DF4LB — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Fed. Rep. of Germany Most frequent locator attributed to this token: JO62

Receiver-side FT8 activity involving DF4LB, decoded by SO8OO in southeastern Poland. 131 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 19 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-09-03.

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 131 FT8 messages attributed to DF4LB as the transmitting token by decoded message structure across 19 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (61%), followed by 40 m (25%) and 80 m (14%). Several six-hour UTC windows tied for the largest share (84%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -14 dB.

Overview

131

Messages attributed

UTC dates decoded

Active 15-min windows

-14 dB

Estimated median S/N

Bands

80m · 18 40m · 33 20m · 80

First attributed message: 2026-06-07
Last attributed message: 2026-09-03 10:15 UTC

Observed FT8 message patterns

Attributed sample: 131 messages
Active dates: 19 UTC dates
Estimated median S/N: -14 dB
Estimated 10th-90th percentile: -22 to -6 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 58, moderate (-15 to -9 dB) 54, strong (≥ -8 dB) 19.

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 DF4LB in decoded directed-looking exchanges:

9A2LM · Croatia 9A3MRN · Croatia D2IM · Angola DG5PW · Fed. Rep. of Germany EA5FQ · Spain EA5JLN · Spain EG1UME · Spain EH5FJI · Spain EI2HF · Ireland F1PPH · France F4EDB · France F4HSB · France

