TK4TH — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Corsica Most frequent locator attributed to this token: JN41

Receiver-side FT8 activity involving TK4TH, decoded by SO8OO in southeastern Poland. 241 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, 20m, across 17 UTC dates in the available aggregate history. Observed between 2026-06-23 and 2026-10-02.

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 241 FT8 messages attributed to TK4TH as the transmitting token by decoded message structure across 17 UTC dates in the available aggregate history. The largest monitored-band total was 60 m (53%), followed by 80 m (20%) and 20 m (18%). Several six-hour UTC windows tied for the largest share (93%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -15 dB.

Overview

241

Messages attributed

UTC dates decoded

Active 15-min windows

-15 dB

Estimated median S/N

Bands

80m · 49 60m · 127 40m · 22 20m · 43

First attributed message: 2026-06-23
Last attributed message: 2026-10-02 21:05 UTC

Observed FT8 message patterns

Attributed sample: 241 messages
Active dates: 17 UTC dates
Estimated median S/N: -15 dB
Estimated 10th-90th percentile: -22 to -6 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 118, moderate (-15 to -9 dB) 90, strong (≥ -8 dB) 33.

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 TK4TH in decoded directed-looking exchanges:

YO7CJB · Romania ×2 DF4SZ · Fed. Rep. of Germany DG2SAT · Fed. Rep. of Germany DL1TS · Fed. Rep. of Germany DL5GE · Fed. Rep. of Germany OK1DCM · Czech Republic OK1EP · Czech Republic AA9JC · United States F4HUN · France K4QXX · United States N4IRK · United States VK6KC · Australia

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 TK4TH

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: JN41 · 44 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,363 km (approx.)
Last such locator decoded: 2026-10-02 20:37 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	TK4TH S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-02 21:03	40m	-13 / -	M8RLJ	-13 / -8	4	✓ Full exchange observed
10-02 21:00	40m	-14 / -	DL2EMU	-14 / -12	3	✓ Closing observed
10-02 20:58	40m	-12 / -	RZ4FWA	- / -14	3	Partial capture
10-02 20:44	40m	-11 / -18	G1CEC	-12 / -	5	✓ Closing observed
10-01 19:45	40m	-12 / -	SA7CHI	+4 / -5	7	Partial capture
10-01 19:44	40m	-16 / -	5Q1X	- / -11	2	✓ Closing fragment
10-01 19:44	40m	- / -	OH3CD	-12 / -	2	Partial capture
10-01 19:42	40m	-16 / +2	ON6DL	0 / -	7	✓ Closing observed
10-01 19:41	40m	-16 / -	M7CYY	- / -11	2	✓ Closing fragment
10-01 19:41	40m	- / -18	R6SS	-2 / -	8	✓ Closing fragment
09-30 21:16	60m	- / -	I1JQJ	-7 / -	6	Partial capture
09-30 21:15	60m	-17 / -	OE7FTI	- / 0	2	✓ Closing fragment
09-30 21:14	60m	-9 / -10	EA1MX	-9 / -	4	✓ Closing observed
09-30 21:12	60m	-7 / +3	F4EAR	0 / -	5	✓ Full exchange observed
09-30 21:11	60m	-8 / -19	PE1MMZ	+4 / +10	7	✓ Full exchange observed
09-30 21:10	60m	-15 / -	EA5JKT	-18 / +7	4	✓ Closing observed
09-30 21:10	60m	-14 / -	F5MYK	-11 / -2	4	✓ Closing observed
09-29 20:39	60m	- / -11	LY3W	0 / -	5	✓ Closing fragment
09-29 20:39	60m	- / -	SV1DZB	-14 / -	2	✓ Closing fragment
09-29 20:38	60m	- / -19	SP3JHZ	-5 / -	3	✓ Closing fragment
09-29 20:35	60m	- / -12	YO3APJ	+4 / -	4	✓ Closing fragment
09-29 20:35	60m	- / -	IU1VJP	-16 / -	3	Partial capture
09-29 20:35	60m	- / -22	ON1BD	+6 / -	4	✓ Closing fragment
09-29 20:33	60m	- / -	F4HSB	-24 / -	3	✓ Closing fragment
09-29 20:29	60m	- / -2	PA7PYR	-9 / -	5	✓ Closing fragment
09-29 20:28	60m	- / -8	DF1IH	+6 / -	5	✓ Closing fragment
09-29 20:28	60m	- / -10	ON7PM	-22 / -	3	✓ Closing fragment
09-29 20:28	60m	- / -	YO3APJ	-3 / -	3	Partial capture
09-29 20:26	60m	- / -10	DH7SB	-10 / -	2	✓ Closing fragment
09-29 20:26	60m	- / +2	DL1OBF	+10 / -	4	✓ Closing fragment
09-29 20:26	60m	- / -8	YO2MAX	-17 / -	5	✓ Closing fragment
09-24 21:30	80m	-2 / -	RI1FJZ	- / -	8	Partial capture
09-24 20:37	60m	- / -	SP9BCV	-14 / -	2	Partial capture
09-24 20:31	60m	- / -19	MM0HVU	-11 / -	3	✓ Closing fragment
09-24 20:30	60m	- / -20	SP8AOV	0 / -	2	✓ Closing fragment
09-24 20:27	60m	-17 / -	SV2RYU	-19 / -	2	✓ Closing observed
09-24 20:26	60m	- / +2	DL3TC	-3 / -	3	Partial capture
09-24 20:26	60m	- / -	HG8LXL	-3 / -	2	Partial capture
09-24 20:26	60m	-11 / -5	SV1PLH	-3 / +6	5	✓ Full exchange observed
09-24 20:24	60m	-10 / +3	M0WID	+2 / +6	6	✓ Full exchange observed
09-24 20:24	60m	- / -13	SP5JMA	-1 / -	9	✓ Closing fragment
09-24 20:24	60m	-12 / -8	OH1LA	-11 / -10	4	✓ Full exchange observed
09-01 21:20	80m	-17 / -15	IN3WZS	-10 / +6	11	✓ Full exchange observed
09-01 21:20	80m	-21 / -	DO2SHJ	+6 / -	4	Partial capture
09-01 21:19	80m	- / 0	IK6GTF	-8 / -	3	✓ Closing fragment
09-01 21:17	80m	-10 / +1	DL8LE	+8 / -	6	✓ Closing observed
09-01 21:15	80m	- / -9	IU8TIS	+2 / -	4	✓ Closing fragment
09-01 21:13	80m	- / -21	ON5JV	-16 / -	4	✓ Closing fragment
09-01 21:13	80m	- / -	SP8MZB	+19 / -	2	Partial capture
09-01 21:11	80m	- / -16	LZ2EV	0 / -	5	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
204500 -16 2270  TK4TH G1CEC IO83 (x2)
204545 -11 1226  G1CEC TK4TH RR73
204600 -10 2270  TK4TH G1CEC 73
205815 -13 1437  RZ4FWA TK4TH -14 (x3)
210045 -14 1437  DL2EMU TK4TH -12 (x2)
210200 -14 3040  TK4TH DL2EMU 73
210315 -15 1438  M8RLJ TK4TH -08 (x3)
210430 -13 1437  TK4TH M8RLJ 73
210515 -16 1437  SQ2JYJ TK4TH R-17

