SP1TJ — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Poland Most frequent locator attributed to this token: JO74

Receiver-side FT8 activity involving SP1TJ, decoded by SO8OO in southeastern Poland. 2,057 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 93 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 2,057 FT8 messages attributed to SP1TJ as the transmitting token by decoded message structure across 93 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (45%), followed by 20 m (30%) and 80 m (24%). Most decodes (59%) fell within the six-hour window 02:00-08:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (69%); the estimated median was -4 dB.

Overview

2,057

Messages attributed

UTC dates decoded

445

Active 15-min windows

-4 dB

Estimated median S/N

Bands

80m · 496 40m · 921 20m · 613 10m · 27

First attributed message: 2026-06-07
Last attributed message: 2026-09-20 05:50 UTC

Observed FT8 message patterns

Attributed sample: 2,057 messages
Active dates: 93 UTC dates
Estimated median S/N: -4 dB
Estimated 10th-90th percentile: -15.5 to +7 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 205, moderate (-15 to -9 dB) 425, strong (≥ -8 dB) 1,427.

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 SP1TJ in decoded directed-looking exchanges:

II6WWA · Italy ×2 TM2WWA · France ×2 II8WWA · Italy ×2 SQ2RBY/P · Poland ×2 II0CDS · Italy ×2 TN8GD · Republic of the Congo ×2 CR2WWA · Azores G3ZOH · England IQ4JO · Italy LA4SI · Norway OO0O · Belgium PD3LKN · Netherlands

