F4FCH — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: France Most frequent locator attributed to this token: JN16

Receiver-side FT8 activity involving F4FCH, decoded by SO8OO in southeastern Poland. 183 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 10 UTC dates in the available aggregate history. Observed between 2026-07-01 and 2026-09-16.

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 183 FT8 messages attributed to F4FCH as the transmitting token by decoded message structure across 10 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (58%), followed by 40 m (39%) and 80 m (2%). Several six-hour UTC windows tied for the largest share (51%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (72%); the estimated median was -5 dB.

Overview

183

Messages attributed

UTC dates decoded

Active 15-min windows

-5 dB

Estimated median S/N

Bands

80m · 3 40m · 71 20m · 107 10m · 2

First attributed message: 2026-07-01
Last attributed message: 2026-09-16 22:05 UTC

Observed FT8 message patterns

Attributed sample: 183 messages
Active dates: 10 UTC dates
Estimated median S/N: -5 dB
Estimated 10th-90th percentile: -14 to +4 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 13, moderate (-15 to -9 dB) 39, strong (≥ -8 dB) 131.

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 F4FCH in decoded directed-looking exchanges:

K9STL · United States KE6SU · United States KF0YOB · United States KS0CW · United States LZ3CB · Bulgaria N7GTX · United States OS4K · Belgium PA2KV · Netherlands PD9JPV · Netherlands R4FDD · European Russia RN6MA · European Russia SP9DAT · Poland