60m

UTC    dB Audio  Message
211345  -7 1282  F4EAR TK4TH +11
211400  -1  961  TK4TH F4EAR R+03 (x2)
211430  -8 2651  TK4TH EA1MX IN73 (x2)
211515  -9 1282  EA1MX TK4TH RR73
211530  -9 2651  TK4TH EA1MX 73
211545 -14 1282  OE7FTI TK4TH +00 (x2)
211630 -10  869  TK4TH I1JQJ JN35 (x6)

80m

UTC    dB Audio  Message
212200  -2 1832  TK4TH IN3WZS JN56
212215 -20 1832  IN3WZS TK4TH +11
212230 -12 1832  TK4TH IN3WZS R-15
212245 -14 1832  IN3WZS TK4TH RR73
212300 -11 1833  TK4TH IN3WZS R-15
212315 -16 1832  IN3WZS TK4TH RR73
212330 -11 1832  TK4TH IN3WZS 73
213015  -3 2966  RI1FJZ TK4TH JN41 (x8)

20m

UTC    dB Audio  Message
204245  +3 1295  N4IRK TK4TH -12
204300 -11  437  TK4TH N4IRK R-06
204315  +5 1295  N4IRK TK4TH RR73
204330  -4  437  TK4TH N4IRK 73
204400  -4 2765  TK4TH IW5ALZ JN53
143730  -5  610  VK6KC TK4TH JN41 (x5)
144015 +12  487  TK4TH SV9/PD9VOG R-03
144100  -3  610  F4HUN TK4TH +06
144115  +2  610  TK4TH F4HUN R+00
144130  -7  611  F4HUN TK4TH RR73
144145  +6  610  TK4TH F4HUN 73

160m

UTC    dB Audio  Message
213445 +20  396  TK4TH SP5GW KO12 (x4)

10m

UTC    dB Audio  Message
115515  -7 2310  TK4TH DF4SZ JN58 (x3)
115645 -13 1323  TK4TH DO1OB JN49
115645  -8 2309  TK4TH DF4SZ 73
115815 -12 1324  TK4TH DO1OB JN49 (x3)
120245 -17 1164  TK4TH OK1DCM JN69 (x3)
120445 -24 1565  TK4TH OK1EP 73
120815 -13 1254  TK4TH YU1BD KN04
120945  -9 1252  TK4TH DF3TN JN49 (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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