GD3SKZ — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Isle of Man Most frequent locator attributed to this token: IO74

Receiver-side FT8 activity involving GD3SKZ, decoded by SO8OO in southeastern Poland. 108 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 9 UTC dates in the available aggregate history. Observed between 2026-07-17 and 2026-08-05.

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 108 FT8 messages attributed to GD3SKZ as the transmitting token by decoded message structure across 9 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (60%), followed by 40 m (24%) and 80 m (13%). Several six-hour UTC windows tied for the largest share (90%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -8 dB.

Overview

108

Messages attributed

UTC dates decoded

Active 15-min windows

-8 dB

Estimated median S/N

Bands

80m · 14 40m · 26 20m · 65 10m · 3

First attributed message: 2026-07-17
Last attributed message: 2026-08-05 20:14 UTC

Observed FT8 message patterns

Attributed sample: 108 messages
Active dates: 9 UTC dates
Estimated median S/N: -8 dB
Estimated 10th-90th percentile: -17 to +3 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 18, moderate (-15 to -9 dB) 33, strong (≥ -8 dB) 57.

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 GD3SKZ in decoded directed-looking exchanges:

5B4AMM · Cyprus F1PBZ · France HB9DKM/P · Switzerland IU5RTR · Italy YL2TM · Latvia BA3QIQ · China BA7SAY · China BG7BMG · China BH4ECL · China BI4MPH · China EA6TU · Balearic Islands EX8ABR · Kyrgyzstan

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 GD3SKZ

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: IO74 · 45 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,881 km (approx.)
Last such locator decoded: 2026-08-04 21:24 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	GD3SKZ S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-05 20:13	20m	- / -	EA2DYB	-17 / -	4	Partial capture
08-05 20:10	20m	-8 / -17	GI4TMB	-8 / -20	10	✓ Full exchange observed
08-04 21:26	40m	- / -	PD1AC	-9 / -	4	Partial capture
08-04 21:24	40m	-10 / -	VJ6X	- / -	2	✓ Closing fragment
08-04 21:22	40m	- / -	G4DBW	-16 / -	2	Partial capture
08-04 21:20	40m	- / -	HA7TM	+4 / -	3	Partial capture
08-04 20:51	20m	-22 / -	NV1U	- / -6	2	Partial capture
07-29 21:31	40m	- / -11	HG8IT	-12 / -	2	Partial capture
07-29 21:24	40m	- / -11	HG8IT	-10 / -	3	Partial capture
07-29 21:19	40m	- / -	R2AL	-3 / -	3	Partial capture
07-29 21:19	40m	- / -	RA3WY	-9 / -	2	Partial capture
07-29 21:18	40m	- / -	SM7DXE	-12 / -	5	Partial capture
07-29 21:17	40m	- / -	HA7TM	+4 / -	2	Partial capture
07-29 21:13	40m	-10 / -	7Z1BQ	- / -16	2	✓ Closing fragment
07-29 21:09	40m	- / -	SP6CC	-14 / -	2	Partial capture
07-29 21:09	40m	- / -	SP6EFY	-14 / -	2	Partial capture
07-29 21:08	40m	-6 / -23	R6FX	-16 / -11	8	✓ Full exchange observed
07-29 21:08	40m	- / -	DL1API	-12 / -	3	Partial capture
07-29 21:07	40m	-12 / -	4X5JK	- / -21	4	✓ Closing fragment
07-29 20:48	20m	+2 / -	K1SM	- / -	2	Partial capture
07-29 20:44	20m	- / -1	EC3A	-6 / -	2	Partial capture
07-29 20:43	20m	-14 / -	BA3QIQ	- / -22	2	✓ Closing fragment
07-29 20:42	20m	-8 / -	JR1HFI	- / -8	2	Partial capture
07-29 20:40	20m	-10 / -	VK2BC	- / -	4	Partial capture
07-29 20:39	20m	-8 / -	BH4ECL	- / -9	2	✓ Closing fragment
07-29 20:37	20m	-2 / -	BG7BMG	- / -5	3	✓ Closing fragment
07-29 20:36	20m	-6 / -	BA6CC	- / -	2	Partial capture
07-26 20:37	40m	-6 / -	VK4DAD	- / -	4	Partial capture
07-26 20:32	40m	- / -	R3HH	-5 / -	4	Partial capture
07-26 20:30	40m	-16 / -	VK6BAD	- / -	4	Partial capture
07-26 20:27	40m	-13 / -11	A71XX	-15 / -	2	Partial capture
07-26 20:24	80m	- / -	PA0MUS	-10 / -	4	Partial capture
07-26 20:23	80m	- / -	IK0SME	-9 / -	2	Partial capture
07-26 20:23	80m	- / -13	UA2KU	+9 / -	6	Partial capture
07-26 20:19	80m	- / -14	EA3EDU	-6 / -	6	✓ Closing fragment
07-24 14:53	20m	- / -	DL6EL	-14 / -	2	Partial capture
07-24 14:51	20m	-8 / -	BI8AWT	- / -	2	Partial capture
07-24 14:47	20m	-18 / -	JE3RMQ	- / -22	2	Partial capture
07-24 14:43	20m	-20 / -	R8AGW	-21 / -10	4	Partial capture
07-24 14:43	20m	- / -10	UT4VL	-22 / -	2	Partial capture
07-24 14:42	20m	-20 / -	VK2ZR	- / -24	2	✓ Closing fragment
07-24 14:41	20m	- / -	DL1MKW	+2 / -	2	Partial capture
07-21 20:58	80m	- / -	CT7AUT	-17 / -	3	Partial capture
07-21 20:58	80m	- / -	SP6FME	+10 / -	3	Partial capture
07-21 20:57	80m	+1 / -	VK3KJ	- / -24	2	✓ Closing fragment
07-21 20:57	80m	- / -	DO4FOX	-12 / -	3	Partial capture
07-21 20:55	80m	- / -	RD4AN	-1 / -	13	Partial capture
07-21 20:55	80m	- / -	SP2LLP	+6 / -	2	Partial capture
07-21 20:55	80m	- / -10	UR5ZHJ	+8 / -	6	Partial capture
07-21 20:54	80m	- / -	DO5RBB	-8 / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

