SP9CXN — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Poland Most frequent locator attributed to this token: JO90

Receiver-side FT8 activity involving SP9CXN, decoded by SO8OO in southeastern Poland. 3,172 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, across 44 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-09-20.

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 3,172 FT8 messages attributed to SP9CXN as the transmitting token by decoded message structure across 44 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (57%), followed by 80 m (39%) and 60 m (4%). Most decodes (68%) fell within the six-hour window 14:00-20:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (82%); the estimated median was +4 dB.

Overview

3,172

Messages attributed

UTC dates decoded

209

Active 15-min windows

+4 dB

Estimated median S/N

Bands

80m · 1,235 60m · 141 40m · 1,796

First attributed message: 2026-06-07
Last attributed message: 2026-09-20 10:31 UTC

Observed FT8 message patterns

Attributed sample: 3,172 messages
Active dates: 44 UTC dates
Estimated median S/N: +4 dB
Estimated 10th-90th percentile: -13.4 to +14 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 212, moderate (-15 to -9 dB) 360, strong (≥ -8 dB) 2,600.

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 SP9CXN in decoded directed-looking exchanges:

SP9XG · Poland ×11 DL3AWB · Fed. Rep. of Germany ×10 SP6ZWD · Poland ×9 SP1DL · Poland ×8 SP7CWZ · Poland ×8 SP7SZJ · Poland ×8 SO5A · Poland ×7 SP7PGK · Poland ×7 SP7VLU · Poland ×7 SQ5TA · Poland ×7 YO5OSF · Romania ×7 SQ8CTR · Poland ×7

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 SP9CXN

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: JO90 · 1,531 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 208 km (approx.)
Last such locator decoded: 2026-09-20 10:31 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	SP9CXN S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-20 10:30	40m	+4 / -	DF2JK	- / -	3	Partial capture
09-20 10:27	40m	+2 / -	9A5MP	- / -17	4	Partial capture
09-20 09:22	40m	+6 / +5	HA1ZW	-2 / -	4	✓ Full exchange observed
09-20 09:16	40m	+4 / -	HA1ZW	- / -	2	Partial capture
09-20 09:10	40m	+5 / -	DL7ARV	-5 / -	5	✓ Full exchange observed
09-20 09:06	40m	+2 / +9	OM3CND	+10 / -	4	✓ Closing observed
09-20 09:05	40m	+4 / -12	SQ5TA	+12 / -	4	✓ Closing observed
09-20 09:03	40m	- / -15	SP4GDW	-20 / -	4	✓ Closing fragment
09-20 09:03	40m	+9 / -	DB7QE	-14 / +4	2	✓ Closing observed
09-20 09:00	40m	+5 / -11	US1MM	+3 / -	5	✓ Full exchange observed
09-20 08:59	40m	+8 / +4	SP6SPK	-2 / +9	4	✓ Full exchange observed
09-20 08:55	40m	+5 / -2	SP1DL	-10 / +9	5	✓ Full exchange observed
09-20 08:54	40m	+8 / -	SP2BT	- / -13	2	✓ Closing fragment
09-20 08:53	40m	+8 / +7	SP4CGJ	-15 / +9	5	✓ Full exchange observed
09-20 08:50	40m	+2 / -	SP4DIS	-8 / +2	6	✓ Closing observed
09-20 08:50	40m	+2 / -	SQ3BKI	+2 / -	5	✓ Full exchange observed
09-20 08:48	40m	- / -	SQ5MZM	+7 / -	2	Partial capture
09-17 16:43	40m	+8 / -3	DG4LXM	-8 / +6	5	✓ Full exchange observed
09-17 16:42	40m	+10 / -	S55X	- / -12	3	✓ Closing fragment
09-17 16:39	40m	+10 / -	S56LKP	- / +3	3	✓ Closing fragment
09-17 16:38	40m	+7 / -	IN3JRZ	- / +2	3	Partial capture
09-17 16:37	40m	+9 / -	HB9OAU	- / -5	3	✓ Closing fragment
09-17 16:36	40m	+8 / -5	G4DZE	-10 / -9	4	✓ Full exchange observed
09-17 16:32	40m	+7 / -4	9A3MRN	-3 / +8	5	✓ Full exchange observed
09-17 16:30	40m	+2 / -14	G0RVY	-3 / -3	4	✓ Full exchange observed
09-17 16:28	40m	+3 / -	YO2IS	- / +5	3	✓ Closing fragment
09-17 16:27	40m	0 / -	HA8RC	- / -	2	Partial capture
09-17 16:26	40m	+2 / -	IW2MLJ	- / -	2	Partial capture
09-17 16:24	40m	+5 / -	EA1DR	- / -15	3	✓ Closing fragment
09-17 16:20	40m	+9 / +9	E77WM	-8 / 0	5	✓ Full exchange observed
09-17 16:17	40m	+12 / -14	DH9ET	-14 / -10	5	✓ Full exchange observed
09-17 16:14	40m	+7 / -	HG0NPJ	- / -3	3	✓ Closing fragment
09-17 16:12	40m	+4 / -	IW2MLJ	- / -	2	Partial capture
09-17 16:10	40m	+6 / -	SM2OTU	- / -18	2	✓ Closing fragment
09-17 16:08	40m	+4 / -	M7NRS	- / -21	2	✓ Closing fragment
09-17 16:05	40m	- / -12	SQ9BC	+6 / -	2	✓ Closing fragment
09-17 16:02	40m	+8 / -	OH3DJP	- / -	2	Partial capture
09-17 16:01	40m	+5 / -1	SP9KKA	+3 / +3	4	✓ Full exchange observed
09-17 15:54	40m	+6 / +1	SO5A	-3 / -	5	✓ Full exchange observed
09-17 15:53	40m	-1 / -21	F1DSZ	-2 / -	4	✓ Closing observed
09-17 15:53	40m	- / -9	RA4FEQ	+4 / -	3	Partial capture
09-17 15:52	40m	+2 / -	PD0MNO	- / -5	2	✓ Closing fragment
09-17 15:51	40m	- / -15	UA4FEN	-10 / -	4	Partial capture
09-17 15:50	40m	-2 / -	9A6NCC	-10 / -5	3	✓ Closing observed
09-16 19:00	80m	+6 / -	IZ6ERS	- / +9	2	Partial capture
09-16 18:58	80m	+5 / -14	M6XZD	-6 / -	3	✓ Closing observed
09-16 18:55	80m	+4 / -	EH3ST	- / -8	4	✓ Closing fragment
09-16 18:53	80m	+2 / -	R4HLO	-24 / -16	5	Partial capture
09-16 18:50	80m	+12 / -17	SP2BT	-14 / -22	7	✓ Full exchange observed
09-16 18:49	80m	+5 / -	SV4FGT	- / -13	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
092300  +7 1770  HA1ZW SP9CXN +20
092315  -2 1524  SP9CXN HA1ZW R+05
092330  +4 1770  HA1ZW SP9CXN RR73
092400  +5 1770  CQ SES SP9CXN JO90 (x5)
102715  +3 1135  9A5MP SP9CXN JO90 (x4)
103000 +10 2483  DF2JK SP9CXN JO90 (x3)

