EA4RKC — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Spain Most frequent locator attributed to this token: IM69

Receiver-side FT8 activity involving EA4RKC, decoded by SO8OO in southeastern Poland. 527 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 12 UTC dates in the available aggregate history. Observed between 2026-06-12 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 527 FT8 messages attributed to EA4RKC as the transmitting token by decoded message structure across 12 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (54%), followed by 20 m (46%). Most decodes (56%) fell within the six-hour window 18:00-00:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -13 dB.

Overview

527

Messages attributed

UTC dates decoded

Active 15-min windows

-13 dB

Estimated median S/N

Bands

40m · 285 20m · 242

First attributed message: 2026-06-12
Last attributed message: 2026-09-14 01:40 UTC

Observed FT8 message patterns

Attributed sample: 527 messages
Active dates: 12 UTC dates
Estimated median S/N: -13 dB
Estimated 10th-90th percentile: -19 to -4 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 153, moderate (-15 to -9 dB) 240, strong (≥ -8 dB) 134.

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 EA4RKC in decoded directed-looking exchanges:

CT7AIU · Portugal ×2 EC5M · Spain ×2 F1PBZ · France ×2 IK4LZH · Italy ×2 OE6TNO · Austria ×2 9A2LM · Croatia A61QQ · United Arab Emirates C31BP · Andorra CR2WWA · Azores CT1APP · Portugal DG3YDE · Fed. Rep. of Germany DG4HAD · Fed. Rep. of Germany