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 SP1TJ

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: JO74 · 1,549 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 686 km (approx.)
Last such locator decoded: 2026-09-20 05:50 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	SP1TJ S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-20 05:51	40m	- / -	DL9KM	-2 / -	7	Partial capture
09-20 05:49	40m	+8 / -	SP5RZL	- / -9	3	Partial capture
09-20 05:07	80m	-4 / -4	SQ7OBB	-3 / -9	3	✓ Full exchange observed
09-18 04:58	80m	+2 / -	N3HPX	- / -	12	Partial capture
09-18 00:12	80m	+7 / -	EX7DY	- / -	8	Partial capture
09-17 06:09	40m	-4 / -	WZ8S	- / -12	4	✓ Closing fragment
09-17 05:52	80m	+4 / -	5Q7DX	-12 / -1	5	✓ Full exchange observed
09-17 05:33	40m	-9 / -	R7KCK	- / -23	4	✓ Closing fragment
09-16 07:02	40m	+9 / -	ON2VHF/P	- / -16	3	✓ Closing fragment
09-15 04:11	40m	0 / -	N4BFR	-23 / -19	4	✓ Closing observed
09-15 04:08	80m	-2 / -	VE3BNW	- / -	2	Partial capture
09-15 04:07	80m	+1 / -	KE2ICI	- / -	3	Partial capture
09-15 03:39	80m	-12 / -	SK150LM	- / -	2	Partial capture
09-15 03:21	80m	-5 / -3	PA4PA	-9 / +3	5	✓ Full exchange observed
09-15 03:13	80m	+8 / -	KZ4MW	- / -	3	Partial capture
09-14 04:51	80m	-12 / -	HC1BG	- / -	8	Partial capture
09-14 04:49	80m	-14 / -	KU4XR	- / -	2	Partial capture
09-14 04:43	80m	-7 / -	NT9F	- / -	2	Partial capture
09-13 05:10	80m	-1 / -	II0CDS	- / -	2	Partial capture
09-13 04:57	80m	+12 / -	K1ZM	- / -	3	Partial capture
09-13 04:47	80m	-4 / -	PY8WW	- / -	14	Partial capture
09-13 04:43	80m	-2 / -2	SN40KZE	+6 / +3	4	Partial capture
09-12 05:50	80m	0 / -15	SP100PKP	-1 / -13	9	Partial capture
09-12 05:48	80m	-3 / -	II6IALU	- / -	3	Partial capture
09-12 05:41	80m	-19 / -	SP100PKP	- / -	2	Partial capture
09-12 04:40	40m	-10 / -	II7IAME	- / -2	2	Partial capture
09-12 04:10	80m	-13 / -	II7IAME	- / -	3	Partial capture
09-12 03:48	80m	-7 / -	HC1BG	- / -	2	Partial capture
09-12 03:45	80m	-8 / -	HC1BG	- / -	2	Partial capture
09-12 03:13	80m	+1 / -	KD2ZZA	- / -	2	Partial capture
09-12 02:47	80m	-3 / -	YV6BXN	- / -	6	Partial capture
09-12 02:46	80m	+2 / -12	R2EN	+2 / -2	4	✓ Full exchange observed
09-12 02:45	80m	+3 / -16	II0CDS	-16 / -7	5	✓ Full exchange observed
09-11 16:32	40m	+7 / -5	II9IAGM	-18 / -15	6	Partial capture
09-11 16:29	40m	0 / -4	II8IHBC	-10 / -14	3	Partial capture
09-11 16:24	40m	+3 / -	HF100PKP	- / -14	3	Partial capture
09-11 09:28	40m	- / +1	SP7VCL	-11 / -	2	✓ Closing fragment
09-11 09:27	40m	-8 / -2	WS7ZCL/R	+2 / -14	2	Partial capture
09-11 08:18	40m	+8 / -	HF100PKP	- / -14	5	Partial capture
09-11 08:11	40m	+10 / -	GB50PUNK	- / -5	2	Partial capture
09-11 06:59	40m	+1 / -	SP100PKP	- / -24	6	Partial capture
09-11 05:58	40m	-3 / -	SP100PKP	- / -17	3	Partial capture
09-11 05:35	40m	+2 / -	SN100PKP	- / -17	2	Partial capture
09-11 05:02	80m	-10 / +4	SN40KZE	+2 / 0	4	Partial capture
09-11 04:47	80m	- / -12	HF100PKP	+2 / -	2	Partial capture
09-11 04:31	40m	-5 / -	II0CDS	- / -13	3	✓ Closing fragment
09-11 04:29	80m	-2 / -	AK4AT	- / -	3	Partial capture
09-11 04:25	80m	-3 / -	J38DX	- / -	3	Partial capture
09-11 04:21	80m	-11 / -	SN100PKP	- / -14	2	Partial capture
09-11 04:19	80m	+3 / -2	SP100PKP	+18 / +2	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
061100  -5 1183  WZ8S SP1TJ R-12 (x2)
061230  +9 1183  GJ0KYZ SP1TJ 73
225915 -12  343  KT4ZG SP1TJ JO74
050300 +10  640  F4MOJ/P SP1TJ JO74
054930  +7 1037  SP5RZL SP1TJ JO74 (x3)
055115  -3 2153  SP1TJ DL9KM JN68 (x7)

80m

UTC    dB Audio  Message
045900  +6 1985  N3HPX SP1TJ JO74 (x11)
214745 +16  338  SP1TJ HF40BLP -16
050745  -3 1550  SP1TJ SQ7OBB -04
050800  -8 1551  SQ7OBB SP1TJ R-09 (x2)

20m

UTC    dB Audio  Message
052530 -11 2734  SP1TJ ZL3GAV -15 (x4)
065600 -11  767  SP1TJ M0KCB/P -10
195900 -10  325  BI4MPH SP1TJ JO74 (x3)
082730 -10 1487  SP1TJ HB9ITZ -10 (x2)
154830  +1 2153  SP1TJ M8KKH JO01 (x5)

10m

UTC    dB Audio  Message
094945 +10 2850  SP1TJ II6WWA RR73
095145 +13 2796  SP1TJ TM2WWA -04 (x2)
115230 -11 2538  SP1TJ TM74TFR +19
114430 -11 2645  SP1TJ F1PBZ -13
143930  -2  654  SP1TJ TM84TFR -15
144100  +1  654  SP1TJ <...> -15 (x2)
085045 -17 1346  SP1TJ UA4FKT LO23 (x2)
155615  -3 2949  SP1TJ DO1FDK JO41
102215  -8  996  SP1TJ <...> -06
135815  +0  349  SP1TJ IU2VBP JN45 (x2)
091930 -16 1879  SP1TJ II7MGMU -03

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