ON4LDZ — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Belgium Most frequent locator attributed to this token: JO20

Receiver-side FT8 activity involving ON4LDZ, decoded by SO8OO in southeastern Poland. 199 FT8 messages attributed to this token as transmitter, on 60m, 40m, 20m, 10m, across 11 UTC dates in the available aggregate history. Observed between 2026-07-29 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 199 FT8 messages attributed to ON4LDZ as the transmitting token by decoded message structure across 11 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (82%), followed by 60 m (9%) and 10 m (6%). Most decodes (76%) fell within the six-hour window 16:00-22:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9 dB.

Overview

199

Messages attributed

UTC dates decoded

Active 15-min windows

-9 dB

Estimated median S/N

Bands

60m · 17 40m · 7 20m · 164 10m · 11

First attributed message: 2026-07-29
Last attributed message: 2026-09-18 22:05 UTC

Observed FT8 message patterns

Attributed sample: 199 messages
Active dates: 11 UTC dates
Estimated median S/N: -9 dB
Estimated 10th-90th percentile: -19 to -1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 39, moderate (-15 to -9 dB) 68, strong (≥ -8 dB) 92.

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 ON4LDZ in decoded directed-looking exchanges:

EA1IOK · Spain ×2 EC3A · Spain ×2 ES2AJ · Estonia ×2 MI0JZZ · Northern Ireland ×2 TF4M · Iceland ×2 F1HFP · France ×2 DL1BFF · Fed. Rep. of Germany ×2 DL1UDO · Fed. Rep. of Germany ×2 IW4DNI · Italy YT3PL · Serbia 2E0GKF · England 9A3AUH · Croatia

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 ON4LDZ

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: JO20 · 116 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,194 km (approx.)
Last such locator decoded: 2026-09-18 22:05 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	ON4LDZ S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-19 00:27	80m	- / -11	DL1UDO	-3 / -	2	✓ Closing fragment
09-18 23:55	40m	- / -17	UG4L	-8 / -	2	✓ Closing fragment
09-18 23:47	40m	- / -11	TF1EM	-9 / -	3	Partial capture
09-18 23:14	40m	- / -4	UA4FKT	+11 / -	4	✓ Closing fragment
09-18 23:09	40m	- / -7	R4ZZ	-10 / -	2	✓ Closing fragment
09-18 23:06	40m	- / -16	9K2WA	-13 / -	3	✓ Closing fragment
09-18 22:22	80m	- / -21	G7RAU	-10 / -	2	Partial capture
09-18 22:20	80m	- / -6	DK9WI	+10 / -	3	✓ Closing fragment
09-18 22:12	80m	- / -25	SP6JIU	+25 / -	2	✓ Closing fragment
09-18 22:00	60m	-12 / -	SP3VST	- / -11	2	Partial capture
09-18 21:56	60m	-10 / -	G4XWR	- / -9	2	✓ Closing fragment
09-18 21:52	60m	- / -11	F5HNQ	-9 / -	3	✓ Closing fragment
09-18 21:37	60m	-20 / -20	OH6FSO	-11 / -	5	✓ Closing observed
09-18 21:34	60m	- / -14	EA1IOK	-5 / -	3	✓ Closing fragment
09-18 21:32	60m	-16 / -21	G1BJC	-8 / -1	7	✓ Full exchange observed
09-18 21:27	60m	-14 / -6	F5RMK	-13 / -	6	Partial capture
09-15 20:10	60m	- / 0	F5OZC	-4 / -	2	Partial capture
09-15 20:08	60m	- / -21	OM3PR	-11 / -	5	✓ Closing fragment
09-15 19:13	40m	-10 / -	YO4GIY	- / -	2	Partial capture
09-15 19:11	40m	-12 / -	RV3X	- / -	2	Partial capture
09-15 19:06	40m	-22 / -15	F4HIK	-5 / -	2	Partial capture
08-31 20:42	60m	- / -8	F6HRP	+4 / -	2	✓ Closing fragment
08-29 18:32	20m	-10 / -	EA8BYZ	- / -	2	Partial capture
08-29 18:27	20m	- / -12	DK8HC/P	+10 / -	3	Partial capture
08-29 18:15	20m	- / -23	EA3DVP	+10 / -	5	✓ Closing fragment
08-29 18:04	20m	-6 / +1	EA8UP	+12 / +5	4	✓ Full exchange observed
08-29 17:41	20m	- / -17	EC3A	-3 / -	5	✓ Closing fragment
08-29 17:39	20m	-9 / -	AA3B	- / -	2	Partial capture
08-29 17:30	20m	-10 / -	RX3ASQ	- / +4	2	✓ Closing fragment
08-29 17:19	20m	-17 / -8	AO5FSB	+2 / -	4	✓ Closing observed
08-29 17:06	20m	- / -12	EA8AT	-12 / -	2	✓ Closing fragment
08-29 13:48	20m	- / -2	F6EKI	-9 / -	4	✓ Closing fragment
08-29 13:41	20m	-12 / -	AA3B	- / -	4	Partial capture
08-29 13:35	20m	-13 / -17	RL4R	+22 / +2	8	Partial capture
08-29 13:29	20m	-7 / -9	RM6OS	+10 / -1	4	✓ Full exchange observed
08-29 13:24	20m	-2 / -	RL4R	- / -	3	Partial capture
08-29 13:24	20m	-12 / -	EB3JT	+13 / -13	12	Partial capture
08-28 23:17	20m	- / -3	VE3ARF	-6 / -	2	✓ Closing fragment
08-28 23:00	20m	- / -18	TI5RR	-4 / -	2	✓ Closing fragment
08-28 22:57	20m	- / -9	HJ3ZOM	-6 / -	2	Partial capture
08-28 22:42	20m	- / -20	VE1WT	-14 / -	5	Partial capture
08-28 22:27	20m	- / -6	I5HLK	-20 / -	2	✓ Closing fragment
08-28 22:20	20m	- / -8	K4YT	-2 / -	4	✓ Closing fragment
08-28 22:18	20m	- / +2	KB3Z	-8 / -	2	✓ Closing fragment
08-25 21:30	60m	- / -9	DG5BEA	-14 / -	2	✓ Closing fragment
08-25 21:27	60m	- / -5	F5MYK	-16 / -	3	✓ Closing fragment
08-23 21:07	40m	- / -	9A4ZM	+14 / -	3	Partial capture
08-23 21:06	40m	-11 / -20	G3EFG	+5 / +6	14	Partial capture
08-23 20:59	40m	- / -7	OZ1KZX	+2 / -	2	✓ Closing fragment
08-23 20:46	60m	- / -20	EC3A	-16 / -	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

