W4DXM — 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: United States Most frequent locator attributed to this token: EL97

Receiver-side FT8 activity involving W4DXM, decoded by SO8OO in southeastern Poland. 3,133 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 48 UTC dates in the available aggregate history. Observed between 2026-07-02 and 2026-10-01.

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 3,133 FT8 messages attributed to W4DXM as the transmitting token by decoded message structure across 48 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (48%), followed by 40 m (47%) and 80 m (5%). Most decodes (93%) fell within the six-hour window 22:00-04:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -10 dB.

Overview

3,133

Messages attributed

UTC dates decoded

254

Active 15-min windows

-10 dB

Estimated median S/N

Bands

80m · 142 40m · 1,474 20m · 1,517

First attributed message: 2026-07-02
Last attributed message: 2026-10-01 00:57 UTC

Observed FT8 message patterns

Attributed sample: 3,133 messages
Active dates: 48 UTC dates
Estimated median S/N: -10 dB
Estimated 10th-90th percentile: -16 to -1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 403, moderate (-15 to -9 dB) 1,363, strong (≥ -8 dB) 1,367.

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 W4DXM in decoded directed-looking exchanges:

N2FSM · United States ×2 PD0DDA · Netherlands ×2 IK2XDE · Italy ×2 LU1BCP · Argentina ×2 5F5OXJ · Morocco 5Z4VJ · Kenya AB2RR · United States AC2Y · United States BA5AW · China DB3EH · Fed. Rep. of Germany DL1LN · Fed. Rep. of Germany DL7RAY · Fed. Rep. of Germany

