HB9EXC — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Switzerland Most frequent locator attributed to this token: JN36

Receiver-side FT8 activity involving HB9EXC, decoded by SO8OO in southeastern Poland. 77 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, across 1 UTC dates in the available aggregate history. Last observed 2026-09-30.

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 77 FT8 messages attributed to HB9EXC as the transmitting token by decoded message structure across 1 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (84%), followed by 160 m (9%) and 80 m (6%). In this small sample, the estimated median decoder S/N was -10 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-10 dB

Estimated median S/N

Bands

160m · 7 80m · 5 40m · 65

First attributed message: 2026-09-30
Last attributed message: 2026-09-30 17:50 UTC

Observed FT8 message patterns

Attributed sample: 77 messages
Active dates: 1 UTC dates
Estimated median S/N: -10 dB
Estimated 10th-90th percentile: -18 to -3 dB
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 16, moderate (-15 to -9 dB) 32, strong (≥ -8 dB) 29.

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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with HB9EXC in decoded directed-looking exchanges:

9A4ZM · Croatia DJ0JG · Fed. Rep. of Germany F1PBZ · France IK2EBP · Italy PD2MAC · Netherlands DK7ZT · 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 HB9EXC

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: JN36 · 49 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,158 km (approx.)
Last such locator decoded: 2026-09-30 17:49 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	HB9EXC S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-30 17:49	80m	-3 / +1	DK7ZT	-5 / +2	3	✓ Full exchange observed
09-30 17:48	80m	- / -	9A5E	+8 / -	6	Partial capture
09-30 17:48	80m	- / -	DL9KM	-21 / -	3	Partial capture
09-30 17:48	80m	- / -	E70SZ	+15 / -	3	Partial capture
09-30 17:47	80m	- / -	GX7RAF/P	-19 / -	2	Partial capture
09-30 16:45	40m	-14 / -	PD2MAC	-12 / -11	3	✓ Closing observed
09-30 16:44	40m	- / +6	DK7ZT	-10 / -	2	Partial capture
09-30 16:42	40m	-2 / -	F1PBZ	-14 / -4	3	✓ Closing observed
09-30 16:38	40m	-8 / -1	9A4ZM	-4 / -2	5	✓ Full exchange observed
09-30 16:33	40m	-10 / -	SP9GCZ	- / -	2	Partial capture
09-30 16:30	40m	- / +8	DK7ZT	-6 / -	3	Partial capture
09-30 16:30	40m	- / -	F8VNU	-10 / -	4	Partial capture
09-30 16:30	40m	-2 / +2	IK2EBP	-2 / +8	4	✓ Full exchange observed
09-30 16:00	40m	-9 / -	R3RR	- / -	3	Partial capture
09-30 15:47	40m	-11 / -	UT5ZC	- / -	11	Partial capture
09-30 15:46	40m	- / -20	RA6MQ	+4 / -	2	Partial capture
09-30 15:42	40m	- / -	DL6EL	+2 / -	9	Partial capture
09-30 15:41	40m	- / -	PD2MAC	-11 / -	5	Partial capture
09-30 15:38	40m	- / -1	DK7ZT	-6 / -	4	Partial capture
09-30 15:36	40m	- / -	F6FHZ	-10 / -	2	Partial capture
09-30 15:32	40m	- / -	DG6ITP	-9 / -	4	Partial capture
09-30 15:25	40m	- / -	IU5VLR	-10 / -	3	Partial capture
09-30 15:25	40m	- / -3	DK7ZT	-4 / -	2	Partial capture
09-30 15:25	40m	- / -	DL9KM	-5 / -	7	Partial capture
09-30 15:13	40m	- / -	F6FHZ	-23 / -	2	Partial capture
09-30 15:11	40m	- / -	DL6EL	+3 / -	6	Partial capture
09-30 15:10	40m	- / -	OE3FVU	-13 / -	6	Partial capture
09-30 15:08	40m	- / -	HG8LXL	+2 / -	4	Partial capture
09-30 14:56	40m	- / -	HG8LXL	0 / -	4	Partial capture
09-30 14:54	40m	-11 / -	DJ0JG	- / -	4	✓ Closing fragment
09-30 14:52	40m	- / -	HG8LXL	+4 / -	4	Partial capture
09-30 14:51	40m	- / +1	IW2MLJ	-19 / -	4	Partial capture
09-30 14:49	40m	- / -	DL6EL	0 / -	3	Partial capture
09-30 13:47	40m	- / -2	DK7ZT	-13 / -	4	Partial capture
09-30 13:39	40m	- / -	HG8LXL	-3 / -	7	Partial capture
09-30 13:35	40m	- / -	DK7ZT	-15 / -	3	Partial capture
09-30 13:26	40m	- / +9	DK7ZT	-12 / -	2	Partial capture
09-30 13:25	40m	- / -	OE8PIT	-4 / -	4	Partial capture
09-30 13:25	40m	- / -	SP6AXW	-18 / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
174815 -24 1331  HB9EXC DL9KM JN68
174815  +8 2134  HB9EXC 9A5E JN75 (x2)
174915 +16  389  HB9EXC E70SZ JN84
174915 +11 2134  HB9EXC 9A5E JN75
174930 -11 1593  CQ HB9EXC JN36
174945 +16  389  HB9EXC E70SZ JN84
174945 -19 1331  HB9EXC DL9KM JN68
174945  -5 1592  HB9EXC DK7ZT +01
174945  +3 2134  HB9EXC 9A5E JN75
175000  -5 1593  DK7ZT HB9EXC R+02
175015 -19 1331  HB9EXC DL9KM JN68
175015  +8 2134  HB9EXC 9A5E JN75
175030  -1 1593  DK7ZT HB9EXC 73
175045 +12 2134  HB9EXC 9A5E JN75

160m

UTC    dB Audio  Message
174200 -12  388  CQ HB9EXC JN36 (x7)

40m

UTC    dB Audio  Message
163830  -8 1645  9A4ZM HB9EXC -02
163845  -8 1641  HB9EXC 9A4ZM R-01
163900  -9 1645  9A4ZM HB9EXC RR73
163915  -3 1641  HB9EXC 9A4ZM 73
164130  -7 1645  CQ HB9EXC JN36 (x2)
164230  -1 1645  F1PBZ HB9EXC R-04
164245 -14  488  HB9EXC F1PBZ RR73
164300  -4 1645  F1PBZ HB9EXC 73
164415  +0 2252  HB9EXC DL0HAM +00
164415  -9 1906  HB9EXC DK7ZT +06 (x2)
164515 -12  290  HB9EXC PD2MAC JO22
164630 -17 1644  PD2MAC HB9EXC -11 (x2)

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