SQ4FDK — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Poland Most frequent locator attributed to this token: KO14

Receiver-side FT8 activity involving SQ4FDK, decoded by SO8OO in southeastern Poland. 400 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 44 UTC dates in the available aggregate history. Observed between 2026-06-06 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 400 FT8 messages attributed to SQ4FDK as the transmitting token by decoded message structure across 44 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (55%), followed by 80 m (39%) and 20 m (6%). Most decodes (82%) fell within the six-hour window 16:00-22:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (72%); the estimated median was -1.7 dB.

Overview

400

Messages attributed

UTC dates decoded

Active 15-min windows

-1.7 dB

Estimated median S/N

Bands

80m · 157 40m · 218 20m · 25

First attributed message: 2026-06-06
Last attributed message: 2026-09-20 04:25 UTC

Observed FT8 message patterns

Attributed sample: 400 messages
Active dates: 44 UTC dates
Estimated median S/N: -1.7 dB
Estimated 10th-90th percentile: -12 to +12 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 8, moderate (-15 to -9 dB) 104, strong (≥ -8 dB) 288.

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 SQ4FDK in decoded directed-looking exchanges:

ON1DGN · Belgium ×2 R2EA/P · European Russia ×2 LY1VR · Lithuania ×2 DO1FDK · Fed. Rep. of Germany IK4TVP · Italy TM2WWA · France 9A3K · Croatia DH1FA · Fed. Rep. of Germany DJ0BS · Fed. Rep. of Germany F4ACR · France F4GYM/P · France M7DXP · England

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 SQ4FDK

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: KO14 · 212 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 514 km (approx.)
Last such locator decoded: 2026-09-20 04:24 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	SQ4FDK S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-20 04:24	80m	+5 / +3	SP4DIS	+11 / +4	5	✓ Full exchange observed
09-20 04:15	80m	+16 / -15	F5LMJ	-19 / -10	5	✓ Full exchange observed
09-20 04:13	80m	+17 / -5	UR5ZGY	-6 / -4	2	Partial capture
09-20 04:13	80m	+16 / 0	TF3VS	-3 / 0	5	✓ Full exchange observed
09-20 04:06	40m	- / +2	GJ0KYZ	+2 / -	2	✓ Closing fragment
09-18 19:00	40m	0 / -	ON1DGN	-5 / -5	3	✓ Closing observed
09-18 18:59	40m	0 / -16	US2UM	0 / -5	5	✓ Full exchange observed
09-18 18:57	40m	0 / -	SQ9CXH	- / -3	2	✓ Closing fragment
09-18 18:55	40m	+2 / +6	DL5JMN	+5 / +4	5	✓ Full exchange observed
09-18 18:53	40m	-2 / -	2E0UMK	-10 / -6	3	✓ Closing observed
09-18 18:50	40m	+3 / -13	R2EA/P	+2 / -	5	✓ Closing observed
09-06 07:22	40m	-6 / -	SQ9SZ	- / -	2	Partial capture
09-05 07:02	40m	-2 / -	F4GYM/P	- / -	3	Partial capture
09-01 19:37	40m	-5 / -	UB1AVZ/P	- / -6	3	✓ Closing fragment
09-01 19:36	40m	-8 / -13	HB9DSL	+1 / -7	3	✓ Full exchange observed
09-01 19:35	40m	-8 / -14	UB1CCL	-6 / -	3	✓ Closing observed
08-30 19:21	40m	0 / -	G7RCQ	-13 / -8	5	Partial capture
08-30 19:20	40m	- / -	ON8MA	-20 / -	2	Partial capture
08-27 19:21	40m	+2 / -6	IV3VFP	-2 / -7	4	✓ Full exchange observed
08-26 20:00	20m	- / -1	R6HD	+1 / -	3	✓ Closing fragment
08-24 20:19	40m	-7 / -	JJ1HMR	- / -12	2	✓ Closing fragment
08-24 20:18	40m	-5 / -	RW3DDZ	- / -10	2	✓ Closing fragment
08-24 20:16	40m	-4 / -	JA1QWT	- / -12	2	✓ Closing fragment
08-24 20:15	40m	- / -4	OL900CO	+7 / -	3	Partial capture
08-20 20:15	80m	+14 / -12	IK3ZXW	+2 / -13	3	✓ Full exchange observed
08-20 20:11	80m	+10 / -8	YT1DDL	-4 / -8	4	✓ Full exchange observed
08-20 19:50	40m	+6 / -	R2EA/P	- / -9	4	Partial capture
08-17 04:49	20m	- / +1	R3KCW	-2 / -	3	✓ Closing fragment
08-16 19:39	80m	+3 / -1	LY1VR	+10 / +5	5	✓ Full exchange observed
08-15 19:49	20m	- / -5	F4ACR	+1 / -	3	✓ Closing fragment
08-15 18:23	80m	- / -	RA9CUU	-10 / -	4	Partial capture
08-15 18:21	80m	+13 / -9	RO2E/M	-20 / -5	3	Partial capture
08-15 14:06	40m	-13 / -	<...>	- / -10	2	Partial capture
08-15 04:01	20m	- / -23	5B4AMX	-8 / -	2	Partial capture
08-11 05:23	20m	- / -10	ON1DGN	-19 / -	2	✓ Closing fragment
08-11 05:01	40m	-12 / -	SQ3MQD	-3 / +3	5	✓ Full exchange observed
08-11 04:56	40m	-9 / -	OA4ENG	- / -	2	Partial capture
08-07 21:43	80m	- / -2	F1PBZ	-2 / -	2	Partial capture
08-07 21:43	80m	+9 / -	S56ZIV	-8 / -5	5	✓ Full exchange observed
08-07 21:43	80m	+8 / +6	SN0RWP	+18 / -	3	✓ Closing observed
08-07 21:41	80m	+16 / +10	LB6MJ	-10 / 0	5	✓ Full exchange observed
08-07 21:39	40m	0 / -	G0ANS	-9 / -19	2	✓ Closing observed
08-07 21:37	40m	-8 / -	UN7PPV	- / -6	2	✓ Closing fragment
08-07 21:36	20m	- / -	G3ROY	-20 / -	2	Partial capture
08-04 05:08	40m	- / -6	US0QV	-12 / -	2	Partial capture
08-04 05:06	40m	- / -	UA4FKT	-8 / -	2	✓ Closing fragment
08-03 19:59	80m	+18 / -	EB3JT	- / -14	2	Partial capture
08-03 19:57	80m	+17 / -12	SV3CKF	-9 / -8	6	✓ Full exchange observed
08-03 19:57	80m	+17 / -	SP8NR	+4 / +1	5	✓ Full exchange observed
08-03 19:55	80m	+14 / -	SQ5NO	- / -10	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
041330  -6 1232  SQ4FDK UR5ZGY -05
041330  -4 2051  SQ4FDK TF3VS R+00
041345 +14  673  TF3VS SQ4FDK RR73
041400  -2 2051  SQ4FDK TF3VS 73
041415 +17  673  UR5ZGY SQ4FDK R-04
041500 -15  675  SQ4FDK F5LMJ JN28
041615  +9  674  F5LMJ SQ4FDK -10
041630 -21  676  SQ4FDK F5LMJ R-15
041645 +22  673  F5LMJ SQ4FDK RR73
041700 -22  675  SQ4FDK F5LMJ 73
042430  +3  673  SP4DIS SQ4FDK KO14
042445  +7  333  SQ4FDK SP4DIS +03
042500  +6  673  SP4DIS SQ4FDK R+04
042515 +15  333  SQ4FDK SP4DIS RR73
042530  +5  673  SP4DIS SQ4FDK 73

