SP1373AB — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Poland

Receiver-side FT8 activity involving SP1373AB, decoded by SO8OO in southeastern Poland. 287 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 8 UTC dates in the available aggregate history. Observed between 2026-09-02 and 2026-09-14.

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 287 FT8 messages attributed to SP1373AB as the transmitting token by decoded message structure across 8 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (82%), followed by 80 m (18%). Most decodes (75%) fell within the six-hour window 12:00-18:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (74%); the estimated median was -3.4 dB.

Overview

287

Messages attributed

UTC dates decoded

Active 15-min windows

-3.4 dB

Estimated median S/N

Bands

80m · 51 40m · 236

First attributed message: 2026-09-02
Last attributed message: 2026-09-14 19:15 UTC

Observed FT8 message patterns

Attributed sample: 287 messages
Active dates: 8 UTC dates
Estimated median S/N: -3.4 dB
Estimated 10th-90th percentile: -17 to +9 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 34, moderate (-15 to -9 dB) 41, strong (≥ -8 dB) 212.

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 SP1373AB in decoded directed-looking exchanges:

Z335MK · North Macedonia ×4 HF780C · Poland ×2 DL7UKM · Fed. Rep. of Germany EO80F · Ukraine SP6JM · Poland LY790A · Lithuania

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.

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	SP1373AB S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-15 06:18	40m	- / -	EA5RO	-9 / -	4	Partial capture
09-15 03:25	80m	- / -6	Z35T	+7 / -	2	Partial capture
09-15 01:32	80m	- / -2	RA9FUE	-5 / -	3	Partial capture
09-14 21:47	80m	- / -2	OH2NAG	+8 / -	4	Partial capture
09-14 21:13	80m	- / -	ON4MAP	-11 / -	3	Partial capture
09-14 20:25	80m	- / -11	EU1EU	0 / -	2	Partial capture
09-14 19:16	80m	- / -	DK7SB	-5 / -	4	Partial capture
09-14 19:15	80m	-2 / -	Z335MK	-12 / -	2	✓ Closing observed
09-14 19:14	80m	-7 / -14	DK2LO	-2 / -16	3	Partial capture
09-14 18:47	80m	- / -9	EA5TT	-12 / -	3	Partial capture
09-14 18:32	80m	- / -8	SQ6PM	+17 / -	2	Partial capture
09-14 17:11	80m	- / -	EW4M	+8 / -	2	Partial capture
09-14 17:05	80m	+11 / -	<...>	-10 / -	7	✓ Closing fragment
09-14 17:04	80m	+13 / -1	9A4ZM	0 / +6	3	Partial capture
09-14 17:02	80m	- / -7	DL4YCD	-21 / -	7	Partial capture
09-14 16:06	40m	- / -	SP3SBY	-6 / -	2	Partial capture
09-14 15:52	80m	+9 / -	<...>	-7 / -	2	✓ Closing fragment
09-14 15:52	80m	+3 / -13	DO1FZL	-5 / -11	2	Partial capture
09-14 15:46	40m	+5 / -	DL1NEO	+11 / +1	2	Partial capture
09-14 15:44	40m	- / -7	OE6OCG	+7 / -	2	Partial capture
09-14 15:39	40m	+6 / -	<...>	+7 / -	11	✓ Closing fragment
09-14 15:30	40m	+5 / -18	RA6OY	+3 / +4	5	Partial capture
09-14 15:30	40m	+4 / 0	SP7VCL	+2 / -2	2	Partial capture
09-14 15:26	40m	+2 / -	<...>	+3 / -	10	✓ Closing fragment
09-11 16:06	40m	- / -15	UA4PDJ	-5 / -	4	Partial capture
09-11 06:05	40m	- / -	HA7TM	+8 / -	2	Partial capture
09-11 06:04	40m	- / -	9A4ZM	-6 / -	2	Partial capture
09-11 05:00	40m	0 / -	IK4TVP	- / +3	2	Partial capture
09-10 20:52	40m	- / -8	YO3GNF	-5 / -	2	Partial capture
09-10 18:33	40m	- / -11	RU6UR	-14 / -	2	Partial capture
09-10 16:12	40m	- / -	DL1CC	-1 / -	8	Partial capture
09-10 14:57	40m	- / +1	EW6CY	-8 / -	2	Partial capture
09-10 11:28	40m	- / -	<...>	-8 / -	2	✓ Closing fragment
09-10 10:15	40m	- / -	DL5ARM	-18 / -	2	Partial capture
09-10 09:12	40m	- / -11	9A1CC	-14 / -	2	Partial capture
09-10 07:11	40m	- / 0	S51CC	-8 / -	5	Partial capture
09-10 07:04	40m	- / -24	SP1TJ	-8 / -	6	Partial capture
09-10 06:59	40m	- / -4	ER3CT	-3 / -	2	Partial capture
09-10 06:55	40m	- / -	YL3KZ	-5 / -	3	Partial capture
09-10 06:50	40m	- / -1	OK1ACE	-4 / -	7	Partial capture
09-10 06:15	40m	- / -	LA3BO	-11 / -	2	Partial capture
09-10 06:08	40m	- / -	ES6RMR	-18 / -	2	Partial capture
09-10 06:08	40m	- / -	<...>	-6 / -	3	✓ Closing fragment
09-10 05:49	40m	- / 0	ES6RMR	-7 / -	6	Partial capture
09-10 05:40	40m	- / -	PD1BER	-8 / -	10	Partial capture
09-10 04:48	40m	- / -	HB9CEV	-3 / -	3	Partial capture
09-10 04:41	40m	- / -	DL1GLO	-9 / -	5	Partial capture
09-10 04:19	40m	- / -11	RA3XDX	+4 / -	2	Partial capture
09-10 03:46	40m	- / -	RX6LHY	-9 / -	5	Partial capture
09-10 03:43	80m	- / -21	WB8SCG	-17 / -	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
154630  +5  605  DL1NEO SP1373AB +01
154700  +7  605  <...> SP1373AB RR73
154715  +5  604  SP1373AB <...> 73
160630  -3 1182  SP1373AB SP3SBY JO70 (x2)
170215 -21 1343  SP1373AB M6INJ IO90
175315 -19 1341  SP1373AB HA8DG R-06
030830 -18 1172  SP1373AB KB4UF EM90
061815  -7  607  SP1373AB EA5RO IM99 (x4)
133500  +1  895  SP1373AB SP3IPA +01 (x2)
141415 -15 1171  SP1373AB DG4MCB R-05

80m

UTC    dB Audio  Message
211315  -9  575  SP1373AB ON4MAP JO20 (x3)
212945  -7  800  SP1373AB F1PBZ -05
214745  +6  783  SP1373AB OH2NAG KP20 (x4)
214930  -1  800  SP1373AB F1PBZ -08
013245  -4  996  SP1373AB RA9FUE LO89
013300  +0  633  SP1373AB EW8CW R+10
013415  -7  996  SP1373AB RA9FUE LO89 (x2)
032545  +3  573  SP1373AB Z35T KN11 (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.

FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee