F4GTB — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: France Most frequent locator attributed to this token: JN18

Receiver-side FT8 activity involving F4GTB, decoded by SO8OO in southeastern Poland. 3,012 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, 10m, across 25 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-09-22.

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 3,012 FT8 messages attributed to F4GTB as the transmitting token by decoded message structure across 25 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (47%), followed by 80 m (38%) and 20 m (10%). Most decodes (60%) fell within the six-hour window 21:00-03:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (65%); the estimated median was -4.5 dB.

Overview

3,012

Messages attributed

UTC dates decoded

342

Active 15-min windows

-4.5 dB

Estimated median S/N

Bands

160m · 100 80m · 1,150 40m · 1,407 20m · 295 10m · 60

First attributed message: 2026-06-06
Last attributed message: 2026-09-22 00:20 UTC

Observed FT8 message patterns

Attributed sample: 3,012 messages
Active dates: 25 UTC dates
Estimated median S/N: -4.5 dB
Estimated 10th-90th percentile: -16 to +9 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 319, moderate (-15 to -9 dB) 733, strong (≥ -8 dB) 1,960.

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 F4GTB in decoded directed-looking exchanges:

RI1FJZ · Franz Josef Land ×2 AB2RR · United States ×2 SQ6ELK · Poland ×2 9A6NCC · Croatia ×2 N9RNT · United States ×2 UA3AGW · European Russia ×2 W4QLC · United States ×2 DK0ACI · Fed. Rep. of Germany DK9JC · Fed. Rep. of Germany DO1WS · Fed. Rep. of Germany EI3EBB · Ireland M5RJR · 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 F4GTB