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 EA4RKC

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: IM69 · 329 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 2,532 km (approx.)
Last such locator decoded: 2026-09-14 01:39 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	EA4RKC S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-14 01:52	40m	- / -11	IK2TLA	-11 / -	2	✓ Closing fragment
09-14 01:50	40m	- / -7	IW2MYH	0 / -	2	✓ Closing fragment
09-14 01:43	40m	- / -4	4L7T	-4 / -	2	✓ Closing fragment
09-14 01:39	40m	-22 / -	KC0VTJ	- / -	2	Partial capture
09-14 01:15	40m	- / -	RX9ABI	-7 / -	3	Partial capture
09-14 01:09	40m	-21 / -	M3VNI	- / -19	3	Partial capture
09-14 00:32	40m	-19 / -	K3FAW	- / -	2	Partial capture
09-14 00:15	40m	-12 / -	N1NRL	- / -	2	✓ Closing fragment
09-14 00:11	40m	- / -9	G4SRT	+2 / -	2	✓ Closing fragment
09-14 00:09	40m	- / -12	KC1OXG	-11 / -	2	✓ Closing fragment
09-13 23:57	40m	-14 / -	WB9HLA	- / -	2	Partial capture
09-13 23:46	40m	- / -12	GM1TGY	+13 / -	2	✓ Closing fragment
09-13 23:42	40m	- / -15	PA4PA	+6 / -	2	✓ Closing fragment
09-13 23:37	40m	-14 / -	VE2AHG	- / -	2	Partial capture
09-13 23:35	40m	-10 / -	N3JO	- / -	2	Partial capture
09-13 23:33	40m	-13 / -	DG8MPI	- / -18	2	✓ Closing fragment
09-13 23:31	40m	-13 / -	N2GRC	- / -7	2	Partial capture
09-13 23:22	40m	- / +8	EA8CDG	-18 / -	2	Partial capture
09-13 23:20	40m	- / -12	EX7CQ	-8 / -	2	✓ Closing fragment
09-13 22:39	40m	- / -2	M7NXS/P	-1 / -	3	Partial capture
09-13 22:26	40m	- / -11	G8KHF	-6 / -	2	✓ Closing fragment
09-13 22:14	40m	- / -10	RW3YS	-3 / -	2	✓ Closing fragment
09-13 21:53	40m	-11 / -	YO3OBB	- / -12	2	Partial capture
09-13 21:51	40m	-14 / -12	UA3SNB	-11 / -	3	Partial capture
09-13 21:49	40m	- / -11	SV9/SV1ABB	-14 / -	3	Partial capture
09-13 21:48	40m	-13 / -8	MW0DNF	-1 / -	3	✓ Closing observed
09-13 21:41	40m	-11 / -	OZ7DR	- / +3	3	✓ Closing fragment
09-13 21:39	40m	-8 / -	F4HJG	- / -	2	✓ Closing fragment
09-13 21:38	40m	-10 / -	SV1EAG	- / -	2	Partial capture
09-13 21:37	40m	-9 / -9	M0XUE	+6 / -10	4	✓ Full exchange observed
09-13 21:35	40m	-12 / -	7Z1BQ	- / -16	2	Partial capture
09-13 21:33	40m	-10 / -	F3KT	+6 / -9	3	✓ Closing observed
09-13 21:31	40m	-14 / -	F4ACR	- / -	2	✓ Closing fragment
09-13 21:29	40m	-13 / -	R7ZY	- / -	2	Partial capture
09-13 21:27	40m	-10 / -	YO2CIP	- / -22	3	✓ Closing fragment
09-13 21:25	40m	-12 / -	K4RUM	-8 / -14	4	✓ Closing observed
09-13 21:24	40m	-12 / -	EX7CQ	- / -	2	Partial capture
09-13 21:22	40m	- / -14	DH0GSU	-12 / -	2	✓ Closing fragment
09-13 21:21	40m	-12 / -15	DJ5QV	+4 / -14	5	✓ Full exchange observed
09-13 21:19	40m	-10 / -	OZ7DR	- / -16	2	Partial capture
09-13 21:18	40m	-10 / -	SV1EAG	- / -	2	Partial capture
09-13 21:17	40m	-10 / -	IK0MIB	- / -16	3	✓ Closing fragment
09-13 21:14	40m	-10 / -	F4MBU	- / -	2	Partial capture
09-13 21:13	40m	-8 / -	YO2CIP	- / -	2	Partial capture
09-13 21:11	40m	-13 / -	YL2KF	- / -	2	✓ Closing fragment
09-13 21:10	40m	-10 / +2	GW0ARK	-3 / -11	3	Partial capture
09-13 21:08	40m	-12 / -19	M0EGG	-3 / -17	3	Partial capture
09-13 21:06	40m	-15 / -	PD2TX	- / -14	3	✓ Closing fragment
09-13 21:03	40m	-12 / -17	ON1AEY	+10 / -13	4	✓ Full exchange observed
09-13 20:55	40m	-15 / -	GM5SNW	- / -16	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
011530 -10  518  EA4RKC RX9ABI MO05 (x2)
012945 -19 1332  PY1USK EA4RKC IM69
013100 -12  918  EA4RKC EA1AOC IN83
013215 -20 1331  KC4LGM EA4RKC R-14
013245 -22 1331  VE1WT EA4RKC IM69
013915 -23 1331  KC0VTJ EA4RKC IM69 (x2)
014045 -21 1332  WW4OCF EA4RKC R-13
014300  -5 2759  EA4RKC 4L7T -04 (x2)
015030  -7  460  EA4RKC IW2MYH -07 (x2)
015230  -7  906  EA4RKC IK2TLA -11 (x2)

20m

UTC    dB Audio  Message
161345 -23 1576  EA4RKC C31BP RR73
170700  -7  729  EA4RKC A61QQ -10 (x2)
180030 -13  781  OE6HTG EA4RKC IM69
180045  -8 1974  EA4RKC OE6HTG -14
180630 -10  782  Z62NS EA4RKC 73
180700 -11  781  DL4MEW EA4RKC IM69 (x2)
181715  -5  664  EA4RKC IU2GLK -13 (x2)
182400 -19 2307  EA4RKC EA4CTP IM69 (x2)
182830 -10  527  EA4RKC TN8GD RR73
184200 -15  721  EA4RKC PE1NGW -22 (x2)

10m

UTC    dB Audio  Message
092115 -15 1807  EA4RKC F5ADE +00 (x2)
131445  -5  852  EA4RKC I4WQH JN54
131445  -5 2636  EA4RKC F1PBZ -06
131745  -7  851  EA4RKC I4WQH JN54

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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