HB9HJU — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Switzerland Most frequent locator attributed to this token: JN47

Receiver-side FT8 activity involving HB9HJU, decoded by SO8OO in southeastern Poland. 265 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 10 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-08-24.

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 265 FT8 messages attributed to HB9HJU as the transmitting token by decoded message structure across 10 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (70%), followed by 20 m (30%). Most decodes (70%) 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 -17 dB.

Overview

265

Messages attributed

UTC dates decoded

Active 15-min windows

-17 dB

Estimated median S/N

Bands

40m · 185 20m · 80

First attributed message: 2026-06-06
Last attributed message: 2026-08-24 15:14 UTC

Observed FT8 message patterns

Attributed sample: 265 messages
Active dates: 10 UTC dates
Estimated median S/N: -17 dB
Estimated 10th-90th percentile: -23 to -8 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 151, moderate (-15 to -9 dB) 80, strong (≥ -8 dB) 34.

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 HB9HJU in decoded directed-looking exchanges:

SP6WKW · Poland SN4K · Poland MM7FTH · Scotland R6OAG · European Russia IU3QNS · Italy DG1ROL · Fed. Rep. of Germany DL1ASL · Fed. Rep. of Germany F4LHI · France IK2WSA · Italy LA1HW · Norway LZ1DPP · Bulgaria PG1N · Netherlands

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 HB9HJU

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: JN47 · 191 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 975 km (approx.)
Last such locator decoded: 2026-08-24 15:14 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	HB9HJU S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-24 19:35	20m	- / -	E70SZ	+4 / -	4	Partial capture
08-24 15:21	20m	- / -17	F5PLS	-2 / -	3	✓ Closing fragment
08-24 15:09	20m	-9 / -	M9WAL	- / -	5	Partial capture
08-24 15:05	20m	-15 / -	IK4LZH	- / -	2	Partial capture
08-24 14:46	20m	- / -	HB9HWO	-7 / -	2	Partial capture
08-24 14:45	20m	- / -	R7OV	-12 / -	3	Partial capture
08-24 14:37	20m	-10 / -	ON4AOI	- / -	4	Partial capture
08-24 13:49	20m	-14 / -12	GM3AND	-3 / -	10	Partial capture
08-24 12:43	20m	- / -	G5JCC	-12 / -	2	Partial capture
08-24 12:41	20m	- / -13	RN6MA	+6 / -	4	Partial capture
08-24 12:40	20m	- / -	F4BYA	-4 / -	9	Partial capture
08-24 12:37	20m	-15 / -	9A2TN	- / -	3	Partial capture
08-24 12:36	20m	-10 / -	OZ9GA/P	- / -	3	Partial capture
08-24 09:58	20m	-11 / -	EI3JKB	- / -16	4	Partial capture
08-24 09:54	20m	- / -	IS0LYN	-8 / -	3	Partial capture
08-24 09:51	20m	- / -11	RN6MA	+8 / -	4	Partial capture
08-24 09:50	20m	- / -	F4BYA	+3 / -	7	Partial capture
08-24 09:41	20m	- / -14	RN6MA	+14 / -	3	Partial capture
08-24 09:35	20m	- / -2	G5MJF	-10 / -	3	Partial capture
08-24 09:34	20m	-14 / -18	MM7FTH	-6 / -	5	✓ Closing observed
08-24 09:33	20m	-9 / -	F4HTA	- / -	3	Partial capture
07-12 19:55	40m	-23 / -	EA5JXP	- / -	2	Partial capture
07-11 20:24	40m	-20 / -	G0OYQ	-10 / -	2	✓ Closing observed
07-11 20:19	40m	-22 / -	IU2BZV	- / -	2	Partial capture
07-11 20:17	40m	-16 / -10	R7CD	-6 / -24	5	✓ Full exchange observed
07-11 20:13	40m	-16 / +2	OE5ROR	-3 / +2	6	Partial capture
07-11 20:01	40m	-16 / -17	LZ1DPP	-22 / +1	6	✓ Full exchange observed
07-11 20:01	40m	- / -	S51PV	-18 / -	2	Partial capture
07-11 19:54	40m	- / -14	RN6MA	-11 / -	3	Partial capture
07-09 22:13	40m	-17 / -	G3RPF	- / -12	3	Partial capture
07-09 22:08	40m	-18 / -	IK4LZH	-4 / +2	3	Partial capture
07-09 22:08	40m	- / -	R6LPF	-9 / -	2	Partial capture
07-09 22:07	40m	-24 / -1	IU3VQA	-19 / -	4	✓ Closing observed
07-09 22:06	40m	- / -	IQ4JO	+10 / -	2	Partial capture
07-09 22:05	40m	-20 / -	ON4MAP	- / -4	2	✓ Closing fragment
07-09 21:58	40m	- / -	DC2SF	-22 / -	2	Partial capture
07-09 21:58	40m	- / -	IK4LZH	-1 / -	4	Partial capture
07-09 21:51	40m	-20 / -	<...>	- / -	8	Partial capture
07-09 21:01	20m	- / -19	JA4FKX	-17 / -	6	Partial capture
07-09 20:44	20m	- / -4	VO1IV	-19 / -	2	✓ Closing fragment
07-06 20:24	40m	-19 / -	R6OF	- / -	7	Partial capture
07-06 20:22	40m	-22 / -	HB9CYT	-18 / +7	4	✓ Closing observed
07-06 20:20	40m	-21 / -	RD9T	- / -17	3	✓ Closing fragment
06-11 19:56	20m	- / -9	LZ1SAD	-6 / -	4	✓ Closing fragment
06-11 18:31	10m	- / -19	LA1HW	0 / -	3	✓ Closing fragment
06-11 18:26	10m	- / -25	LA2GCA	-10 / -	3	Partial capture
06-11 18:16	40m	-16 / -	SP3AXL	- / -	2	Partial capture
06-11 18:10	40m	-17 / -	EG1PLL	- / -20	6	Partial capture
06-11 18:07	40m	-18 / -	DG4BBK	- / -11	2	✓ Closing fragment
06-11 18:01	40m	-15 / -	UX7QG	- / -	4	Partial capture

