SP7JC — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Poland Most frequent locator attributed to this token: JO91

Receiver-side FT8 activity involving SP7JC, decoded by SO8OO in southeastern Poland. 326 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, 20m, across 9 UTC dates in the available aggregate history. Observed between 2026-07-18 and 2026-08-29.

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 326 FT8 messages attributed to SP7JC as the transmitting token by decoded message structure across 9 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (39%), followed by 80 m (36%) and 60 m (18%). Most decodes (95%) fell within the six-hour window 20:00-02:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (64%); the estimated median was -4 dB.

Overview

326

Messages attributed

UTC dates decoded

Active 15-min windows

-4 dB

Estimated median S/N

Bands

80m · 117 60m · 60 40m · 126 20m · 23

First attributed message: 2026-07-18
Last attributed message: 2026-08-29 21:48 UTC

Observed FT8 message patterns

Attributed sample: 326 messages
Active dates: 9 UTC dates
Estimated median S/N: -4 dB
Estimated 10th-90th percentile: -16 to +7 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 38, moderate (-15 to -9 dB) 79, strong (≥ -8 dB) 209.

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 SP7JC in decoded directed-looking exchanges:

VP2MAA · Montserrat ×2 EA5HM · Spain ×2 9K2GR · Kuwait DL8MKG · Fed. Rep. of Germany OK1DXR · Czech Republic XU7O · Cambodia YO4NF · Romania 5A1AL · Libya 8Q7PR · Maldives 9A1CCB · Croatia F5PBG · France IU2CEK · Italy

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 SP7JC

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: JO91 · 218 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 262 km (approx.)
Last such locator decoded: 2026-08-29 21:48 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	SP7JC S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-29 21:48	80m	0 / -12	UN8DSW	-22 / -	2	Partial capture
08-29 21:39	80m	+1 / -20	4X1UF	-21 / -18	15	Partial capture
08-23 12:15	40m	-6 / +1	SP3IPA	-3 / +10	5	✓ Full exchange observed
08-23 12:11	40m	-8 / -	<...>	- / -21	4	Partial capture
08-23 11:15	20m	-8 / -16	TK4QP	+7 / -	15	Partial capture
08-22 01:06	80m	+10 / -	TF3VS	- / -	2	Partial capture
08-22 01:03	80m	+7 / -	W9HT	- / -	4	Partial capture
08-22 01:00	80m	+8 / -	SV9MBH	- / -	5	Partial capture
08-22 00:58	80m	+11 / -	TF3VS	- / -	4	Partial capture
08-22 00:56	80m	+10 / -	N8KR	- / -	4	Partial capture
08-22 00:55	80m	+12 / -	VE9HF	- / -	3	Partial capture
08-22 00:52	80m	+8 / -	C31KC	- / -	5	Partial capture
08-22 00:49	80m	-4 / -	F5RRS	- / +7	2	✓ Closing fragment
08-22 00:47	80m	-2 / -21	EA5HM	-9 / -	7	✓ Closing observed
08-22 00:44	80m	-2 / -19	N1TQP	-6 / -4	7	✓ Full exchange observed
08-22 00:40	60m	-14 / -	YO8BJK	-14 / -5	3	✓ Closing observed
08-22 00:38	60m	-16 / +2	PA4PA	+2 / -	6	✓ Full exchange observed
08-22 00:36	60m	-13 / -	VE3FF	0 / -9	3	✓ Closing observed
08-22 00:31	60m	-14 / -	VE3FF	- / -	4	Partial capture
08-22 00:30	60m	-15 / -	W3FAY	-19 / -9	4	✓ Closing observed
08-22 00:27	60m	-14 / +4	DL9KM	-18 / -2	6	✓ Full exchange observed
08-22 00:26	60m	-16 / -6	TA2L	-2 / 0	4	✓ Full exchange observed
08-22 00:23	60m	-11 / -	N8OQ	- / -	4	Partial capture
08-22 00:23	60m	-2 / -3	WA1NGH	-14 / -3	5	✓ Full exchange observed
08-22 00:21	60m	+2 / -	KK2I	- / -14	3	✓ Closing fragment
08-22 00:14	40m	-3 / -	OA4ENG	- / -	11	Partial capture
08-22 00:08	40m	-3 / -	PJ2LS	- / -	8	Partial capture
08-21 23:16	40m	- / -13	RK3AW	-15 / -	2	✓ Closing fragment
08-21 23:03	40m	- / -	T77RN	-11 / -	2	✓ Closing fragment
08-21 22:56	80m	-4 / -	KP4AA	- / -	7	Partial capture
08-21 22:54	80m	- / -7	EC3A	0 / -	2	✓ Closing fragment
08-21 22:52	80m	0 / -12	IW9FRA	-6 / -9	7	✓ Full exchange observed
08-21 22:46	60m	+5 / +1	M5WJF	-6 / -10	6	✓ Full exchange observed
08-21 22:43	60m	+3 / -	DL1CC	-6 / -5	7	✓ Full exchange observed
08-20 23:20	40m	-3 / -	D2UY	- / -	5	Partial capture
08-20 23:14	40m	-1 / -17	8Q7PR	-12 / 0	11	✓ Full exchange observed
08-20 23:12	40m	-4 / -	OA4ENG	- / -	3	Partial capture
08-20 23:10	40m	-2 / -5	F5PBG	-7 / -8	6	✓ Full exchange observed
08-20 23:05	40m	+2 / -10	VP2MAA	-7 / -1	12	✓ Full exchange observed
08-20 22:40	20m	-21 / -	BV2NF	- / -13	10	Partial capture
08-20 22:05	20m	- / -2	XU7O	+2 / -	2	✓ Closing fragment
08-20 21:55	20m	- / -13	YO4NF	+1 / -	2	Partial capture
08-20 10:38	10m	- / -4	9K2GR	-10 / -	2	✓ Closing fragment
08-19 21:52	80m	- / -1	OZ/KD0NDU	-12 / -	2	Partial capture
08-19 21:50	80m	-8 / -	<...>	- / -	2	Partial capture
08-19 21:06	40m	- / -13	IU2CEK	-20 / -	2	✓ Closing fragment
08-19 20:48	40m	-20 / -	<...>	- / -13	2	Partial capture
08-19 20:35	40m	- / -15	9A1CCB	-6 / -	5	✓ Closing fragment
08-19 20:27	40m	-17 / -	VK6BAD	- / -25	4	Partial capture
08-19 20:25	40m	-16 / -	F5LMJ	- / -25	3	Partial capture

