SP5TBR — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Poland Most frequent locator attributed to this token: KO02

Receiver-side FT8 activity involving SP5TBR, decoded by SO8OO in southeastern Poland. 87 FT8 messages attributed to this token as transmitter, on 80m, 20m, across 2 UTC dates in the available aggregate history. Observed between 2026-07-15 and 2026-08-20.

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 87 FT8 messages attributed to SP5TBR as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (60%), followed by 20 m (40%). In this small sample, the estimated median decoder S/N was -11 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-11 dB

Estimated median S/N

Bands

80m · 52 20m · 35

First attributed message: 2026-07-15
Last attributed message: 2026-08-20 15:14 UTC

Observed FT8 message patterns

Attributed sample: 87 messages
Active dates: 2 UTC dates
Estimated median S/N: -11 dB
Estimated 10th-90th percentile: -23 to -4 dB
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 19, moderate (-15 to -9 dB) 40, strong (≥ -8 dB) 28.

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 SP5TBR in decoded directed-looking exchanges:

DL6RH · Fed. Rep. of Germany ×2 9A3K · Croatia DL3MIB · Fed. Rep. of Germany DN2FBG · Fed. Rep. of Germany EA5D · Spain EI6JLB · Ireland F4ACR · France F4JKY · France F4PCM · France G0LKL · England G7SQC · England HB9DLT · Switzerland

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 SP5TBR

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: KO02 · 33 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 290 km (approx.)
Last such locator decoded: 2026-07-15 21:47 UTC

Other locator fields attributed to this token: JO84 (5).