20m

UTC    dB Audio  Message
201045 -11  886  GD3SKZ GI4TMB IO74
201045  -3 2034  GD3SKZ EA1R IN73
201115 -11  885  GD3SKZ GI4TMB IO74
201130  -7 2206  GI4TMB GD3SKZ -20
201215  -4  886  GD3SKZ GI4TMB R-17 (x3)
201315  -9 1834  GD3SKZ EA2DYB IN83
201345  -5  886  GD3SKZ GI4TMB R-17
201345 -17 1834  GD3SKZ EA2DYB IN83
201415 -14  885  GD3SKZ GI4TMB R-17
201415 -19 1834  GD3SKZ EA2DYB IN83
201430  -8 2207  GI4TMB GD3SKZ RR73
201445  -6  885  GD3SKZ GI4TMB 73
201445 -23 1835  GD3SKZ EA2DYB IN83

40m

UTC    dB Audio  Message
213145 -12  515  GD3SKZ HG8IT -11 (x2)
212030 -13 2406  CQ GD3SKZ IO74
212045  +1 2406  GD3SKZ HA7TM JN97
212045  -7 2931  GD3SKZ GI7LOU IO64
212115  +5 2406  GD3SKZ HA7TM JN97 (x2)
212215 -16 2210  GD3SKZ G4DBW JO01 (x2)
212445  -8  587  VJ6X GD3SKZ IO74 (x2)
212600 -12  836  GD3SKZ PD1AC JO22 (x4)

80m

UTC    dB Audio  Message
202145  -5  779  GD3SKZ EA3EDU JN01 (x3)
202315 +10 1416  GD3SKZ UA2KU -13
202315 -10 2772  GD3SKZ IK0SME JN61
202415  -9 1770  GD3SKZ PA0MUS JO22
202445  +7 1416  GD3SKZ UA2KU -13
202445 -10 1770  GD3SKZ PA0MUS JO22
202445  -8 2773  GD3SKZ IK0SME JN61
202515 +10 1415  GD3SKZ UA2KU -13
202515  -8 1770  GD3SKZ PA0MUS JO22
202545  +9 1415  GD3SKZ UA2KU -05 (x3)
202645 -13 1770  GD3SKZ PA0MUS JO22

10m

UTC    dB Audio  Message
190915 -14 1089  GD3SKZ DN9RL JO61
190945 -18 1938  GD3SKZ F5RRS JN36
190945  -7 2347  GD3SKZ DN9RL JO61
191045 -23 1938  GD3SKZ F5RRS JN36
191445 -11  841  GD3SKZ HB9CEX JN47
191545 -10 2336  GD3SKZ DN9OPA JN38
191545 -11  847  GD3SKZ DN9EIS JN48
191545 -12 2636  GD3SKZ DG9XN JO52
191615 -10 2336  GD3SKZ DN9OPA JN38
191615  -7  848  GD3SKZ DN9EIS JN48
191645 -17 2336  GD3SKZ DN9OPA JN38 (x2)
191715 -10  849  GD3SKZ DN9EIS JN48 (x2)
195345 -20 1765  GD3SKZ RY6O KN87

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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