F4MJX — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: France Most frequent locator attributed to this token: IN88

Receiver-side FT8 activity involving F4MJX, decoded by SO8OO in southeastern Poland. 43 FT8 messages attributed to this token as transmitter, on 60m, 40m, 20m, across 12 UTC dates in the available aggregate history. Observed between 2026-06-20 and 2026-09-19.

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 43 FT8 messages attributed to F4MJX as the transmitting token by decoded message structure across 12 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (74%), followed by 40 m (16%) and 60 m (9%). Most decodes (79%) fell within the six-hour window 16:00-22:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (65%); the estimated median was -18 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-18 dB

Estimated median S/N

Bands

60m · 4 40m · 7 20m · 32

First attributed message: 2026-06-20
Last attributed message: 2026-09-19 21:17 UTC

Observed FT8 message patterns

Attributed sample: 43 messages
Active dates: 12 UTC dates
Estimated median S/N: -18 dB
Estimated 10th-90th percentile: -23 to -9 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 28, moderate (-15 to -9 dB) 12, strong (≥ -8 dB) 3.

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 F4MJX in decoded directed-looking exchanges:

IK4LZH · Italy ×4 OT7K · Belgium ×3 F1PBZ · France F4BHC · France CT1BFP · Portugal DA1ST · Fed. Rep. of Germany EB3JT · Spain EC3A · Spain OE8RPK · Austria PD1ADA · Netherlands R1TM · European Russia R2SN · European Russia

