SP4AB — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Poland Most frequent locator attributed to this token: KO03

Receiver-side FT8 activity involving SP4AB, decoded by SO8OO in southeastern Poland. 100 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, across 15 UTC dates in the available aggregate history. Observed between 2026-07-06 and 2026-09-11.

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 100 FT8 messages attributed to SP4AB as the transmitting token by decoded message structure across 15 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (44%), followed by 80 m (41%) and 20 m (12%). Several six-hour UTC windows tied for the largest share (88%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (67%); the estimated median was -4 dB.

Overview

100

Messages attributed

UTC dates decoded

Active 15-min windows

-4 dB

Estimated median S/N

Bands

160m · 3 80m · 41 40m · 44 20m · 12

First attributed message: 2026-07-06
Last attributed message: 2026-09-11 20:41 UTC

Observed FT8 message patterns

Attributed sample: 100 messages
Active dates: 15 UTC dates
Estimated median S/N: -4 dB
Estimated 10th-90th percentile: -17 to +8 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 14, moderate (-15 to -9 dB) 19, strong (≥ -8 dB) 67.

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 SP4AB in decoded directed-looking exchanges:

CN8NS · Morocco G7GEE · England HA5GAL · Hungary KK2I · United States M9VXR · England OK2VCR · Czech Republic SP6FME · Poland SP9JMZ · Poland DL9KM · Fed. Rep. of Germany S51XA · Slovenia DK7UY · Fed. Rep. of Germany DO5HOK · Fed. Rep. of Germany

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 SP4AB

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: KO03 · 52 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 400 km (approx.)
Last such locator decoded: 2026-09-11 20:41 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	SP4AB S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-11 20:40	80m	+2 / -	SP100PKP	- / -	3	Partial capture
09-11 06:11	40m	-10 / -	EA3HMM	- / -7	2	Partial capture
09-10 18:49	80m	+3 / -	OZ/KD0NDU	- / +7	3	Partial capture
09-08 20:47	160m	- / -17	DK100LH	-2 / -	2	Partial capture
09-08 20:36	160m	- / -9	HF100PKP	+10 / -	2	Partial capture
09-08 17:41	40m	-8 / -6	SP100PKP	-5 / +5	2	Partial capture
09-08 14:16	40m	-11 / -	HF100PKP	- / -	5	Partial capture
09-06 19:10	40m	-4 / -	SQ100PKP	- / -18	3	Partial capture
08-31 21:11	40m	-13 / -	RI1FJL	- / -	3	Partial capture
08-31 20:51	40m	-4 / -	RI1FJL	- / -	6	Partial capture
08-30 20:01	40m	0 / -	RI1FJL	- / -	4	Partial capture
08-20 21:21	40m	-6 / -	OJ0JR	- / +7	3	Partial capture
08-19 20:27	20m	- / -22	CN8NS	-10 / -	5	✓ Closing fragment
07-22 23:17	20m	- / -14	KK2I	-10 / -	3	✓ Closing fragment
07-22 22:55	20m	- / -	F5RRS	-18 / -	3	Partial capture
07-22 00:08	80m	- / -	EA8AR	-12 / -	3	Partial capture
07-22 00:06	80m	+7 / +2	PI4DX	+6 / -	3	✓ Closing observed
07-15 20:24	80m	+13 / -	SP9UPH	+20 / -	4	✓ Closing observed
07-15 20:22	80m	+4 / -	OL900JAR	+5 / -	3	Partial capture
07-15 20:19	80m	+13 / -1	DK7UY	+5 / +6	5	✓ Full exchange observed
07-15 20:18	80m	-8 / -	SP5ROM	+1 / -	2	✓ Closing observed
07-15 20:12	80m	-7 / +1	SQ5TOM	+6 / +2	6	✓ Full exchange observed
07-13 20:50	20m	- / -8	M7SLE	0 / -	5	Partial capture
07-13 17:13	20m	+2 / -	OK2VCR	- / -2	2	✓ Closing fragment
07-13 17:12	20m	+4 / -	SP9JMZ	- / -4	2	✓ Closing fragment
07-13 17:11	20m	-2 / -	SP6FME	- / +3	2	✓ Closing fragment
07-13 17:10	20m	+6 / -	M9VXR	- / -15	2	✓ Closing fragment
07-12 21:11	40m	-18 / -11	DL9KM	-11 / -7	11	✓ Full exchange observed
07-12 21:10	40m	-10 / -	S51XA	-6 / -14	3	✓ Closing observed
07-08 21:18	40m	- / -4	BD8ENU	-2 / -	2	Partial capture
07-08 21:06	40m	- / -	G4DBW	-2 / -	2	Partial capture
07-07 20:48	20m	-8 / -	KB1TZ	- / -15	2	Partial capture
07-06 21:55	80m	-4 / -2	DO5HOK	-8 / -12	4	✓ Full exchange observed
07-06 21:52	80m	-4 / -	DL6CGU	- / -15	2	Partial capture
07-06 21:49	80m	-4 / -	TN8GD	-21 / -	3	✓ Closing observed
07-06 21:48	80m	-4 / -9	IW2DNI	-8 / +1	10	✓ Full exchange observed
07-06 21:42	20m	- / -11	EA1IOK	-11 / -	2	Partial capture
07-06 20:59	40m	-20 / -11	TA1BX	-18 / -1	6	Partial capture
07-06 20:38	80m	+14 / -17	UA4FKT	+10 / +4	6	✓ Full exchange observed
07-06 20:36	80m	0 / -18	RN6MA	-2 / -8	6	✓ Full exchange observed
07-06 20:30	80m	+7 / -	<...>	- / -	7	Partial capture