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 DF4LB

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: JO62 · 86 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 675 km (approx.)
Last such locator decoded: 2026-09-03 10:15 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	DF4LB S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-03 10:15	40m	-14 / -	PA0AYX	- / -	2	Partial capture
09-03 10:10	40m	-17 / -	OZ9FF	- / -	3	✓ Closing fragment
08-28 10:03	20m	- / -11	UA3AIU	-12 / -	2	✓ Closing fragment
08-26 15:04	20m	- / -15	F1PPH	-6 / -	7	✓ Closing fragment
08-25 21:30	20m	- / -	EI2HF	-14 / -	2	✓ Closing fragment
08-24 21:50	20m	-5 / -	N0SAT	- / -18	3	✓ Closing fragment
08-24 21:02	20m	-14 / -	TF1SH	- / -	2	Partial capture
08-24 20:55	20m	- / -15	D2IM	+6 / -	2	✓ Closing fragment
08-24 18:52	20m	-23 / -18	M0ZJB	-2 / +4	5	✓ Full exchange observed
08-16 18:42	20m	-10 / -	DL70ESSEN	- / -	2	Partial capture
08-10 20:47	40m	-19 / -	JA4TKY	- / -	2	Partial capture
08-04 14:44	20m	-8 / -	OH3CCP	- / -	2	Partial capture
08-04 14:43	20m	-21 / -	GW6HQK	- / -7	2	✓ Closing fragment
08-04 14:29	20m	-18 / -	F4EDB	-11 / -10	2	✓ Closing observed
08-03 19:32	20m	- / -12	9A3MRN	-12 / -	2	✓ Closing fragment
08-03 18:51	20m	-23 / -	5N0YEN	- / -	2	Partial capture
08-01 19:37	40m	- / -9	SM7JKW	-7 / -	2	✓ Closing fragment
08-01 18:56	20m	-22 / -	M9TAM	- / -	3	Partial capture
08-01 18:54	20m	-17 / -	TA3F	- / -	2	Partial capture
08-01 18:52	20m	-16 / -	PY6HD	- / -	4	Partial capture
08-01 18:50	20m	-18 / -	DG5PW	- / +10	2	✓ Closing fragment
08-01 18:48	20m	- / -6	EH5FJI	-14 / -	2	✓ Closing fragment
07-24 19:06	20m	-10 / -	M7OBM	- / -17	4	✓ Closing fragment
07-24 19:00	20m	-14 / -	M7OBM	- / -	2	Partial capture
07-24 18:54	20m	-9 / -	EX8ABR	- / -	3	Partial capture
07-23 21:38	40m	- / -3	IK2YYC	-15 / -	3	✓ Closing fragment
07-23 16:19	40m	-22 / -	F1IEO	- / -	2	Partial capture
07-23 16:16	40m	-18 / -	OZ5THY	- / 0	2	✓ Closing fragment
07-23 16:11	40m	-14 / -6	DL0HAM	+1 / -	6	✓ Closing observed
07-23 16:10	40m	-19 / -	LB6NK	- / -17	2	Partial capture
07-22 18:58	20m	- / -11	G4RCV	-14 / -	2	✓ Closing fragment
07-22 16:12	20m	-12 / -	7Z1DS	- / -	4	Partial capture
07-22 16:11	20m	-14 / -	F4HQB	- / -	2	Partial capture
07-22 16:09	20m	-17 / -	<...>	- / -18	2	Partial capture
07-21 19:48	80m	-8 / -12	DD0AM	-9 / -11	4	✓ Full exchange observed
07-21 19:44	80m	-12 / -1	DB100FT	+2 / -	2	Partial capture
07-21 19:38	80m	+8 / -3	SJ7SOP	-2 / -	6	✓ Closing observed
07-21 19:31	80m	-3 / 0	OH2BVT	0 / 0	5	✓ Full exchange observed
07-21 19:28	80m	-6 / +2	OZ4SOP	-2 / +5	5	✓ Full exchange observed
07-21 19:26	80m	-11 / 0	OL900JAR	+4 / -2	2	Partial capture
07-21 19:07	40m	-14 / -	IN3GHP	- / -10	4	✓ Closing fragment
07-21 19:04	40m	-15 / -	OE8DDX	- / -	3	Partial capture
07-21 17:28	20m	-12 / -	EA5FQ	-16 / 0	4	✓ Closing observed
07-14 18:36	20m	- / -14	TA3ZGR	-17 / -	2	✓ Closing fragment
07-13 09:08	20m	-21 / +6	F4HSB	-22 / -9	3	✓ Full exchange observed
07-13 08:58	20m	-13 / -	9A2LM	- / +6	3	✓ Closing fragment
07-12 19:06	20m	-23 / -	BG7BMG	- / -	2	Partial capture
07-07 18:45	20m	-11 / -	M0LHJ	- / -2	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
213845 -12  959  DF4LB IK2YYC -03 (x3)
193330 -22 1454  <...> DF4LB JO62
193600 -18 1454  SV9QWC DF4LB JO62
193715  -7 2342  DF4LB SM7JKW -09 (x2)
193945 -17 1441  LY1DY DF4LB R+03
204730 -18 1810  JA4TKY DF4LB JO62 (x2)
101030 -15 1701  OZ9FF DF4LB JO62 (x3)
101515 -14 1702  PA0AYX DF4LB JO62 (x2)

20m

UTC    dB Audio  Message
215215  -7 2885  N0SAT DF4LB R-18 (x2)
205215  +3 1462  DF4LB EA5JLN RR73
213045 -16 1951  DF4LB EI2HF +19 (x2)
150400 -11 2332  DF4LB F1PPH JN07 (x7)
100315 -13 1404  DF4LB UA3AIU R-11 (x2)
162245 -23 1837  KE2AQZ DF4LB JO62

80m

UTC    dB Audio  Message
193215  -3  726  DF4LB OH2BVT RR73
193230  -3  635  OH2BVT DF4LB 73
193700  +1 1812  HA3GX DF4LB JO62
193800 +10 2657  SJ7SOP DF4LB JO62 (x3)
193945  +0 2658  DF4LB SJ7SOP -03 (x2)
194030  +7 2657  SJ7SOP DF4LB 73
194430 -12 1080  DB100FT DF4LB JO62
194445  +2 1080  DF4LB DB100FT -01
194845  -9 2598  DD0AM DF4LB JO62
194900  -9 2599  DF4LB DD0AM -12
194915  -5 2598  DD0AM DF4LB R-11 (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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