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: JN18 · 2,070 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,370 km (approx.)
Last such locator decoded: 2026-09-22 00:20 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	F4GTB S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-22 00:09	40m	+4 / -	RI1FJZ	- / -	21	Partial capture
09-21 23:58	40m	+1 / -	RI1FJZ	- / -	4	Partial capture
09-21 23:45	40m	+4 / -	RI1FJZ	- / -	14	Partial capture
09-21 23:37	40m	0 / -	RI1FJZ	- / -	9	Partial capture
09-21 23:04	40m	+3 / -	RI1FJZ	- / -	13	Partial capture
09-21 22:35	80m	+3 / -	RI1FJZ	- / -25	10	✓ Closing fragment
09-21 21:34	160m	-5 / -	RI1FJZ	- / -23	4	✓ Closing fragment
09-21 20:49	160m	- / -	R4KB	-6 / -	2	Partial capture
09-21 20:47	160m	-9 / -15	R5AV	-6 / -12	4	✓ Full exchange observed
09-21 20:43	160m	-1 / -	RI1FJZ	- / -	4	Partial capture
09-02 02:55	160m	-7 / -	ON6MDG	- / -17	4	✓ Closing fragment
09-02 00:53	160m	- / -	OH3GBW	-12 / -	2	Partial capture
09-02 00:52	160m	+5 / -	M5RJR	-9 / +10	5	✓ Full exchange observed
09-02 00:25	160m	+10 / -	PY2GN	- / -	7	Partial capture
09-02 00:16	160m	+9 / -	LZ2IP	- / -	4	Partial capture
09-01 23:24	160m	- / -	LZ2EV	+2 / -	2	Partial capture
09-01 23:22	160m	-3 / -	LZ2IP	- / -	6	Partial capture
09-01 22:50	160m	-13 / -13	OM3PC	+11 / +9	5	✓ Full exchange observed
09-01 22:26	160m	+6 / -	<...>	- / -13	3	Partial capture
09-01 22:23	160m	- / -	LZ2EV	-5 / -	3	Partial capture
09-01 22:19	160m	-1 / -	LZ2IP	- / -	6	Partial capture
09-01 01:34	160m	-5 / -	NO9E	- / -	2	Partial capture
08-31 23:46	160m	-1 / -	EI3EBB	- / -5	3	✓ Closing fragment
08-31 06:01	80m	-16 / -	<...>	- / -6	2	Partial capture
08-31 05:32	80m	-7 / -	EA7KUH	- / -15	4	✓ Closing fragment
08-31 05:25	80m	-16 / -	KC3SDJ	- / -6	2	✓ Closing fragment
08-31 05:16	80m	-5 / -	EA4HRV	- / -18	6	✓ Closing fragment
08-31 05:04	80m	-6 / -	M3BGE	- / -	3	✓ Closing fragment
08-31 04:38	80m	- / -1	ON1JP	-24 / -	2	Partial capture
08-31 04:35	80m	-8 / -	DA6DE	- / -14	4	✓ Closing fragment
08-31 04:28	80m	- / -	F4IIX	-24 / -	2	Partial capture
08-31 04:25	80m	-4 / -3	SP6TGI	+6 / -	6	✓ Closing observed
08-31 04:12	80m	-10 / -	IZ6BYS	- / -20	5	✓ Closing fragment
08-31 04:08	80m	-14 / -	HC1BG	- / -	2	Partial capture
08-31 03:59	80m	-9 / -	DB5GSS	- / -7	7	✓ Closing fragment
08-31 03:58	80m	-10 / -4	LY1DY	0 / -10	5	✓ Full exchange observed
08-31 03:54	80m	-11 / -	TI2ALF	- / -	4	Partial capture
08-31 03:53	80m	-8 / -	IK6GTF	-17 / +6	4	✓ Closing observed
08-31 03:50	80m	-4 / -	KC3YOI	- / -17	3	✓ Closing fragment
08-31 03:45	80m	-5 / -	N9RNT	- / -18	9	✓ Closing fragment
08-31 03:42	80m	-1 / -	M7YNE	- / -4	3	✓ Closing fragment
08-31 03:41	80m	- / -	F5RRS	-11 / -	4	Partial capture
08-31 03:39	80m	-6 / +1	IU5LQC	-18 / -1	6	✓ Full exchange observed
08-31 03:21	80m	-1 / -	KM5LY	- / -	5	Partial capture
08-31 03:18	80m	-2 / -	XE1PM	- / -	2	Partial capture
08-31 03:12	80m	+5 / -	KA1MR	- / -21	4	✓ Closing fragment
08-31 03:09	80m	- / -	F5RRS	+3 / -	3	Partial capture
08-31 03:08	80m	-10 / -	KC8HI	- / -	2	✓ Closing fragment
08-31 02:59	80m	-15 / -	HC1BG	- / -	7	Partial capture
08-31 02:54	80m	+4 / -	W5JAY	- / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
001245  +7 2056  RI1FJZ F4GTB JN18 (x15)

80m

UTC    dB Audio  Message
053330  -5 2543  EA7KUH F4GTB 73
055730 -13 1258  KB1XP F4GTB JN18
060100 -18 1103  <...> F4GTB JN18 (x2)
082030 -15 2500  G3AKA F4GTB JN18
223545  +6 1539  RI1FJZ F4GTB JN18 (x10)

160m

UTC    dB Audio  Message
204315  -1  788  RI1FJZ F4GTB JN18 (x4)
204715 -11 1274  CQ F4GTB JN18                         a1
204730  -7 1273  F4GTB R5AV -15
204745  -9 1304  R5AV F4GTB R-12
204800  -5 1304  F4GTB R5AV RR73
204815  -9 1304  R5AV F4GTB 73
204930  -4  484  F4GTB R4KB LO53 (x2)
213415  -5 1304  RI1FJZ F4GTB JN18 (x4)

20m

UTC    dB Audio  Message
181715  -7 2581  NA4CN F4GTB JN18 (x3)
182045  -6  534  TN8GD F4GTB JN18
182145 -17 1302  KF8BRK F4GTB JN18
184430 -11 2632  N3GMN F4GTB JN18 (x6)
185300 -20 1161  <...> F4GTB JN18
190700 -18 2275  KN4WRX F4GTB JN18
192345 -24 1332  WB7SWW F4GTB JN18 (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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