G4CFS — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: England Most frequent locator attributed to this token: IO91

Receiver-side FT8 activity involving G4CFS, decoded by SO8OO in southeastern Poland. 1,751 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 53 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-09-06.

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 1,751 FT8 messages attributed to G4CFS as the transmitting token by decoded message structure across 53 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (83%), followed by 10 m (10%) and 40 m (7%). Most decodes (59%) fell within the six-hour window 07:00-13:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (81%); the estimated median was -2 dB.

Overview

1,751

Messages attributed

UTC dates decoded

250

Active 15-min windows

-2 dB

Estimated median S/N

Bands

40m · 114 20m · 1,460 10m · 177

First attributed message: 2026-06-07
Last attributed message: 2026-09-06 03:31 UTC

Observed FT8 message patterns

Attributed sample: 1,751 messages
Active dates: 53 UTC dates
Estimated median S/N: -2 dB
Estimated 10th-90th percentile: -11 to +8 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 35, moderate (-15 to -9 dB) 304, strong (≥ -8 dB) 1,412.

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 G4CFS in decoded directed-looking exchanges:

UR5WCS · Ukraine ×2 9A3TF · Croatia ×2 DL9KM · Fed. Rep. of Germany ×2 RN5M · European Russia PD5FL · Netherlands DD0CR · Fed. Rep. of Germany IW4BYK · Italy DD6UVO · Fed. Rep. of Germany OK1DXR · Czech Republic JM1XCW · Japan RA3XFR · European Russia EA6UE · Balearic Islands

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 G4CFS

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: IO91 · 1,331 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,607 km (approx.)
Last such locator decoded: 2026-09-06 03:30 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	G4CFS S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-06 03:30	40m	+2 / -	K0DVH	- / -17	4	✓ Closing fragment
09-06 03:28	40m	-2 / -	HI8JCD	-14 / -9	5	✓ Closing observed
09-06 03:26	40m	+4 / -	J88IH	- / -	2	Partial capture
09-06 03:19	40m	-6 / -	PY7FJ	- / -20	7	Partial capture
09-06 03:16	40m	-2 / -3	CR7BRV	-8 / -14	4	✓ Full exchange observed
09-06 03:15	40m	+2 / -	N1NRL	- / -	3	Partial capture
09-06 03:13	40m	+2 / -	HI3K	- / -	4	Partial capture
09-06 03:11	40m	-2 / -	KA9FOX	- / -15	4	✓ Closing fragment
09-06 03:05	40m	-2 / -6	PV8AJ	-13 / -6	5	✓ Full exchange observed
09-06 03:02	40m	-4 / -	N2SU	- / -8	4	✓ Closing fragment
09-06 02:56	40m	+1 / -	T77NC	- / -3	8	✓ Closing fragment
09-06 02:51	40m	+4 / -	TT1GD	- / -	7	Partial capture
09-06 02:49	40m	+1 / -	KZ4MKJ	- / -	2	Partial capture
08-30 05:50	20m	- / -17	YO3RU	+2 / -	2	✓ Closing fragment
08-30 04:46	20m	- / -6	RL4R	+14 / -	2	Partial capture
08-29 10:47	40m	- / -6	DF5MF	-6 / -	2	✓ Closing fragment
08-29 10:25	40m	- / -1	DC9JVN	-19 / -	3	✓ Closing fragment
08-29 09:55	20m	-10 / -	S56EPX	- / -	2	Partial capture
08-29 09:51	20m	-14 / -	S56EPX	- / -	2	Partial capture
08-29 09:41	20m	- / -9	UF4S	0 / -	2	✓ Closing fragment
08-28 09:48	10m	- / -4	F1PBZ	-4 / -	2	✓ Closing fragment
08-27 08:32	20m	-2 / -	HB9PAE	- / -	2	Partial capture
08-27 08:10	20m	-2 / -	IU3WNP	- / -	2	Partial capture
08-27 08:06	20m	+3 / -	AD9GE	- / -16	3	✓ Closing fragment
08-27 07:56	20m	0 / -	S51DD	- / -	2	Partial capture
08-26 21:06	20m	-7 / -	DL1LDZ	-10 / -13	4	✓ Closing observed
08-26 11:33	20m	+8 / -	SQ5NAP	- / -	2	Partial capture
08-26 11:23	20m	+5 / -	9A3EYA	- / -3	3	✓ Closing fragment
08-26 11:20	20m	+9 / -	DL4LBT	- / -	5	Partial capture
08-26 10:19	20m	+3 / -	RI1FJL	- / -	7	Partial capture
08-26 09:47	20m	-4 / -	RI1FJL	- / -	43	Partial capture
08-26 09:42	20m	0 / -	RI1FJL	- / -	6	Partial capture
08-26 08:41	20m	0 / -7	RN5M	-9 / -14	4	✓ Full exchange observed
08-26 08:32	20m	-4 / -	EB3DBR	- / -2	6	✓ Closing fragment
08-26 08:31	20m	-2 / -9	EA3HKD	-19 / -4	3	✓ Full exchange observed
08-25 08:55	20m	-7 / -	EA2EWL	- / -9	2	✓ Closing fragment
08-25 08:16	20m	+6 / -	CT1END/P	- / -	4	Partial capture
08-25 08:13	20m	+4 / -	EU2Q	- / -6	2	Partial capture
08-25 07:15	20m	- / -17	F1ODM	+14 / -	10	Partial capture
08-25 07:13	20m	+8 / -	UR5WCS	- / -8	3	✓ Closing fragment
08-25 07:12	20m	+6 / +8	IZ2CPP	+15 / -3	5	✓ Full exchange observed
08-24 18:56	20m	-11 / -13	7K1CPT	-9 / -11	2	Partial capture
08-24 16:39	40m	-10 / -	DH0YAH	- / -	2	Partial capture
08-23 21:14	40m	-7 / +6	F5SJC	-7 / -3	7	✓ Full exchange observed
08-23 21:14	40m	-6 / -	ON4MAP	-13 / -	2	✓ Closing observed
08-23 21:11	40m	-4 / -	DL9KM	-4 / -8	5	✓ Closing observed
08-23 21:10	40m	-4 / -2	M8MFU	-10 / -15	4	✓ Full exchange observed
08-23 21:08	40m	-3 / -	PD3JW	- / -8	2	✓ Closing fragment
08-23 21:07	40m	-4 / -	RY3F	- / -3	3	Partial capture
08-23 21:05	40m	-4 / -4	OK7TB	+4 / -7	4	✓ Full exchange observed