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 W4DXM

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: EL97 · 1,209 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,549 km (approx.)
Last such locator decoded: 2026-10-01 00:57 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	W4DXM S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-01 00:53	40m	- / -	F4BND	-12 / -	3	Partial capture
10-01 00:49	40m	- / -	M7LYG	-20 / -	2	Partial capture
10-01 00:40	40m	-15 / -	VE3SJJ	- / -19	3	Partial capture
10-01 00:38	40m	- / -	RV6WB	-10 / -	9	Partial capture
10-01 00:35	40m	- / -	RV6WB	-10 / -	2	Partial capture
10-01 00:35	40m	- / -15	TA1EVR	-18 / -	12	Partial capture
10-01 00:34	40m	- / -11	IW2ODG	-8 / -	2	Partial capture
10-01 00:28	40m	-10 / -	N3GTY	- / -11	2	Partial capture
10-01 00:28	40m	- / -	M0IOY	0 / -	2	Partial capture
10-01 00:26	40m	- / -	IU8RFW	-16 / -	3	Partial capture
09-29 01:40	40m	-14 / -	XQ8FGC	- / -17	3	✓ Closing fragment
09-29 01:37	40m	- / -	TA3NK	-5 / -	5	Partial capture
09-29 01:30	40m	-17 / -13	I1RJP	-5 / -12	5	✓ Closing observed
09-29 01:30	40m	- / -13	RC6ZB	+6 / -	2	Partial capture
09-29 01:27	40m	- / -	DK7JR	0 / -	3	Partial capture
09-29 01:21	40m	- / -	M7ISX	-8 / -	2	Partial capture
09-24 21:56	60m	- / -	SP5MIG	-18 / -	2	Partial capture
09-23 01:02	40m	- / -15	UA3PI	+7 / -	2	Partial capture
09-23 00:26	40m	-8 / -	SP9UXS	- / -25	5	✓ Closing fragment
09-23 00:25	40m	- / -	IU8RFW	-7 / -	4	Partial capture
09-23 00:22	40m	-7 / -	PA1CG	- / -21	5	✓ Closing fragment
09-23 00:20	40m	-8 / -	US0QV	- / -20	3	Partial capture
09-23 00:15	40m	- / -	HS0ZKB	-12 / -	2	Partial capture
09-23 00:15	40m	-6 / -	K3UCQ	- / -11	4	✓ Closing fragment
09-23 00:14	40m	-7 / -	CE8TDO	- / -6	2	Partial capture
09-23 00:05	40m	- / -	RV6MX	+2 / -	2	Partial capture
09-22 23:58	40m	- / -	KB4SYV	-13 / -	3	Partial capture
09-22 23:54	40m	- / -	TA3NK	-12 / -	4	Partial capture
09-17 02:11	40m	-16 / -	N2FSM	- / -18	2	✓ Closing fragment
09-17 02:09	40m	-16 / -	KN4WOJ	- / -5	2	✓ Closing fragment
09-17 02:07	40m	- / -	TA2EE	-10 / -	6	Partial capture
09-16 01:29	40m	-21 / -	NE5RO	- / -8	3	✓ Closing fragment
09-16 01:18	40m	-16 / -11	R9OOF	-1 / -19	7	✓ Full exchange observed
09-16 01:18	40m	-18 / -	UA4FKT	- / -21	2	✓ Closing fragment
09-16 01:16	40m	-17 / -	IK4TVP	- / -17	2	✓ Closing fragment
09-16 01:14	40m	-16 / -	KG9OH	- / -21	2	✓ Closing fragment
09-16 01:13	40m	- / -13	F4CQS	-2 / -	2	Partial capture
09-15 01:53	40m	-18 / -	P38IFI	- / -13	3	Partial capture
09-15 01:43	40m	- / -	TA3NK	-2 / -	6	Partial capture
09-15 01:43	40m	- / -	UB4FGK	+3 / -	3	Partial capture
09-13 00:59	40m	- / -16	EA3AKY	0 / -	5	✓ Closing fragment
09-10 00:05	40m	- / -	M9PJC	0 / -	3	Partial capture
09-10 00:04	40m	- / -10	M7YFL	-12 / -	3	Partial capture
09-09 23:55	40m	- / -	M9PJC	-4 / -	3	Partial capture
09-09 23:54	40m	- / -	M0PEL	-2 / -	2	Partial capture
09-08 00:18	40m	- / -	R9LE	-10 / -	2	Partial capture
09-08 00:08	40m	- / -	UR9QQ	-13 / -	3	Partial capture
09-08 00:06	40m	-17 / -	WB3FME	- / -16	2	Partial capture
09-08 00:04	40m	-18 / -	LU6WAV	- / -16	2	✓ Closing fragment
09-07 23:56	40m	- / -	CT7ARQ	-17 / -	6	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
004300 -11 2410  W4DXM RV6WB LN33 (x2)
004745 -12 1007  CQ W4DXM EL97
004830 -13 1120  W4DXM IW0DOI -14
004930 -18 1122  W4DXM M7LYG IO93 (x2)
005245 -16 1232  CQ W4DXM EL97
005315 -20 1232  OA6AFV W4DXM R-16
005330 -13 1169  W4DXM F4BND JN25 (x3)
005645 -15 1232  CQ W4DXM EL97 (x3)
112815  -6 2929  W4DXM SA2ENN KP16

60m

UTC    dB Audio  Message
215600 -18 1567  W4DXM SP5MIG KO02 (x2)

20m

UTC    dB Audio  Message
220030  +0 1952  CQ W4DXM EL97 (x2)
220130  +3 1952  W9ML W4DXM +08
220230  +2 1952  M9LDX W4DXM -13
220300  +3 1952  CQ W4DXM EL97
220315  -4 1952  W4DXM CT2KCK IM59
220330  +3 1952  CQ W4DXM EL97
220345  -5 1953  W4DXM CT2KCK IM59
220400  +5 1952  CQ W4DXM EL97
220415  -1 1953  W4DXM CT2KCK +08
220430  +2 1952  AC2Y W4DXM -07
220445  -2 1953  W4DXM CT2KCK +08
220530  +0 1952  IK2LRF W4DXM -06 (x2)
220630  +1 1952  AC2Y W4DXM RR73

80m

UTC    dB Audio  Message
225030 -15 2102  W4DXM OE2AGZ JN67 (x3)

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.

CW

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

Explore CW reception at SO8OO

FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee