HB9XBY — FT8 activity observed at SO8OO

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

Receiver-side FT8 activity involving HB9XBY, decoded by SO8OO in southeastern Poland. 4,069 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, 20m, 10m, across 41 UTC dates in the available aggregate history. Observed between 2026-06-09 and 2026-09-04.

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 4,069 FT8 messages attributed to HB9XBY as the transmitting token by decoded message structure across 41 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (70%), followed by 40 m (20%) and 10 m (4%). The busiest six-hour window was 05:00-11:00 UTC, containing 45% of decodes. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9 dB.

Overview

4,069

Messages attributed

UTC dates decoded

389

Active 15-min windows

-9 dB

Estimated median S/N

Bands

80m · 156 60m · 75 40m · 820 20m · 2,838 10m · 180

First attributed message: 2026-06-09
Last attributed message: 2026-09-04 20:43 UTC

Observed FT8 message patterns

Attributed sample: 4,069 messages
Active dates: 41 UTC dates
Estimated median S/N: -9 dB
Estimated 10th-90th percentile: -14 to -2 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 238, moderate (-15 to -9 dB) 2,040, strong (≥ -8 dB) 1,791.

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 HB9XBY in decoded directed-looking exchanges:

M0IEP · England ×10 HA3GX · Hungary ×3 SV9MBH · Crete ×2 HF5A · Poland ×2 OE5FIL · Austria ×2 SP1ZMO · Poland ×2 F4AWT · France ×2 DH3LAT · Fed. Rep. of Germany ×2 OZ1HYM · Denmark ×2 SV5BYP · Dodecanese ×2 K1IR · United States ×2 M9VVE · England ×2

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 HB9XBY

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 · 3,334 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 975 km (approx.)
Last such locator decoded: 2026-09-04 20:43 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	HB9XBY S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-04 20:40	40m	-7 / -	OM1AMT	- / -11	3	✓ Closing fragment
09-04 20:33	40m	+4 / -8	RU4SS	-6 / +5	5	✓ Full exchange observed
09-04 20:26	40m	+5 / -	RI1FJL	- / -22	13	Partial capture
09-04 20:24	40m	0 / -	DL2YMG	-12 / -18	3	✓ Closing observed
09-04 20:20	40m	-5 / -10	F4HSL	-4 / -10	6	✓ Full exchange observed
09-04 20:18	40m	- / -19	RJ6ON	+16 / -	2	Partial capture
09-04 20:17	40m	+4 / -	ON5LC	- / -13	3	✓ Closing fragment
09-04 20:10	40m	-8 / -3	DL6EL	+12 / -8	6	✓ Full exchange observed
09-04 20:07	40m	-2 / +9	DL1HKL	-7 / -10	4	✓ Full exchange observed
09-04 20:00	40m	-2 / -	OH3NDH	- / -21	3	✓ Closing fragment
09-03 20:47	40m	- / -	JA4TKY	-12 / -	2	Partial capture
09-03 20:46	40m	-6 / +3	EA5JLN	-14 / -	4	✓ Closing observed
09-03 20:36	40m	- / -14	JF1UVJ	-7 / -	5	Partial capture
09-03 20:34	40m	-6 / -	F5RAV	-6 / -16	3	✓ Closing observed
09-03 20:32	40m	-6 / -5	DL7UKM	+2 / -16	5	✓ Full exchange observed
09-03 20:28	40m	-12 / -2	DF8RU	+17 / -7	5	✓ Full exchange observed
09-03 20:22	40m	-4 / -	IU3QYU	- / -15	2	✓ Closing fragment
09-03 20:18	40m	- / -	IU3QYU	+2 / -	2	Partial capture
09-03 20:18	40m	-9 / -3	ON1DGN	-15 / -	2	✓ Closing observed
09-03 20:12	40m	0 / -9	M0IEP	-6 / -19	5	✓ Full exchange observed
09-02 19:22	60m	- / -	F1IQH	-8 / -	2	Partial capture
08-28 19:47	40m	- / -13	TA3NK	-3 / -	3	Partial capture
08-28 19:44	20m	-13 / -	RI1FJL	- / -	2	Partial capture
08-28 19:39	20m	- / -8	PD2WL	+1 / -	3	Partial capture
08-28 19:31	20m	- / -	F4BYA	+8 / -	2	Partial capture
08-28 19:30	20m	- / -	TA3NK	-10 / -	6	Partial capture
08-28 09:37	10m	-9 / -	YO4KMU	- / -	4	Partial capture
08-28 08:59	10m	-7 / -	HG1DRC	- / -	7	Partial capture
08-27 11:02	10m	-10 / -	9K2YM	- / -	11	Partial capture
08-27 10:59	10m	-9 / -	5W1SA	- / -	6	Partial capture
08-23 13:19	20m	-6 / -	RW6HPS	- / -15	2	✓ Closing fragment
08-23 08:44	20m	- / -4	RN6LPC	+8 / -	2	✓ Closing fragment
08-23 08:40	20m	- / -	TA3NK	+1 / -	5	Partial capture
08-23 08:38	20m	- / -	2E0FUM	-12 / -	6	Partial capture
08-23 08:36	20m	- / -3	F5OQK	0 / -	2	✓ Closing fragment
08-23 08:32	20m	- / -16	EA5IHI	-17 / -	2	Partial capture
08-21 20:54	40m	- / -19	JA5MHD	-9 / -	3	Partial capture
08-21 20:52	40m	-11 / -	PC9K	- / -11	2	✓ Closing fragment
08-21 20:45	40m	-8 / -	EA2CD	- / -14	2	✓ Closing fragment
08-21 20:44	40m	- / -	CT2GQA	-11 / -	4	Partial capture
08-21 20:40	40m	-6 / -	SP8PLC	- / -14	2	✓ Closing fragment
08-21 20:36	40m	-6 / -	M3ONL	- / -	4	Partial capture
08-21 20:22	40m	- / -8	PD0WC	-12 / -	2	✓ Closing fragment
08-21 20:19	40m	-7 / -	G4YAN	-7 / -5	3	✓ Closing observed
08-21 20:05	40m	- / -	JA5XAE	-15 / -	2	Partial capture
08-21 20:04	40m	- / -	IZ5MMT	+4 / -	2	Partial capture
08-21 19:57	40m	-5 / +2	OK/PE5EIE	-7 / -13	2	Partial capture
08-21 19:55	40m	- / -15	R3ZBR	-7 / -	2	Partial capture
08-21 19:53	40m	-16 / +2	CT2HEX	-3 / -13	4	✓ Full exchange observed
08-21 10:11	20m	-10 / -	M9RPO	- / -11	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
203430  -8 1908  HB9XBY RU4SS 73
203445  +3  643  CQ HB9XBY JN47 (x6)
204015  -6  643  OM1AMT HB9XBY -11 (x3)
204145  -4  643  CQ HB9XBY JN47 (x5)

