4X4FD — FT8 activity observed at SO8OO

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

Receiver-side FT8 activity involving 4X4FD, decoded by SO8OO in southeastern Poland. 148 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 12 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-09-18.

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 148 FT8 messages attributed to 4X4FD 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 (61%), followed by 40 m (39%). Most decodes (89%) fell within the six-hour window 17:00-23:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9 dB.

Overview

148

Messages attributed

UTC dates decoded

Active 15-min windows

-9 dB

Estimated median S/N

Bands

40m · 57 20m · 91

First attributed message: 2026-06-07
Last attributed message: 2026-09-18 20:12 UTC

Observed FT8 message patterns

Attributed sample: 148 messages
Active dates: 12 UTC dates
Estimated median S/N: -9 dB
Estimated 10th-90th percentile: -22 to -2 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 36, moderate (-15 to -9 dB) 44, strong (≥ -8 dB) 68.

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 4X4FD in decoded directed-looking exchanges:

DL1UDO · Fed. Rep. of Germany ×2 F1PBZ · France 9A6NTK · Croatia DH2RL · Fed. Rep. of Germany DK3HV · Fed. Rep. of Germany DK7MT · Fed. Rep. of Germany EA2BHE · Spain F4JZW · France HA7ST · Hungary LA1SNA · Norway M7MHI · England OK1AYM · Czech Republic

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 4X4FD

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 · 83 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 2,325 km (approx.)
Last such locator decoded: 2026-09-18 20:12 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	4X4FD S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-18 20:35	40m	- / -11	EB1LA	-4 / -	3	✓ Closing fragment
09-18 20:33	40m	- / -24	DL1UDO	-8 / -	4	✓ Closing fragment
09-18 20:17	40m	- / -12	RV3GZ	-6 / -	2	✓ Closing fragment
09-18 20:10	40m	-6 / -9	UA4FKT	-2 / +3	5	✓ Full exchange observed
09-18 20:08	40m	-14 / -	SO5A	- / -12	2	✓ Closing fragment
09-18 20:05	40m	-10 / -	CT1BFP	- / -2	2	✓ Closing fragment
09-18 20:03	40m	-21 / -	TA3TK	-18 / -	3	✓ Closing observed
09-18 20:00	40m	- / -19	UB3BCE	-8 / -	2	Partial capture
09-18 19:56	40m	- / -	S51PV	-6 / -	3	Partial capture
09-18 19:49	40m	- / -17	T77R	+4 / -	4	Partial capture
09-18 19:31	40m	- / -	EB1LA	-8 / -	6	Partial capture
09-18 19:25	40m	- / -	EB1LA	-6 / -	5	Partial capture
09-18 19:23	40m	-19 / -	IT9KXK	-16 / -	3	✓ Closing observed
09-17 18:51	40m	- / -12	GU4WRP	+1 / -	2	✓ Closing fragment
09-17 18:37	40m	- / -14	SV2FNT	-10 / -	2	✓ Closing fragment
09-16 21:18	40m	-6 / -10	G3PMY	-11 / -22	5	✓ Full exchange observed
09-16 21:17	40m	-6 / -	YO6LM	- / -14	2	✓ Closing fragment
09-16 21:14	40m	- / -	DL1ESZ	+2 / -	4	Partial capture
09-16 21:12	40m	-10 / -	JH4BYZ	- / -21	2	✓ Closing fragment
09-16 20:57	40m	-10 / -	F1HSY	-20 / -16	3	✓ Closing observed
09-16 20:55	40m	-13 / -	UA4FKT	+14 / 0	4	Partial capture
09-16 20:49	40m	-10 / -13	4L7T	-5 / -	4	✓ Closing observed
09-16 20:47	40m	- / -	DA0O	-17 / -	3	Partial capture
09-16 20:45	40m	- / -7	RZ6AKF	+10 / -	2	✓ Closing fragment
09-15 20:19	40m	-24 / -	IU3FBL	-3 / -	2	✓ Closing observed
09-15 19:59	40m	- / -14	R5AV	-3 / -	3	✓ Closing fragment
09-15 16:08	40m	- / -19	SV1AVT	-10 / -	2	Partial capture
09-15 16:06	40m	- / -13	RK4UZ	-9 / -	3	✓ Closing fragment
08-28 19:10	20m	-9 / -	OK2MKJ	- / 0	2	Partial capture
08-28 19:06	20m	- / -13	IZ4JMA	-1 / -	2	Partial capture
08-28 19:04	20m	- / -24	IS0KZK	+5 / -	2	Partial capture
08-28 19:00	20m	- / -10	R3TY	+8 / -	3	✓ Closing fragment
08-28 18:50	20m	- / -	G8OO	+2 / -	9	Partial capture
08-28 18:35	20m	- / -	F4MVU	+6 / -	2	Partial capture
08-28 18:26	20m	- / -13	OS4K	+1 / -	2	Partial capture
08-28 18:20	20m	- / -1	DK1GP	-3 / -	5	Partial capture
08-26 20:42	20m	- / -17	SV5BYP	+3 / -	3	✓ Closing fragment
08-26 20:40	20m	-22 / -13	DG5PW	0 / -19	4	Partial capture
08-26 20:34	20m	- / -	RX9ABI	-15 / -	3	Partial capture
08-26 18:25	20m	- / -9	OH2BDW	-14 / -	3	Partial capture
08-26 18:20	20m	-8 / +6	R6ADH	-9 / -7	3	✓ Full exchange observed
08-26 18:18	20m	-7 / -	DL1UDO	- / -12	2	✓ Closing fragment
08-26 18:13	20m	-7 / -9	PD2WL	+19 / -9	3	✓ Full exchange observed
08-26 18:07	20m	- / -	PI4TX	-4 / -	2	Partial capture
08-26 18:05	20m	-4 / -14	PA1JLG	-1 / -	4	✓ Closing observed
08-26 18:03	20m	- / 0	F4JZW	-8 / -	3	✓ Closing fragment
08-26 12:34	20m	-23 / -	GB4LD	- / -	3	Partial capture
08-26 12:34	20m	- / -16	G1LQT	-6 / -	8	Partial capture
08-26 12:30	20m	- / +1	RZ3Z/P	-12 / -	2	✓ Closing fragment
08-26 12:06	20m	- / -11	R4FDW	-7 / -	7	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
201030  -7 2035  UA4FKT 4X4FD +03
201045  -3 2035  4X4FD UA4FKT R-09
201100  -6 2035  UA4FKT 4X4FD RR73
201115  +0 2035  4X4FD UA4FKT 73
201130  -4 2035  CQ 4X4FD KM71 (x2)
201715  -5  410  4X4FD RV3GZ R-12 (x2)
203345 -17 1172  4X4FD DL1UDO JO31 (x4)
203545  -4  897  4X4FD EB1LA IN73 (x3)

20m

UTC    dB Audio  Message
185130  +1 1858  4X4FD G8OO JO02 (x6)
190030 +14  562  4X4FD R3TY LO25 (x3)
190430  +6 2475  4X4FD IS0KZK JM49 (x2)
190600  -1 1587  4X4FD IZ4JMA JN54 (x2)
191045  -6  476  OK2MKJ 4X4FD +00 (x2)

10m

UTC    dB Audio  Message
111315  -2 2487  4X4FD F1PBZ -17 (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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