SP5DFK — reception at SO8OO

Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.

FT8 activity

DXCC entity inferred from callsign: Poland Most frequent locator attributed to this token: JO82

Receiver-side FT8 activity involving SP5DFK, decoded by SO8OO in southeastern Poland. 5,350 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, 20m, across 96 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-10-23.

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 5,350 FT8 messages attributed to SP5DFK as the transmitting token by decoded message structure across 96 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (92%), followed by 40 m (5%) and 60 m (2%). Most decodes (78%) fell within the six-hour window 17:00-23:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (73%); the estimated median was -3.2 dB.

Overview

5,350

Messages attributed

UTC dates decoded

568

Active 15-min windows

-3.2 dB

Estimated median S/N

Bands

80m · 4,941 60m · 126 40m · 262 20m · 21

First attributed message: 2026-06-06
Last attributed message: 2026-10-23 18:15 UTC

Observed FT8 message patterns

Attributed sample: 5,350 messages
Active dates: 96 UTC dates
Estimated median S/N: -3.2 dB
Estimated 10th-90th percentile: -15 to +5.3 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 476, moderate (-15 to -9 dB) 946, strong (≥ -8 dB) 3,928.

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 SP5DFK in decoded directed-looking exchanges:

HA7TM · Hungary ×6 9A5E · Croatia ×4 DO9BAU · Fed. Rep. of Germany ×4 OM5JG · Slovak Republic ×3 PI4DX · Netherlands ×3 SP8AWL · Poland ×3 DL5CK · Fed. Rep. of Germany ×3 YO5QDI · Romania ×3 9A6NCC · Croatia ×2 HG0NPJ · Hungary ×2 OH5KZ · Finland ×2 PE1NAO · Netherlands ×2

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 SP5DFK

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: JO82 · 3,212 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 439 km (approx.)
Last such locator decoded: 2026-10-03 05:33 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	SP5DFK S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-16 05:05	80m	-23 / -	SP5DFK/QRP	- / +4	3	Partial capture
10-13 17:39	80m	-5 / -	SP5DFK/QRP	- / -10	4	Partial capture
10-11 19:07	80m	-1 / -	EO210WLP	- / -9	2	Partial capture
10-07 20:35	80m	-3 / -7	HF40BLP	+9 / -4	3	Partial capture
10-07 16:37	80m	-4 / -8	SP5DFK/QRP	-16 / +3	4	Partial capture
10-05 21:12	80m	+2 / -	SP0YAGI	- / -8	6	Partial capture
10-05 17:06	80m	-17 / -7	SP5DFK/QRP	-1 / +3	4	Partial capture
10-03 08:43	40m	- / -16	9A5AZK	-12 / -	2	✓ Closing fragment
10-03 05:31	80m	-12 / -	IK4IDY	- / -	2	Partial capture
10-03 05:30	80m	-2 / -	ON6YX	- / -	3	Partial capture
10-03 05:30	80m	-10 / -	M7VOD	- / -	2	Partial capture
10-03 05:26	80m	-4 / -	IQ6MW	- / -	3	Partial capture
10-03 05:20	80m	-5 / -	G4VYC	- / -13	4	Partial capture
10-03 05:19	80m	-6 / -	IK4IDY	- / -	2	Partial capture
10-03 05:18	80m	-2 / -	IQ6MW	- / -	2	Partial capture
10-03 05:14	80m	-8 / -	RU3X	- / -	2	Partial capture
10-03 05:09	80m	+2 / -21	DO1OAS	-4 / +3	6	✓ Full exchange observed
10-03 05:08	80m	+3 / -8	DO4DXA	+6 / +4	5	✓ Full exchange observed
10-03 05:00	80m	+5 / -24	ON1JP	-13 / -6	4	✓ Full exchange observed
10-03 04:58	80m	+1 / +7	LY5A	+8 / +10	5	✓ Full exchange observed
10-03 04:54	80m	-3 / -	II4NTTI	- / -13	3	Partial capture
10-03 04:53	80m	-10 / -13	DD4U	-7 / +4	3	✓ Full exchange observed
10-03 04:51	80m	+1 / +1	SQ100LKK	+10 / -	3	Partial capture
10-03 04:47	80m	+1 / -20	IQ9SZ/2	-4 / +4	2	Partial capture
10-03 04:45	80m	-2 / -	SP0LPR	- / +4	3	✓ Closing fragment
10-03 04:42	80m	-8 / -6	US8KA	+8 / -	5	✓ Full exchange observed
10-03 04:41	80m	-6 / -8	LY5A	+4 / +7	5	✓ Full exchange observed
10-02 03:58	80m	-9 / -	EV1R	+18 / -	2	✓ Closing observed
10-02 03:53	80m	-13 / -13	R3RB	-9 / -7	4	✓ Full exchange observed
10-02 03:49	80m	-8 / -11	DF9JL	-2 / +10	4	✓ Full exchange observed
10-02 03:47	80m	-16 / +4	DF2GH	+3 / -	5	✓ Full exchange observed
10-02 03:44	80m	-21 / -10	OH2XX	0 / +7	4	✓ Full exchange observed
10-01 19:19	80m	- / -7	E75C	-9 / -	4	Partial capture
10-01 19:19	80m	-6 / -	DK0BO	- / -	2	Partial capture
10-01 19:10	80m	-3 / -11	DH8IAT	-10 / -8	5	✓ Full exchange observed
10-01 19:05	80m	- / -6	DO6THI	-12 / -	2	✓ Closing fragment
10-01 19:03	80m	-6 / -	ON4CVL	- / -	2	Partial capture
10-01 19:00	80m	-4 / -	OM/DL7AU/P	- / +10	3	Partial capture
10-01 18:00	80m	-7 / -	SP5DFK/QRP	- / -16	3	Partial capture
10-01 17:53	80m	-8 / -	SP5DFK/QRP	- / -10	3	Partial capture
09-27 18:03	80m	-5 / -	DL2MEL	-14 / -	3	✓ Closing observed
09-27 18:03	80m	- / -	UR5HAN	-12 / -	2	✓ Closing fragment
09-27 17:57	80m	-7 / -15	OE1TOA	+5 / -4	6	✓ Full exchange observed
09-27 17:53	80m	-1 / -9	OE1SGU	+9 / +8	3	✓ Full exchange observed
09-27 17:50	80m	+1 / -	R3DQT	- / -9	4	Partial capture
09-26 19:51	80m	-13 / -14	LB6MJ	-16 / -14	4	✓ Full exchange observed
09-26 19:48	80m	+4 / -25	G0NIG	-7 / -10	3	Partial capture
09-26 19:42	80m	-2 / -17	9A6NCC	+3 / -	4	✓ Closing observed
09-26 19:36	80m	-4 / +3	DO7DBI	-2 / -7	5	✓ Full exchange observed
09-26 19:35	80m	- / -14	UT0UE	-4 / -	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
163745 -14 1177  SP5DFK SP5DFK/QRP R-08 (x2)
203545  -4  280  HF40BLP SP5DFK -04 (x2)
203630  +9  280  SP5DFK HF40BLP R-07
190715  +0 1493  EO210WLP SP5DFK -09 (x2)
173930  -6 1065  SP5DFK/QRP SP5DFK -10 (x7)
181500  +6 1556  DB100FT SP5DFK -08