80m

UTC    dB Audio  Message
185330 -24 1367  SP9CXN R4HLO LO43
185345  +3 1366  R4HLO SP9CXN -16 (x4)
185545  -1 1366  EH3ST SP9CXN JO90 (x4)
185800 -10  509  SP9CXN M6XZD R-14
185815  +5 2318  M6XZD SP9CXN RR73
185830  -3  509  SP9CXN M6XZD 73
190045  +6 2740  IZ6ERS SP9CXN +09 (x2)
190230 +22 2740  HB9EFK SP9CXN -03

60m

UTC    dB Audio  Message
193615  +8 1060  F4LZZ SP9CXN -08 (x2)
193715  +9 1060  CQ SES SP9CXN JO90 (x3)
193830  +3 1060  SP9CXN SQ4WMA KO14
193845 +11 1060  SQ4WMA SP9CXN +09
193900  +1 1060  SP9CXN SQ4WMA R+19
193915  +8 1060  SQ4WMA SP9CXN RR73
193930  +5 1060  SP9CXN SQ4WMA 73
193945 +11 1060  CQ SES SP9CXN JO90
194015  +9 1060  OZ/DG4BRT SP9CXN -03
194115  +6 1060  CQ SES SP9CXN JO90 (x3)

10m

UTC    dB Audio  Message
114815  -7 2704  SP9CXN EA3AKY +04 (x3)
115245 -13  852  SP9CXN F4FKT RR73

20m

UTC    dB Audio  Message
151400  -5 2828  SP9CXN F1PBZ RR73
151430 -13 2067  SP9CXN RZ4FWA LO23
120915  -7  643  SP9CXN PE9JAN R+02 (x2)
125215 -15 1408  SP9CXN YO5PHL KN16 (x2)
125315 -24 1718  SP9CXN F4HSB JN37
125345  -5 1788  SP9CXN DL9KM JN68 (x3)
125615 -15 1488  SP9CXN 9A4DK JN85 (x3)
165400 -15  938  SP9CXN JA6VQA R-11 (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.

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