F4MCJ — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: France Most frequent locator attributed to this token: JN14

Receiver-side FT8 activity involving F4MCJ, decoded by SO8OO in southeastern Poland. 72 FT8 messages attributed to this token as transmitter, on 40m, across 4 UTC dates in the available aggregate history. Observed between 2026-09-10 and 2026-09-13.

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 72 FT8 messages attributed to F4MCJ as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (100%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -10 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-10 dB

Estimated median S/N

Bands

40m · 72

First attributed message: 2026-09-10
Last attributed message: 2026-09-13 20:50 UTC

Observed FT8 message patterns

Attributed sample: 72 messages
Active dates: 4 UTC dates
Estimated median S/N: -10 dB
Estimated 10th-90th percentile: -20 to -2 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 15, moderate (-15 to -9 dB) 24, 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 F4MCJ in decoded directed-looking exchanges:

DL7ACA · Fed. Rep. of Germany F1IQH · France HA3HA · Hungary HB9ZHK · Switzerland IZ8PPI · Italy M0BEW · England M0EGG · England MM0DXL · Scotland MW9LQA · Wales OM1AMT · Slovak Republic ON1BH · Belgium OS4K · Belgium

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 F4MCJ

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: JN14 · 36 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,537 km (approx.)
Last such locator decoded: 2026-09-13 20:45 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	F4MCJ S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-13 20:50	40m	-7 / -	HA3HA	- / +5	2	✓ Closing fragment
09-13 20:45	40m	0 / -17	R5AV	-8 / -3	3	✓ Full exchange observed
09-13 20:43	40m	-6 / -	OM1AMT	- / -3	2	✓ Closing fragment
09-13 20:41	40m	-1 / -	IZ8PPI	-13 / -11	3	✓ Closing observed
09-13 20:36	40m	-8 / -	ON1BH	-3 / -	3	✓ Closing observed
09-13 20:35	40m	-8 / -3	M0BEW	+2 / -	4	✓ Full exchange observed
09-13 20:35	40m	-9 / -19	RW1CW	-14 / -	6	✓ Closing observed
09-12 21:21	40m	- / -	S57BTI	+6 / -	2	Partial capture
09-12 21:20	40m	-24 / -	M0EGG	- / -1	2	✓ Closing fragment
09-12 21:13	40m	- / -	EA3AAY	-12 / -	2	Partial capture
09-12 21:03	40m	-13 / -	MW9LQA	-10 / -6	4	✓ Closing observed
09-12 20:56	40m	- / -	DL7ACA	+3 / -	2	✓ Closing fragment
09-10 23:16	40m	-15 / -	W1JJC	- / -	2	Partial capture
09-10 23:06	40m	-14 / -	UR4QWW	- / -12	3	✓ Closing fragment
09-10 22:50	40m	-8 / -6	SQ2JDM	-7 / -1	5	✓ Full exchange observed
09-10 22:39	40m	-14 / -	RX3ASQ	-17 / -18	2	Partial capture
09-10 22:34	40m	-6 / -14	SP1NL	+1 / -6	6	✓ Full exchange observed
09-10 22:32	40m	-7 / -	SP7TF	- / +7	2	✓ Closing fragment
09-10 22:27	40m	-16 / -	UA2FFD	- / -	2	Partial capture
09-10 22:23	40m	-4 / -	SV8/F6BLP	- / -8	3	Partial capture
09-10 22:15	40m	-24 / -11	LZ1ZF	-10 / -	2	Partial capture
09-10 22:03	40m	- / -24	MM0DXL	-18 / -	2	✓ Closing fragment
09-10 21:52	40m	-20 / -	SP6FME	- / -	2	Partial capture
09-10 21:37	40m	- / -5	OS4K	-14 / -	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
204130 -13 1531  F4MCJ IZ8PPI RRR
204145  -3  360  IZ8PPI F4MCJ 73
204215 -13  360  CQ F4MCJ JN14                         a1 (x3)
204345 -11  360  OM1AMT F4MCJ -03 (x2)
204515  +3  360  CQ F4MCJ JN14
204530  -8  360  F4MCJ R5AV -17
204545  -1  360  R5AV F4MCJ R-03 (x2)
204645  -2  360  SH5RJX F4MCJ -02
204845  -8  360  SP3JHZ F4MCJ RR73
205015  -7  360  HA3HA F4MCJ R+05 (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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