40m

UTC    dB Audio  Message
185630  +0  708  DL5JMN SQ4FDK RR73
185645  +3 2840  SQ4FDK DL5JMN 73
185700  -1  708  SQ9CXH SQ4FDK -03 (x2)
185830  -6  708  CQ SQ4FDK KO14
185915  +3 1370  SQ4FDK US2UM KO50
185930  -1  708  US2UM SQ4FDK -05
185945  -5 1370  SQ4FDK US2UM R-16
190000  +1  708  US2UM SQ4FDK RR73
190015  +2 1370  SQ4FDK US2UM 73
190030  +1  708  ON1DGN SQ4FDK R-05
190045  -5 1337  SQ4FDK ON1DGN RR73
190100  -2  708  ON1DGN SQ4FDK 73
040630  +2  709  SQ4FDK GJ0KYZ +02 (x2)

20m

UTC    dB Audio  Message
040200  -8 1779  SQ4FDK 5B4AMX -23
194930  +4  705  SQ4FDK F4ACR IN96 (x3)
192430 -24 1562  SQ4FDK DB1EF JO41
044900  -6 1442  SQ4FDK R3KCW KO90 (x3)
091700  +0 2930  SQ4FDK F4GYM/P RR73
194215 +10 1007  SQ4FDK RK3AF RR73
200000  -2  866  SQ4FDK R6HD LN15 (x3)
200300 -12 1208  SQ4FDK F1IQH JN27
191415  -8  932  SQ4FDK M7KSV -10

10m

UTC    dB Audio  Message
060115 +10 2751  SQ4FDK TM2WWA -08 (x2)
191230  -2 2191  SQ4FDK IK4TVP -01 (x2)
191400  +4 2947  SQ4FDK DO1FDK R-14 (x2)
192000 -20 1317  SQ4FDK DN9AD JO52 (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.

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