Recent FT8 messages decoded at SO8OO

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

20m

UTC    dB Audio  Message
150500 -15 1878  IK4LZH HB9HJU JN47 (x2)
150930 -11 1878  M9WAL HB9HJU JN47 (x5)
151930  -2  634  HB9HJU MW3FLI RR73
152130  -1  478  HB9HJU F5PLS JN25 (x3)
193515  +1 1778  HB9HJU E70SZ JN84 (x4)

40m

UTC    dB Audio  Message
201730 -15 1788  R7CD HB9HJU JN47
201745  -6 1475  HB9HJU R7CD -10
201800 -17 1788  R7CD HB9HJU R-24
201815  -6 1475  HB9HJU R7CD RR73
201830 -17 1788  R7CD HB9HJU 73
201900 -17 1788  CQ HB9HJU JN47
201930 -20 1787  IU2BZV HB9HJU JN47 (x2)
202130 -19 1737  EA7LOK HB9HJU JN47
202430 -20 1738  G0OYQ HB9HJU R+11
202445 -10  770  HB9HJU G0OYQ RR73
202615 -17  996  HB9HJU MM8FKF -10
195415 -15 1189  HB9HJU IU3QNS RR73
195530 -23 1787  EA5JXP HB9HJU JN47 (x2)

10m

UTC    dB Audio  Message
113145 -10 2677  HB9HJU HB9RLZ JN47 (x2)
114645 -15 1405  HB9HJU G7HEB -17 (x2)
182600 -14 1260  HB9HJU LA2GCA R-25 (x3)
183115  +3  489  HB9HJU LA1HW -19 (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.

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