HB9CZF — FT8 activity observed at SO8OO

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

Receiver-side FT8 activity involving HB9CZF, decoded by SO8OO in southeastern Poland. 580 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, across 5 UTC dates in the available aggregate history. Observed between 2026-08-04 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 580 FT8 messages attributed to HB9CZF as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (76%), followed by 80 m (22%) and 60 m (3%). Most decodes (99%) fell within the six-hour window 17:00-23:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (87%); the estimated median was -3 dB.

Overview

580

Messages attributed

UTC dates decoded

Active 15-min windows

-3 dB

Estimated median S/N

Bands

80m · 126 60m · 15 40m · 439

First attributed message: 2026-08-04
Last attributed message: 2026-09-04 19:11 UTC

Observed FT8 message patterns

Attributed sample: 580 messages
Active dates: 5 UTC dates
Estimated median S/N: -3 dB
Estimated 10th-90th percentile: -10 to +4 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 9, moderate (-15 to -9 dB) 69, strong (≥ -8 dB) 502.

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 HB9CZF in decoded directed-looking exchanges:

JA7AUM · Japan ×2 ER3UA · Moldova ×2 5Z4VJ · Kenya 8Z1IT · Saudi Arabia 9J2FI · Zambia A65D · United Arab Emirates BA4IE · China BA6IM · China BD7OH · China BG0ENS · China BG4UVR · China BH8RDW · China

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 HB9CZF

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 · 37 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 975 km (approx.)
Last such locator decoded: 2026-09-04 18:40 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	HB9CZF S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-04 19:09	80m	+1 / -	RI1FJL	- / -21	5	Partial capture
09-04 18:55	80m	-2 / -	RI1FJL	- / -20	7	Partial capture
09-04 18:50	80m	0 / -	RI1FJL	- / -23	3	Partial capture
09-04 18:44	80m	+5 / -	RI1FJL	- / -14	3	Partial capture
09-04 18:41	80m	+9 / -15	R9WGG	-7 / -4	8	✓ Full exchange observed
09-04 18:39	80m	+10 / -	JG3TRB	- / -25	2	✓ Closing fragment
09-04 18:37	80m	-2 / -18	JA3FYC	-14 / -25	4	✓ Full exchange observed
09-04 18:34	80m	0 / -10	UR5WBO	+2 / -6	4	✓ Full exchange observed
09-04 18:22	80m	+2 / -4	OK7SX	+1 / -22	5	✓ Full exchange observed
09-04 18:15	80m	+4 / -	4L6EZ	- / -4	2	Partial capture
09-04 18:14	80m	+1 / -	JA3FYC	- / -23	2	Partial capture
09-04 18:08	80m	+2 / -	CT2GQA	- / -17	2	Partial capture
09-04 18:02	80m	-6 / -2	EA1IOK	-16 / -8	5	✓ Full exchange observed
09-04 18:02	80m	-7 / -	G4MHJ	- / -13	2	✓ Closing fragment
09-04 17:58	80m	-7 / -	UN3P	- / -12	2	Partial capture
09-04 17:45	80m	-4 / -	DO1FED	-24 / -12	4	✓ Closing observed
09-04 17:42	80m	-1 / -	VK4TUX	- / -25	3	✓ Closing fragment
09-04 17:39	80m	-3 / -	BA5AN	- / -20	3	Partial capture
09-04 17:34	80m	-1 / -	JI3VUB	- / -13	3	Partial capture
09-04 17:30	80m	-1 / -	JI3VUB	- / -20	3	Partial capture
09-04 17:19	80m	- / -21	RK6OZ	+6 / -	3	✓ Closing fragment
09-04 17:18	80m	-12 / -13	9K2HN	-4 / +5	4	✓ Full exchange observed
09-04 17:15	80m	-13 / -	BA5AN	- / -25	3	Partial capture
09-04 17:13	80m	-16 / -	YE4FNN	- / -16	2	Partial capture
09-04 17:10	80m	-14 / -	RA9UFJ	- / -18	2	Partial capture
09-04 16:56	80m	-13 / -	9K2HN	- / -1	3	Partial capture
09-01 18:13	80m	-3 / -	4L6EZ	- / -25	6	Partial capture
09-01 17:49	60m	-12 / -6	ER3UA	-5 / -6	4	✓ Full exchange observed
08-31 18:02	40m	+3 / -	F4LSL	-2 / +4	4	Partial capture
08-31 17:59	40m	+3 / -	RI1FJL	- / -20	4	✓ Closing fragment
08-31 17:49	40m	+5 / -	OK3NKO/P	- / +3	2	Partial capture
08-05 20:56	40m	-4 / -	8Z1IT	- / -14	2	✓ Closing fragment
08-05 20:54	40m	-4 / -	JF0CSK	- / -23	2	✓ Closing fragment
08-05 20:53	40m	-6 / -	PY5NBX	- / -22	3	Partial capture
08-05 20:44	40m	-5 / -	7Z1AL	- / -25	4	Partial capture
08-05 20:41	40m	-4 / +9	OM3PR	-13 / -9	6	✓ Full exchange observed
08-05 20:38	40m	-6 / -	VK2NN	- / -21	4	✓ Closing fragment
08-05 20:36	40m	-2 / -5	DL3MIB	-6 / -10	5	✓ Full exchange observed
08-05 20:34	40m	-7 / -	UN5DK	- / -18	5	✓ Closing fragment
08-05 20:20	40m	-5 / -	HL2ROJ	- / -18	3	✓ Closing fragment
08-05 20:19	40m	-3 / -	EP2AES	- / -24	2	✓ Closing fragment
08-05 20:13	40m	-7 / -	A61OK	- / -22	3	Partial capture
08-05 20:06	40m	-4 / -	UA0LQE	- / -10	10	Partial capture
08-05 19:58	40m	-3 / -	A61OK	- / -22	3	Partial capture
08-05 19:54	40m	-8 / -	R9FE	- / -15	2	✓ Closing fragment
08-05 19:49	40m	-4 / -	UA0JCG	- / -15	2	Partial capture
08-05 19:46	40m	-6 / -	UN9LCW	- / -7	2	Partial capture
08-05 19:43	40m	-7 / -	UA9KBC	- / -15	4	✓ Closing fragment
08-05 19:39	40m	-7 / -	UA9LLE	- / -24	3	✓ Closing fragment
08-05 19:38	40m	-7 / -	UA0LQE	- / -20	5	Partial capture