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
000645  +7 1140  SP4AB PI4DX +02 (x2)
000815 -11 1750  SP4AB EA8AR IL18 (x3)
185615  +1 1087  3Z100PKP SP4AB KO03
185645  +4 1087  <SO100PKP> SP4AB R-09
185700  -9  985  SP4AB RR73; SP2TMT <...> -02
184900  +3  950  OZ/KD0NDU SP4AB KO03 (x2)
184945  +9 1072  SP4AB 3Z0SYBIR +04
185000  +2  950  OZ/KD0NDU SP4AB R+07
204000  +3 1349  <SP100PKP> SP4AB KO03 (x3)

40m

UTC    dB Audio  Message
191145  +3  931  SQ100PKP SP4AB R-18 (x2)
191245  +5  784  SP100PKP SP4AB R-18
141600  -9 1419  <HF100PKP> SP4AB KO03 (x5)
141830 -11 1318  SO100PKP SP4AB KO03
174115  -5 1330  SP4AB SP100PKP -06
174130  -8 1330  SP100PKP SP4AB R+05
060415  -9  300  KT4ZG SP4AB KO03
060515 -16  904  SP100PKP SP4AB R-02
061115 -11  319  EA3HMM SP4AB -07 (x2)

160m

UTC    dB Audio  Message
195915 -24 1299  <SO100PKP> SP4AB KO03
200030  +7 1357  SP4AB RR73; OM1AN <...> -04
202400  +1  651  SP4AB DM0CRACY -17
202430  -3  651  SP4AB RR73; DL1KYF <...> -18
203245 -14 1142  DK100LH SP4AB KO03
203515 -17 1089  DM0CRACY SP4AB KO03
203600 +11 1358  SP4AB HF100PKP -09 (x2)
203700 +14 1358  SP4AB RR73; SP5SJL <...> -12
204730  -3 1142  SP4AB DK100LH -17 (x2)

20m

UTC    dB Audio  Message
205245  -4  357  SP4AB M7SLE -08
225545 -20 1982  SP4AB F5RRS JN36 (x3)
231700  -9  964  SP4AB KK2I -14 (x3)
191700 -19 1300  SP4AB OJ0YL -06
202730  -7  976  SP4AB CN8NS -22 (x5)
203915 -12  766  SP4AB KG4OJT -17
052845 -15 1419  SP4AB ZL2BX -19

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