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 F4FCH

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: JN16 · 80 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,439 km (approx.)
Last such locator decoded: 2026-09-16 22:03 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	F4FCH S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-16 22:04	40m	+1 / -	LU8FAU	- / -13	3	Partial capture
09-16 22:02	40m	+3 / -1	DL9KM	-15 / +5	3	✓ Full exchange observed
09-16 21:58	40m	-4 / -	BG4UWQ	- / -8	2	✓ Closing fragment
09-16 21:56	40m	-7 / +1	HB9CNU	-15 / -	4	✓ Closing observed
09-16 21:53	40m	-9 / -	BG7BVP	- / -4	2	✓ Closing fragment
09-16 21:47	40m	+12 / -	KP4QVQ	- / -13	3	✓ Closing fragment
09-16 21:45	40m	+7 / -	PY2DPM	- / -9	2	✓ Closing fragment
09-16 21:44	40m	+2 / -	SP9JCN	- / +2	2	✓ Closing fragment
09-16 21:37	40m	+6 / -	YO5IM	- / -2	2	✓ Closing fragment
09-16 21:36	40m	- / -	F4HJG	0 / -	2	Partial capture
09-16 21:33	40m	+8 / -	OZ1LGJ	-10 / +10	4	✓ Closing observed
09-16 21:23	40m	-4 / -	PY7BC	- / -	6	Partial capture
09-16 21:22	40m	-4 / -	VJ6X	- / -4	2	✓ Closing fragment
09-16 21:19	40m	-6 / -	BI8AWT	- / -	3	Partial capture
09-16 21:17	40m	-3 / -	R3AP	- / -3	3	✓ Closing fragment
09-15 21:15	40m	0 / -8	R5AV	-4 / -5	3	✓ Full exchange observed
09-15 21:12	40m	+2 / -	DC9GT	- / -16	2	✓ Closing fragment
09-15 21:11	40m	0 / -8	IK4TVP	-2 / -3	4	✓ Full exchange observed
09-15 21:08	40m	-1 / -	UN7PPV	- / -24	3	✓ Closing fragment
07-26 18:50	10m	-16 / -	PY1USK	- / -	2	Partial capture
07-25 06:27	20m	-1 / -	PD9JPV	- / -5	2	✓ Closing fragment
07-25 06:22	20m	-9 / -	SP9DAT	- / -4	3	✓ Closing fragment
07-25 06:17	20m	-14 / -	W4EIS	- / -3	3	Partial capture
07-25 06:16	20m	-11 / -	G8IXM	-20 / -15	3	Partial capture
07-25 06:16	20m	-14 / -	WB0IWG	- / -16	2	✓ Closing fragment
07-25 06:12	20m	-14 / -	VA6CR	- / -14	5	✓ Closing fragment
07-25 06:03	20m	-8 / -	RN6MA	- / -7	2	✓ Closing fragment
07-25 05:55	20m	-8 / -	OS4K	- / -6	4	✓ Closing fragment
07-25 05:48	20m	-11 / -	N7GTX	- / -14	7	✓ Closing fragment
07-25 05:43	20m	-12 / -	IK8LNE	- / -11	2	Partial capture
07-25 05:41	20m	-8 / -	ZL1VAH	- / -15	2	✓ Closing fragment
07-25 05:37	20m	-1 / -	KC5UZI	- / -	2	Partial capture
07-25 05:35	20m	+1 / -	K0FBI	- / -9	3	Partial capture
07-25 05:33	20m	0 / -	W6PAN	- / -	4	Partial capture
07-25 05:31	20m	-3 / -	K9STL	- / -11	4	✓ Closing fragment
07-24 21:15	20m	-13 / +10	PA2KV	-17 / -11	6	Partial capture
07-24 20:59	20m	-6 / -	KS0CW	- / -6	4	✓ Closing fragment
07-24 20:57	20m	-7 / -	K9STL	- / -	3	Partial capture
07-18 06:07	20m	+1 / +3	LZ3CB	0 / +5	5	✓ Full exchange observed
07-18 05:55	20m	-5 / -	BV3VN	- / -12	4	Partial capture
07-18 05:53	20m	-3 / -	OH6FSO	- / -9	2	Partial capture
07-18 05:48	20m	0 / -	BG5BNW	- / -15	4	Partial capture
07-18 05:44	20m	-4 / -	ZL4TT	- / -15	4	Partial capture
07-18 05:42	20m	+3 / -	BG0GAA	- / -	2	Partial capture
07-18 05:39	20m	-6 / -	KE8ZKN	- / -	2	Partial capture
07-18 05:37	20m	-7 / -	KE6SU	- / -12	3	✓ Closing fragment
07-18 05:35	20m	0 / -	R4FDD	-2 / -6	3	✓ Closing observed
07-18 05:31	20m	+2 / -	YL2TM	- / -2	2	✓ Closing fragment
07-14 05:49	20m	+3 / -	ZL3BWE	- / -	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
215700 -11 2282  BD4VOJ F4FCH RR73
215815 -14 2282  F4FCH HB9CNU R+01
215830 -12 2282  BG4UWQ F4FCH R-08
215900  -7 2282  HB9CNU F4FCH RR73
215930  +4 2282  BG4UWQ F4FCH 73
220030  +0 2282  CQ F4FCH JN16                         a1 (x3)
220200  +3 2282  DL9KM F4FCH +05
220215 -15 1489  F4FCH DL9KM R-01
220230  +3 2282  DL9KM F4FCH RR73
220330  -3 2282  BU2FW F4FCH JN16
220430  +1 2282  LU8FAU F4FCH -13 (x3)

80m

UTC    dB Audio  Message
190930 -11 2093  CQ F4FCH JN16 (x2)
191030  -9 2094  ON7KEI F4FCH -10

20m

UTC    dB Audio  Message
061700 -14 2029  WB0IWG F4FCH RR73
061715 -20 1018  F4FCH G8IXM JO02
061730 -16 2028  W4EIS F4FCH -03 (x3)
061900 -11 2027  G8IXM F4FCH -15
062200  -7 2026  CQ F4FCH JN16
062230  -6 2026  SP9DAT F4FCH -04 (x3)
062530 -11 2025  CQ F4FCH JN16 (x2)
062700  -1 2026  PD9JPV F4FCH -05 (x2)
202430  -8 1667  AB9PM F4FCH JN16

10m

UTC    dB Audio  Message
185015 -14 2063  PY1USK F4FCH JN16 (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.

FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee