-19 18:48 40m - / +1 DK7ZT 0 / - 2 Partial capture
09-19 18:46 40m +8 / -2 G8KHF -4 / +3 5 ✓ Full exchange observed
09-19 18:45 40m +6 / - PD4RJ - / - 3 Partial capture
09-19 18:42 40m - / -10 HZ1TT -7 / - 2 Partial capture
09-17 22:22 40m - / -9 DK7ZT -20 / - 2 Partial capture
09-17 22:20 40m - / -9 F4IVG -14 / - 2 Partial capture
09-17 21:54 40m - / -7 A61DD -8 / - 5 ✓ Closing fragment
09-17 21:43 40m - / -8 HZ1TT -8 / - 2 ✓ Closing fragment
09-17 05:02 40m - / - UA4FKT -2 / - 3 Partial capture
09-17 05:00 40m -5 / -11 OO0O -12 / -5 9 ✓ Full exchange observed
09-17 04:56 40m +2 / -7 MI0OBC -4 / - 7 Partial capture
09-17 04:49 40m - / - PE1NPS -18 / - 2 Partial capture
09-17 04:44 40m - / -5 SV1DKR -9 / - 3 ✓ Closing fragment
09-17 04:43 40m - / -11 IK4TVP -10 / - 2 Partial capture
09-17 04:42 40m - / +4 YO6LM 0 / - 2 ✓ Closing fragment
09-16 22:36 80m +5 / - 5B4AMM - / - 4 Partial capture
09-16 22:07 40m - / -10 HB9ELE 0 / - 3 Partial capture
09-13 21:19 80m - / -8 II8IHBC +8 / - 2 Partial capture
09-13 21:15 80m 0 / - R0QBB/3 - / - 6 Partial capture
09-13 06:00 40m -4 / - RA3GFO - / - 4 Partial capture
09-12 04:28 80m -13 / -4 MI0NWA -13 / - 12 Partial capture
09-12 04:26 80m -8 / - EA3HMM - / - 3 Partial capture
09-11 05:23 40m - / - UR9QQ -12 / - 2 Partial capture
09-11 05:22 40m - / +1 DK7ZT -2 / - 3 Partial capture
09-11 05:20 40m - / - F5RRS -4 / - 4 Partial capture

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
185630  -8 2935  SP4KDK IU2VUZ -03
185700  +8  577  SY5DVK SP4KDK JO93 (x3)
185800  -6 2934  SP4KDK IU2VUZ -03
185830  +6  577  SY5DVK SP4KDK JO93
185830 -14 2935  SP4KDK IU2VUZ -03
185900  +6  577  SY5DVK SP4KDK JO93 (x7)
205815  +7  308  SP4KDK DJ0MAB JN49
80m 
UTC    dB Audio  Message
043030 -15  610  SP4KDK MI0NWA -04
043100 -15 2005  MI0NWA SP4KDK JO93 (x2)
211545  -2 2003  R0QBB/3 SP4KDK JO93 (x5)
211930  +8 2455  SP4KDK II8IHBC -08
211945  +0 2003  R0QBB/3 SP4KDK JO93
212000  +7 2455  SP4KDK II8IHBC -07
223645 +12 2411  5B4AMM SP4KDK JO93 (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.

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