SP4TKR — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Poland Most frequent locator attributed to this token: KO04

Receiver-side FT8 activity involving SP4TKR, decoded by SO8OO in southeastern Poland. 36 FT8 messages attributed to this token as transmitter, on 80m, 20m, across 2 UTC dates in the available aggregate history. Observed between 2026-06-29 and 2026-07-24.

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 36 FT8 messages attributed to SP4TKR as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (69%), followed by 80 m (31%). In this small sample, the estimated median decoder S/N was 0 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

0 dB

Estimated median S/N

Bands

80m · 11 20m · 25

First attributed message: 2026-06-29
Last attributed message: 2026-07-24 20:04 UTC

Observed FT8 message patterns

Attributed sample: 36 messages
Active dates: 2 UTC dates
Estimated median S/N: 0 dB
Estimated 10th-90th percentile: -6 to +4 dB
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 0, strong (≥ -8 dB) 36.

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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with SP4TKR in decoded directed-looking exchanges:

CE2SV · Chile F6BNX · France IT9ACJ · Sicily BA3QIQ · China DL9FFM · Fed. Rep. of Germany EA8AT · Canary Islands ON1JP · Belgium PD0HLA · Netherlands UA4FEN · European Russia PA3T · Netherlands SQ2TAC · Poland

Most frequent locator attributed to SP4TKR

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: KO04 · 14 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 510 km (approx.)
Last such locator decoded: 2026-07-24 20:04 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 UTC	Band	SP4TKR S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-10 19:51	10m	- / -14	CE2SV	-10 / -	2	✓ Closing fragment
08-09 12:48	10m	- / +1	F6BNX	-20 / -	2	✓ Closing fragment
08-09 10:08	10m	- / -4	RN6MA	-16 / -	2	Partial capture
07-24 20:03	80m	+6 / -	IK5FKF	- / -	3	Partial capture
07-24 19:31	80m	-7 / +9	DB100FT	-8 / +9	3	Partial capture
07-24 19:16	80m	-4 / -	SQ2TAC	- / +3	3	✓ Closing fragment
07-24 19:14	80m	-2 / -16	PA3T	-15 / -7	5	✓ Full exchange observed
06-29 17:16	20m	0 / -	DL9FFM	- / -1	2	✓ Closing fragment
06-29 17:12	20m	0 / -	KC2NJ	- / -17	2	Partial capture
06-29 17:11	20m	-1 / -	ON1JP	- / -5	2	✓ Closing fragment
06-29 17:08	20m	+2 / -	PD0HLA	- / -5	2	✓ Closing fragment
06-29 17:07	20m	+2 / +7	EA8AT	-19 / -7	5	✓ Full exchange observed
06-29 17:04	20m	+3 / -	BA3QIQ	- / -16	3	✓ Closing fragment
06-29 17:03	20m	-2 / -	UA4FEN	- / -	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

10m

UTC    dB Audio  Message
100830 -14 2132  SP4TKR RN6MA -04 (x2)
103745 -22 1518  SP4TKR IT9ACJ RR73
124815 -20 1263  SP4TKR F6BNX +01 (x2)
152345 -18 1983  SP4TKR RN6MA +17
195100 -10 2601  SP4TKR CE2SV -14 (x2)

80m

UTC    dB Audio  Message
191445  -5 1760  PA3T SP4TKR KO04
191500 -16 1761  SP4TKR PA3T -16
191515  -3 1760  PA3T SP4TKR R-07
191530 -14 1761  SP4TKR PA3T RR73
191545  +1 1761  PA3T SP4TKR 73
191645  -3 1355  SQ2TAC SP4TKR KO04 (x3)
193130  -8 1458  DB100FT SP4TKR KO04
193145  -8 1458  SP4TKR DB100FT +09
193200  -6 1458  DB100FT SP4TKR R+09
200330  +6  443  IK5FKF SP4TKR KO04 (x3)

20m

UTC    dB Audio  Message
170845  +2 2130  PD0HLA SP4TKR R-05 (x2)
170945  +1 2130  CQ SP4TKR KO04 (x3)
171145  +0 2132  ON1JP SP4TKR R-05 (x2)
171245  -1 2133  KC2NJ SP4TKR R-17
171315  +2 2133  RZ4FWA SP4TKR -10
171345  +2 2134  CQ SP4TKR KO04
171415  +2 2134  KC2NJ SP4TKR R-20
171445  +2 2135  CQ SP4TKR KO04
171545  +1 2135  CT2KCK SP4TKR -17
171615  -1 2136  DL9FFM SP4TKR -01 (x2)

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