4X5DF — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Israel Most frequent locator attributed to this token: KM71

Receiver-side FT8 activity involving 4X5DF, decoded by SO8OO in southeastern Poland. 6 FT8 messages attributed to this token as transmitter, on 20m, across 4 UTC dates in the available aggregate history. Observed between 2026-07-30 and 2026-08-29.

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 6 FT8 messages attributed to 4X5DF as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). In this small sample, the estimated median decoder S/N was -18 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-18 dB

Estimated median S/N

Bands

20m · 6

First attributed message: 2026-07-30
Last attributed message: 2026-08-29 08:42 UTC

Observed FT8 message patterns

Attributed sample: 6 messages
Active dates: 4 UTC dates
Estimated median S/N: -18 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 4, moderate (-15 to -9 dB) 2, strong (≥ -8 dB) 0.

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 4X5DF in decoded directed-looking exchanges:

5Z4VJ · Kenya EA3HKA · Spain IZ8EYN · Italy LZ1ZF · Bulgaria 4X1UF · Israel RA6ANN · European Russia

Most frequent locator attributed to 4X5DF

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: KM71 · 6 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 2,325 km (approx.)
Last such locator decoded: 2026-08-29 08:42 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	4X5DF S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-29 08:42	20m	- / -	IU4QQE	-6 / -	5	Partial capture
08-28 18:35	40m	- / +4	4X1UF	-9 / -	3	✓ Closing fragment
08-07 08:37	20m	- / -	DL1R	-4 / -	8	Partial capture
08-02 15:24	20m	-13 / -4	EA3HKA	-11 / -	3	✓ Closing observed
07-31 17:12	20m	- / -9	IS0KNG	-10 / -	5	Partial capture
07-31 17:12	20m	- / -	F1PPH	-15 / -	10	Partial capture
07-31 17:11	20m	- / -	EA5OS	-4 / -	3	Partial capture
07-31 11:48	20m	- / 0	HA1BF	-7 / -	2	Partial capture
07-30 16:21	20m	- / -	PD3LKN	-14 / -	2	Partial capture
07-30 16:15	20m	- / +5	LZ1ZF	-6 / -	2	✓ Closing fragment
07-30 16:15	20m	- / -	PD3LKN	-18 / -	5	Partial capture
07-30 16:14	20m	- / -2	RN6MA	-10 / -	2	Partial capture
07-30 07:47	20m	- / -3	DL3MIB	-4 / -	9	Partial capture
07-30 06:34	20m	- / -22	RK3AQ	-18 / -	3	Partial capture
07-29 18:17	40m	- / -	9A7BB	-17 / -	3	Partial capture
07-28 15:08	10m	- / +4	5Z4VJ	-12 / -	2	✓ Closing fragment
07-28 14:32	20m	- / -3	IZ8EYN	-9 / -	5	✓ Closing fragment
07-28 14:30	20m	- / -	F4BJN	-5 / -	3	Partial capture
07-27 16:21	20m	- / -	PD3LKN	-19 / -	2	Partial capture
07-16 13:17	20m	- / -	PD3LKN	-16 / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

20m

UTC    dB Audio  Message
083745  -4 2671  4X5DF DL1R JN58 (x8)
084200 -18 1122  CQ 4X5DF KM71
084245  -8 2340  4X5DF IU4QQE JN64 (x5)
075700  +9  491  4X5DF ON5RZ JO21

40m

UTC    dB Audio  Message
162345 -17 1997  4X5DF RG3H KO95
162545 -17 1161  4X5DF RA6ANN 73
181745 -17 1663  4X5DF 9A7BB JN75 (x3)
183545 -11  228  4X5DF 4X1UF +04 (x3)

10m

UTC    dB Audio  Message
150845 -15  885  4X5DF 5Z4VJ R+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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