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
214030  +4 1364  4X1UF SP7JC R-07 (x2)
214145 -22  198  SP7JC 4X1UF -20
214200  +1 1364  4X1UF SP7JC R-09
214215 -20  198  SP7JC 4X1UF -20 (x3)
214430  +0 1014  4X1UF SP7JC R-09
214515 -19  199  SP7JC 4X1UF -20 (x3)
214800  +6 1014  4X1UF SP7JC R-08
214815 -24  198  SP7JC 4X1UF -20
214830  +0 1014  UN8DSW SP7JC JO91
214945 -22 1994  SP7JC UN8DSW -12

20m

UTC    dB Audio  Message
111600 -10 1069  TK4QP SP7JC JO91 (x6)
111915  +6 1070  SP7JC TK4QP -16
111930 -10 1070  TK4QP SP7JC JO91
111945  +7 1070  SP7JC TK4QP -16
112000  -5 1069  TK4QP SP7JC JO91
112015  +7 1069  SP7JC TK4QP -18
112030 -10 1070  TK4QP SP7JC JO91 (x2)
112145  +9 1070  SP7JC TK4QP -17
122445 -16 2407  SP7JC S51PV -08

40m

UTC    dB Audio  Message
001645  -3 1158  OA4ENG SP7JC JO91 (x6)
121145 -10 1009  <...> SP7JC JO91 (x4)
121530  +2 1023  SP7JC SP3IPA JO82
121545  -4 1009  SP3IPA SP7JC +10
121600  -5 1023  SP7JC SP3IPA R+01
121615  -7 1009  SP3IPA SP7JC RR73
121630  -6 1023  SP7JC SP3IPA 73

60m

UTC    dB Audio  Message
003315 -15 1148  VE3FF SP7JC JO91 (x4)
003700  +0 2701  SP7JC VE3FF RR73
003715 -13 1148  VE3FF SP7JC 73
003845 -16 1148  PA4PA SP7JC JO91 (x2)
003930  +2  232  SP7JC PA4PA +02
003945 -16 1148  PA4PA SP7JC R+16
004000  +2  232  SP7JC PA4PA RR73
004015 -16 1148  PA4PA SP7JC 73
004045 -13 1148  YO8BJK SP7JC JO91 (x2)
004130 -14 1148  SP7JC YO8BJK RR73

10m

UTC    dB Audio  Message
095100 -20 1571  SP7JC 9A4ZM JN86
103800 -12 2164  SP7JC 9K2GR -04 (x2)

160m

UTC    dB Audio  Message
213330 -15 1446  SP7JC DL8MKG +02 (x2)
213430 -13 1284  SP7JC OK1DXR JO60 (x5)

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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