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
032145 -11 2686  PY7FJ G4CFS R-20 (x3)
032415  +2 2687  J88IH G4CFS IO91 (x3)
032815  -1 2686  HI8JCD G4CFS IO91 (x3)
032930 -14 2021  G4CFS HI8JCD RR73
032945  -4 2686  HI8JCD G4CFS 73
033015  +1 2686  K0DVH G4CFS IO91 (x4)

20m

UTC    dB Audio  Message
081030  +3 2681  IU3WNP G4CFS IO91 (x2)
083245  -3 2682  HB9PAE G4CFS IO91 (x2)
094100  -4 1291  G4CFS UF4S -09 (x2)
095130 -14 2631  S56EPX G4CFS IO91 (x4)
095730  -7 2835  <...> G4CFS IO91
044615 +15 2166  G4CFS RL4R LO45 (x2)
055045  -1 1638  G4CFS YO3RU -17 (x2)

10m

UTC    dB Audio  Message
115945 -10 2655  G4CFS OK1MAE +12
164945 -13 1028  PY4BSC G4CFS IO91 (x2)
174530 -14  766  PD1B G4CFS 73
174745 -14  766  OZ1AXG G4CFS IO91
180115 -12  768  DG4BRT G4CFS IO91
180415 -13  766  PD0PHA G4CFS R-02
180545 -13  766  HB9EKJ G4CFS R-05
180930 -13  766  F1BAY G4CFS R-01
181115 -13  766  IU5QTD G4CFS R-10
192730  -3 2802  DL8DUL G4CFS IO91
093700 -10 2757  G4CFS IU3UQW R-16
093830 -19 1691  G4CFS IK4TVP +05
094830  -3 2635  G4CFS F1PBZ -04 (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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