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	SP5TBR S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-12 17:47	40m	- / -	DJ0MAB	+6 / -	2	Partial capture
09-12 17:38	40m	- / -21	DJ0MAB	-4 / -	3	Partial capture
09-12 17:34	40m	- / -	OZ5AGJ	-8 / -	3	Partial capture
09-12 17:22	40m	- / -16	9A6TT	+12 / -	7	Partial capture
08-20 15:12	20m	-16 / -	DL1R	+6 / -8	10	Partial capture
08-20 15:06	20m	-20 / -19	CT1GFK	-14 / -6	2	Partial capture
08-20 15:05	20m	- / -	M9PMB	+1 / -	4	Partial capture
08-20 15:02	20m	-16 / -13	G7SQC	+1 / -6	9	✓ Full exchange observed
08-20 15:01	20m	-15 / -8	R7MP	-2 / -6	4	✓ Full exchange observed
08-20 14:57	20m	-12 / -	R6ZAA	- / -5	2	Partial capture
08-20 14:50	20m	-11 / -	IU3UMB	- / -6	6	Partial capture
08-20 14:50	20m	- / -	F1PPH	-2 / -	5	Partial capture
08-20 14:50	20m	-10 / -10	G0LKL	-3 / -6	14	✓ Full exchange observed
08-20 14:44	20m	- / -1	IW0FGX	+1 / -	2	✓ Closing fragment
08-20 14:40	20m	- / -10	OE7LVI	-12 / -	3	Partial capture
08-20 14:39	20m	-8 / -	DL6RH	-20 / -	2	✓ Closing observed
08-20 14:38	20m	- / -	G0LKL	-8 / -	9	Partial capture
08-20 14:32	20m	- / -	G0LKL	-1 / -	3	Partial capture
08-20 14:29	20m	-14 / -	R3PLN/P	- / -6	3	✓ Closing fragment
08-20 14:29	20m	-13 / -8	DH1NGL	-11 / -6	10	Partial capture
08-20 14:24	20m	-10 / -	EI6JLB	- / -7	2	✓ Closing fragment
08-20 14:22	20m	-12 / -4	F4JKY	+5 / -	8	✓ Closing observed
08-20 14:20	20m	- / +8	F4PCM	+11 / -	3	✓ Closing fragment
08-20 14:19	20m	- / -	PA3GOV	-9 / -	5	Partial capture
08-20 14:17	20m	- / -3	DH1NGL	-12 / -	2	Partial capture
08-20 14:12	20m	- / +3	9A170NT	+9 / -	2	Partial capture
08-20 14:07	20m	- / -9	G0LKL	0 / -	4	Partial capture
08-20 13:53	20m	- / -	M9DJN	-12 / -	2	Partial capture
08-20 13:52	20m	- / -	EA5D	-15 / -	4	Partial capture
08-20 13:52	20m	- / +1	F4HSB	-6 / -	7	Partial capture
08-20 13:52	20m	- / -6	RN6MA	+11 / -	2	✓ Closing fragment
08-20 13:47	20m	- / -	CT1GFK	-12 / -	2	Partial capture
08-20 13:43	20m	- / -	CT1GFK	-16 / -	3	Partial capture
08-20 08:53	20m	-24 / -18	TF5B	-17 / -	3	✓ Closing observed
08-19 14:15	20m	- / -	DL3MIB	-3 / -	3	✓ Closing fragment
08-19 14:00	20m	- / -10	9A3K	+5 / -	3	✓ Closing fragment
08-19 14:00	20m	- / -12	IK4IDP	0 / -	6	✓ Closing fragment
08-18 18:29	40m	- / -11	EU4U	+1 / -	2	✓ Closing fragment
08-17 17:53	20m	- / -3	ON4AOI	-7 / -	2	✓ Closing fragment
08-17 17:33	20m	- / +2	F4ACR	+6 / -	3	✓ Closing fragment
07-15 21:47	80m	-11 / -18	YT5DL	+8 / -8	5	Partial capture
07-15 21:46	80m	- / -	HB9MZI	-16 / -	2	Partial capture
07-15 21:41	80m	- / -17	UX7QV	+8 / -	3	✓ Closing fragment
07-15 21:39	80m	-6 / -14	UA3VVA	+8 / -11	4	✓ Full exchange observed
07-15 21:35	80m	-7 / -19	OE3OOG	+4 / -8	4	✓ Full exchange observed
07-15 21:34	80m	- / -	HB9MZI	-20 / -	4	Partial capture
07-15 21:34	80m	- / -10	OZ1JMJ	-3 / -	3	✓ Closing fragment
07-15 21:29	80m	- / -11	DO1OAS	-16 / -	2	Partial capture
07-15 21:25	80m	-7 / -14	OH7KQV	-4 / -5	5	✓ Full exchange observed
07-15 21:25	80m	-5 / -12	UA3IHJ	+8 / -7	7	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
172300 +12 2864  SP5TBR 9A6TT -16 (x6)
173400  -9  902  SP5TBR OZ5AGJ JO47 (x4)
173830 -11  902  SP5TBR DJ0MAB JN49 (x5)

20m

UTC    dB Audio  Message
150645 -20 2007  CT1GFK SP5TBR -06
150700 -14 1396  SP5TBR CT1GFK R-19
150930  -8 1767  SP5TBR DN2FBG 73
151145 -14 2008  CQ POTA SP5TBR JO84
151200  +2 2656  SP5TBR DL1R JN58 (x5)
151415 -16 2007  DL1R SP5TBR -08
151430  +5 2656  SP5TBR DL1R JN58 (x4)
151800 -17 2008  SP5TBR PA0KGB JO22

80m

UTC    dB Audio  Message
214200 +11 1440  SP5TBR UX7QV 73
214445  -9 1440  CQ SP5TBR KO02 (x3)
214600 -16 1440  SP5TBR HB9MZI JN46
214615  -8 1440  CQ SP5TBR KO02 (x2)
214700 -15 1440  SP5TBR HB9MZI JN46
214715 -10 1440  CQ SP5TBR KO02
214730  +7 1441  SP5TBR YT5DL KN04
214745 -11 1440  YT5DL SP5TBR -08
214800  +6 1441  SP5TBR YT5DL KN04 (x3)
214930 -17 1440  SP5TBR HB9MZI JN46

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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