F4JJX — reception at SO8OO

Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.

FT8 activity

DXCC entity inferred from callsign: France Most frequent locator attributed to this token: JN09

Receiver-side FT8 activity involving F4JJX, decoded by SO8OO in southeastern Poland. 49 FT8 messages attributed to this token as transmitter, on 80m, across 1 UTC dates in the available aggregate history. Last observed 2026-09-29.

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 49 FT8 messages attributed to F4JJX as the transmitting token by decoded message structure across 1 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (100%). In this small sample, the estimated median decoder S/N was -14 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-14 dB

Estimated median S/N

Bands

80m · 49

First attributed message: 2026-09-29
Last attributed message: 2026-09-29 22:36 UTC

Observed FT8 message patterns

Attributed sample: 49 messages
Active dates: 1 UTC dates
Estimated median S/N: -14 dB
Estimated 10th-90th percentile: -23 to -9 dB
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 20, moderate (-15 to -9 dB) 26, 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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with F4JJX in decoded directed-looking exchanges:

OK1HEH · Czech Republic ×2 9A5E · Croatia DA6VK · Fed. Rep. of Germany DK7ZT · Fed. Rep. of Germany DO1OAS · Fed. Rep. of Germany EA2EWL · Spain EC3A · Spain F5MXH · France HA1BF · Hungary I5HLK · Italy IQ4JO · Italy UA4FKT · European Russia

Most frequent locator attributed to F4JJX

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: JN09 · 16 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,491 km (approx.)
Last such locator decoded: 2026-09-29 22:36 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	F4JJX S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-29 22:35	80m	-11 / -	ON4MAP	- / -	3	Partial capture
09-29 22:32	80m	-17 / -8	I5HLK	-1 / -	4	✓ Closing observed
09-29 22:30	80m	-9 / -	DA6VK	- / -6	2	✓ Closing fragment
09-29 22:29	80m	-11 / -	UX7QV	- / -	3	✓ Closing fragment
09-29 22:25	80m	- / -13	I8OHQ	0 / -	4	Partial capture
09-29 22:25	80m	-8 / -	DK7UY	- / -	2	Partial capture
09-29 22:24	80m	- / -	DO9BAU	+4 / -	12	Partial capture
09-29 22:23	80m	-18 / -10	9A5E	+4 / -	3	✓ Closing observed
09-29 22:21	80m	-16 / -14	EA2EWL	-24 / -6	5	✓ Full exchange observed
09-29 22:21	80m	- / -	F4MZI	-13 / -	6	Partial capture
09-29 22:19	80m	-18 / -7	OK1HEH	+4 / -10	5	✓ Full exchange observed
09-29 22:16	80m	-14 / -19	HA1BF	+11 / -4	4	✓ Full exchange observed
09-29 22:14	80m	- / -	DL3MIB	+12 / -	7	Partial capture
09-29 22:14	80m	- / -10	EC3A	-13 / -	3	✓ Closing fragment
09-29 22:12	80m	-14 / -11	IQ4JO	-3 / -9	5	✓ Full exchange observed
09-29 22:10	80m	-11 / -	YO4NF	+9 / -8	3	✓ Closing observed
09-29 22:09	80m	-22 / -19	UA4FKT	+4 / -1	4	✓ Full exchange observed
09-29 22:06	80m	-16 / -	US2YW	+4 / -4	2	Partial capture
09-29 22:03	80m	-17 / -10	DO1OAS	-5 / -14	9	✓ Full exchange observed
09-29 21:58	80m	-16 / -	F5MXH	-14 / +6	4	✓ Closing observed
09-29 21:57	80m	-24 / -	DK7ZT	+1 / -2	3	✓ Closing observed
09-29 21:57	80m	- / -	DO9BAU	+7 / -	13	Partial capture
09-29 21:57	80m	- / -	ON4MAP	-15 / -	5	Partial capture
09-29 21:54	80m	- / -	EC3A	-18 / -	2	Partial capture
09-29 21:54	80m	- / -	PC2J	-1 / -	4	Partial capture

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
222930 -11 2134  UX7QV F4JJX RRR (x2)
223015 +12 2302  F4JJX DO9BAU JO62
223030  -7 2134  DA6VK F4JJX R-06 (x2)
223130  -8 2134  CQ F4JJX JN09
223145  -4 2736  F4JJX MI0OBC -05
223200 -15 2134  CQ F4JJX JN09
223245  -2 1952  F4JJX I5HLK JN53 (x2)
223330 -16 2134  I5HLK F4JJX RRR (x2)
223515 -11 1442  ON4MAP F4JJX JN09 (x3)

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

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