40m

UTC    dB Audio  Message
034300  +4 1140  SP5DFK UA4FKT LO23 (x4)
035515  +4 1980  SP5DFK LZ936BA -06
035715 -14 1090  SP5DFK R3IX -16
035845  +5  474  SP5DFK EB3DBR -13 (x2)
192730 -17 2381  SP5DFK SM2OTU -06 (x3)
193700 -15 1165  SP5DFK OH5KZ RR73
084315 -12  540  SP5DFK 9A5AZK -16 (x2)
115845  +4  319  SP5DFK HF40BLP R-15

60m

UTC    dB Audio  Message
194930  +4 1382  SP5DFK ON6LEO -13 (x2)
195145 -10 1261  SP5DFK S5/M0MPM -15
195245  +0  761  SP5DFK SP5JMA KO02 (x4)
184145 -11  887  DK7UY SP5DFK JO82
184245 -24 1978  9A4ZM SP5DFK JO82
184330  +7  889  SP5DFK DK7UY -15
184345 -14  887  DK7UY SP5DFK R+07
184400  +4  889  SP5DFK DK7UY -15 (x2)
184445 -14  887  DK7UY SP5DFK R+10
184530  +5  889  SP5DFK DK7UY RR73

20m

UTC    dB Audio  Message
132445  -5  294  SP5DFK IZ2CPO/QRP -24
132545 -10  294  SP5DFK <...> -24 (x2)
184145  -8  255  SP5DFK 4X1UF -11 (x2)
175700 -10 2087  SP5DFK R3UAX -02 (x2)
145915 -14 2430  SP5DFK R35ARDF R-19
074245  -4 1416  SP5DFK LZ6C R-15 (x2)
075445  +3 1643  SP5DFK UA3VVA R-12 (x2)
080015  -5 1804  SP5DFK R6BH R-23 (x3)

10m

UTC    dB Audio  Message
084300 -13  766  SP5DFK UR5VPR RR73
084400 -23 1647  SP5DFK F5RMK -12
094300 -18 1405  SP5DFK RZ6AOJ -12 (x2)
094945 -15 1012  SP5DFK EN35UKR -18
140530 -18 2101  SP5DFK UT4EO -20 (x2)
141245  -4  842  SP5DFK US0QV RR73
131200  -1 1234  SP5DFK LZ1EV -15 (x2)
131300  +6 1234  SP5DFK RR73; HG8LXL <...> -18
145645  -9 1758  SP5DFK <...> -15
150630 -10 2293  SP5DFK SV2JAO -12 (x2)
073315 -22 1535  SP5DFK <...> R-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.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

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