60m

UTC    dB Audio  Message
054145 -14  838  S57MPU HB9XBY -18 (x2)
054230  +3  744  HB9XBY S57MPU R+01
054245  -5  838  S57MPU HB9XBY RR73
054300  +2  744  HB9XBY S57MPU 73
054315  -6  838  CQ HB9XBY JN47 (x5)
054530 -10  839  HB9XBY IW1GB -03
054545  -5  838  CQ HB9XBY JN47
054700 -18 2175  HB9XBY OE9DAI JN47
192200  -8  739  HB9XBY F1IQH JN27 (x2)

20m

UTC    dB Audio  Message
132330  -3  828  CQ HB9XBY JN47
193000 -13  934  HB9XBY TA3NK KM39
193100  +9 2910  HB9XBY F4BYA JN19
193100 -13  934  HB9XBY TA3NK KM39
193130  +7 2910  HB9XBY F4BYA JN19
193200 -10  934  HB9XBY TA3NK KM39 (x4)
193930  +2 2274  HB9XBY PD2WL -08 (x3)
194245 -12  705  CQ HB9XBY JN47
194415 -16  799  RI1FJL HB9XBY JN47 (x2)

10m

UTC    dB Audio  Message
111215 -12  865  CQ HB9XBY JN47 (x2)
112645 -15  865  JH7AUL HB9XBY -18
120000 -22 1872  HB9XBY DN9SGE R-10
085915  -9  583  HG1DRC HB9XBY JN47 (x7)
093715 -11  582  YO4KMU HB9XBY JN47 (x4)

80m

UTC    dB Audio  Message
225915  -2  634  CQ HB9XBY JN47
225930  +7 2430  HB9XBY IQ4JO JN63
225930  +1  892  HB9XBY DA6HU JN59
225945  +5  634  DA6HU HB9XBY -01
230000  +0  892  HB9XBY DA6HU R+07
230015  -4  634  DA6HU HB9XBY RR73
230030  +6  892  HB9XBY DA6HU 73
230045  +1  634  CQ HB9XBY JN47 (x8)

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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