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 F4MJX

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: IN88 · 22 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,799 km (approx.)
Last such locator decoded: 2026-09-19 21:17 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	F4MJX S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-19 21:23	40m	- / -3	OT7K	+8 / -	2	✓ Closing fragment
09-19 21:14	40m	-23 / +2	OT7K	+8 / -	9	✓ Closing observed
09-19 21:11	40m	-18 / -7	DJ0MAB	+4 / -	6	✓ Closing observed
09-19 21:09	40m	-20 / -	SN100PKP	- / +1	2	Partial capture
09-19 21:09	40m	- / -10	II6IALU	-5 / -	5	✓ Closing fragment
09-19 21:07	40m	- / -2	OT7K	+5 / -	2	✓ Closing fragment
09-19 20:49	40m	- / -21	PD4RJ	-14 / -	4	✓ Closing fragment
09-19 20:25	40m	- / -4	ON1DGN	-11 / -	2	✓ Closing fragment
09-16 05:32	80m	- / -15	PA4PA	+2 / -	2	✓ Closing fragment
08-30 05:53	40m	- / -	DL6RS	+5 / -	3	Partial capture
08-07 21:07	20m	- / -13	CT1BFP	-11 / -	7	✓ Closing fragment
08-05 08:57	20m	- / -	EA3HMM	-8 / -	2	Partial capture
08-05 07:20	20m	- / -9	IK4LZH	-8 / -	2	✓ Closing fragment
08-03 08:33	20m	- / -	DL8LTD	-24 / -	2	Partial capture
08-03 07:35	60m	- / -16	DL5SD	-20 / -	2	Partial capture
08-02 19:35	60m	- / +1	DL8UD	+2 / -	6	✓ Closing fragment
08-02 19:26	60m	-19 / -11	IK3/UY7LA	+3 / -2	2	Partial capture
07-28 17:32	20m	- / -14	RU4SS	+5 / -	3	✓ Closing fragment
07-27 13:36	20m	- / -	DL1R	-5 / -	7	Partial capture
07-27 02:05	40m	- / -	R5AV	-10 / -	2	✓ Closing fragment
07-27 01:34	40m	- / -12	UA4FKT	-2 / -	2	Partial capture
07-27 01:29	40m	- / -	EB1LA	-18 / -	2	Partial capture
07-25 19:21	20m	- / +6	IK4LZH	-3 / -	4	✓ Closing fragment
07-21 08:42	10m	- / -7	F4BHC	-18 / -	2	✓ Closing fragment
07-21 08:37	10m	- / -11	F1PBZ	-7 / -	2	✓ Closing fragment
07-21 08:34	10m	- / -18	IU0VOG	-12 / -	3	Partial capture
07-19 05:58	40m	- / -	SQ6EMJ	-11 / -	2	Partial capture
07-17 15:07	20m	-12 / -	UN7IV	- / -	2	Partial capture
07-16 16:18	20m	-9 / -	HB9MZI	- / -2	4	Partial capture
07-16 16:17	20m	-11 / -	PD1DRE	- / -	2	Partial capture
07-15 16:11	20m	-19 / -	IU7VOL	- / -	2	Partial capture
07-13 15:30	20m	- / -	DB1AA	-20 / -	4	Partial capture
07-12 13:22	20m	-16 / -	PD3LKN	-11 / -1	6	Partial capture
07-12 07:16	20m	- / -	R2SN	-22 / -	5	✓ Closing fragment
07-11 20:03	20m	-24 / -16	DJ2MS	-16 / -	2	Partial capture
07-11 18:36	20m	- / -14	R1TM	-8 / -	2	✓ Closing fragment
07-11 18:25	20m	-18 / -	IQ4JO	- / -17	2	Partial capture
07-11 17:33	20m	-22 / -	DL1R	-1 / -6	8	Partial capture
07-11 08:22	20m	- / -	DF4TC	-17 / -	3	Partial capture
07-09 09:30	20m	- / -12	PD1HPB	-21 / -	3	Partial capture
07-09 09:25	20m	- / -13	PD1ADA	-16 / -	2	✓ Closing fragment
07-09 08:11	20m	- / -17	EB3JT	-4 / -	3	✓ Closing fragment
07-08 23:18	40m	- / -	PA0RF	-14 / -	3	✓ Closing fragment
07-08 21:33	40m	- / +7	MW0USK	-2 / -	2	✓ Closing fragment
07-08 21:26	40m	- / -9	EB5AFK	-20 / -	2	✓ Closing fragment
07-08 21:10	40m	- / -12	G1ROK	-18 / -	2	✓ Closing fragment
07-07 20:46	40m	- / -14	IK4LZH	-4 / -	3	✓ Closing fragment
07-07 07:11	40m	- / -15	<...>	-18 / -	4	Partial capture
07-06 22:39	40m	- / -6	ON1BH	-8 / -	2	✓ Closing fragment
07-06 22:36	40m	- / -15	9A3AUH	-15 / -	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
211315  -4 2076  F4MJX II6IALU RR73
211315  +3 1413  F4MJX DJ0MAB -10 (x2)
211400 -18 1823  DJ0MAB F4MJX 73
211445 +13 2133  F4MJX OT7K +02 (x2)
211600 -23 1822  OT7K F4MJX IN88
211615  +8 2133  F4MJX OT7K +02 (x2)
211700 -22 1822  OT7K F4MJX 73 (x2)
211745  +8 2133  F4MJX OT7K +01 (x4)

80m

UTC    dB Audio  Message
053215  +1  260  F4MJX PA4PA -15 (x2)

20m

UTC    dB Audio  Message
072115  -8  462  F4MJX IK4LZH 73
085715  -8  345  F4MJX EA3HMM JN00 (x2)
205430 -24 1853  PA1AMS F4MJX -09
210745 -11 1843  F4MJX CT1BFP IM59 (x7)
211730 -22 1837  RZ4FWA F4MJX 73
125830 -23 1501  DA1ST F4MJX 73
164215 -21 1529  OE8RPK F4MJX 73
171930  -7 1531  EA7R F4MJX IN88

60m

UTC    dB Audio  Message
192300 -21 1765  CQ F4MJX IN88                         a1 (x2)
192400 -21 1765  <...> F4MJX +16
192415  +2 2211  F4MJX TM21TFR R+09
192630 -19 1765  <IK3/UY7LA> F4MJX -02
192715  +3 2348  F4MJX IK3/UY7LA R-11
193500  +0 1461  F4MJX DL8UD +01 (x6)
073545 -20 1762  F4MJX DL5SD JO62 (x2)

10m

UTC    dB Audio  Message
083415 -11 2596  F4MJX IU0VOG JN61 (x3)
083745  -5 2438  F4MJX F1PBZ -11 (x2)
084245 -15 1568  F4MJX F4BHC R-07 (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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