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
185030  -1 1374  RI1FJL HB9CZF -23 (x15)

60m

UTC    dB Audio  Message
191315  -4 1200  HB9CZF OM5JG 73
191545  -7 1402  DL6LG HB9CZF -05 (x3)
191715  -6 1402  G4ZFJ HB9CZF +04
191730  -1  851  HB9CZF G4ZFJ R+02
191745  -6 1402  G4ZFJ HB9CZF RR73
191800  -2  851  HB9CZF G4ZFJ 73
191815  -8 1402  ON7GB HB9CZF +14 (x2)
191945  -4 1402  F4WCW HB9CZF +06
174915 -11 1404  ER3UA HB9CZF -06
174930  -6 2134  HB9CZF ER3UA R-06
174945 -14 1404  ER3UA HB9CZF RR73
175000  -4 2135  HB9CZF ER3UA 73

40m

UTC    dB Audio  Message
205445  -6 1408  JF0CSK HB9CZF -23 (x2)
205615  -3 1409  8Z1IT HB9CZF RR73 (x2)
174730  +6 1409  UN7BDZ HB9CZF -19
174900  +6 1409  OK3NKO/P HB9CZF +03 (x2)
175945  +2 1409  RI1FJL HB9CZF -20 (x4)
180200  -1 2139  HB9CZF F4LSL JN36 (x2)
180245  +3 1409  F4LSL HB9CZF +04 (x2)

10m

UTC    dB Audio  Message
114100 -20 1901  HB9CZF 5B4AMX R+00

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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