10m

UTC    dB Audio  Message
154630 -20 1133  ON4LDZ LZ2KV -06 (x2)
155800 -17 2394  IW2CAK ON4LDZ JO20
160230 -17 2394  OE4DJN ON4LDZ R-15
161300 -13 2444  YT3PL ON4LDZ RR73
161300 -21 1459  ON4LDZ IW4DNI RR73
161315 -23 1797  IW4DNI ON4LDZ R-07 (x3)
161630 -20 1797  CQ ON4LDZ JO20
161730 -20 1797  RY6O ON4LDZ -18 (x2)
161930 -20 1797  CQ ON4LDZ JO20 (x2)
120030  -9 1902  ON4LDZ 9K2WA -17

80m

UTC    dB Audio  Message
221200 +25 2832  ON4LDZ SP6JIU -25 (x2)
222015 +11 1993  ON4LDZ DK9WI -06 (x3)
222245  -9 2045  ON4LDZ G7RAU -21 (x2)
002730  +3  990  ON4LDZ DL1UDO -11 (x2)

40m

UTC    dB Audio  Message
230730 -18 1795  ON4LDZ 9K2WA RR73 (x2)
230900 -12 2642  ON4LDZ R4ZZ -07 (x2)
231345 -11  936  ON4LDZ EH3ST RR73
231415  +6 2541  ON4LDZ UA4FKT LO23 (x4)
232600 -12 1380  ON4LDZ SO100PKP -12
234700  -8 1128  ON4LDZ TF1EM -11 (x3)
235500  -8 1673  ON4LDZ UG4L -17 (x2)

60m

UTC    dB Audio  Message
215215 -11 1864  ON4LDZ F5HNQ IN98 (x3)
215345  -7  936  ON4LDZ F/PA2JWN R-16
215400  -9  384  IA5/4O7CC ON4LDZ RR73
215430 -14 2584  CQ ON4LDZ JO20                        a1 (x3)
215600 -10  384  G4XWR ON4LDZ -09 (x2)
215800 -11 2584  CQ ON4LDZ JO20 (x2)
220030 -12 2584  SP3VST ON4LDZ -11 (x2)
220530 -14 2584  CQ ON4LDZ JO20

20m

UTC    dB Audio  Message
180700 -12  629  OE3SGU ON4LDZ R-09
181100 -11 1765  ON4LDZ LZ2CC -02
181545 +17 2567  ON4LDZ EA3DVP -23 (x5)
182230 -13  628  UA3AGW ON4LDZ R+03
182730 +13  628  ON4LDZ DK8HC/P -12 (x3)
183245  -7  628  EA8BYZ ON4LDZ JO20 (x2)
183715 -12  628  R9LM ON4LDZ JO20
190045  -2  757  ON4LDZ IU3MAG RR73

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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