HB9FMN — FT8 activity observed at SO8OO

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

Receiver-side FT8 activity involving HB9FMN, decoded by SO8OO in southeastern Poland. 54 FT8 messages attributed to this token as transmitter, on 80m, 60m, 20m, across 5 UTC dates in the available aggregate history. Observed between 2026-08-27 and 2026-09-19.

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 54 FT8 messages attributed to HB9FMN as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (48%), followed by 60 m (31%) and 20 m (20%). Several six-hour UTC windows tied for the largest share (83%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (80%); the estimated median was 0 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

0 dB

Estimated median S/N

Bands

80m · 26 60m · 17 20m · 11

First attributed message: 2026-08-27
Last attributed message: 2026-09-19 18:34 UTC

Observed FT8 message patterns

Attributed sample: 54 messages
Active dates: 5 UTC dates
Estimated median S/N: 0 dB
Estimated 10th-90th percentile: -14 to +8 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 4, moderate (-15 to -9 dB) 7, strong (≥ -8 dB) 43.

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 HB9FMN in decoded directed-looking exchanges:

J88IH · St. Vincent ×2 3A2MW · Monaco G0AZH · England

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 HB9FMN

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 · 44 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 975 km (approx.)
Last such locator decoded: 2026-09-19 18:34 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	HB9FMN S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-19 18:32	80m	-16 / -	V51WH	- / -	2	Partial capture
09-19 18:24	80m	-13 / -	V51WH	- / -	2	Partial capture
09-19 05:05	60m	- / -14	DK7ZT	-11 / -	2	Partial capture
09-19 05:04	60m	- / -	EA1IOK	-2 / -	5	Partial capture
09-19 05:02	60m	-1 / -	J88IH	- / -22	3	✓ Closing fragment
09-19 04:42	60m	- / -	LZ2VQ	-1 / -	2	Partial capture
09-19 04:41	60m	-3 / -	J88IH	- / -23	4	✓ Closing fragment
09-19 04:37	60m	+1 / -	ZD8GB	- / -	6	Partial capture
09-19 04:34	60m	- / -	EA1IOK	-2 / -	5	Partial capture
09-19 04:34	60m	+1 / -3	G0AZH	-8 / -7	6	✓ Full exchange observed
09-19 04:21	80m	+7 / -	HI8JCD	- / -	10	Partial capture
09-19 04:17	80m	+5 / -	HI8JCD	- / -	4	Partial capture
09-19 04:15	80m	+6 / -	NE5TX	- / -	3	Partial capture
09-04 21:04	80m	+4 / -	RI1FJL	- / -	4	Partial capture
08-29 07:56	20m	-9 / -	YS1GMV	- / -	7	Partial capture
08-29 07:12	20m	-18 / -	YS1GMV	- / -	2	Partial capture
08-28 08:06	20m	-7 / -16	3A2MW	-24 / -	4	✓ Closing observed

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
042115  +6 1545  HI8JCD HB9FMN JN47 (x10)
182445 -15 1551  V51WH HB9FMN JN47 (x5)

60m

UTC    dB Audio  Message
044230  -4 2154  HB9FMN IK4CBO JN54
044300  +0 1577  HB9FMN LZ2VQ KN23
044300 -14 2184  HB9FMN F4GAJ IN99
044315  -1 1576  J88IH HB9FMN R-23 (x5)
050400  -5  481  HB9FMN EA1IOK IN62 (x3)
050500 -13 1902  HB9FMN DK7ZT -14
050530  -1  481  HB9FMN EA1IOK IN62
050530  -9 1902  HB9FMN DK7ZT -14
050600  -4  481  HB9FMN EA1IOK IN62

20m

UTC    dB Audio  Message
064530 -13 1705  RI1ANC HB9FMN JN47
080615 -23 1890  HB9FMN 3A2MW -16 (x3)
080730  -7 1380  3A2MW HB9FMN 73
071230 -19 1610  YS1GMV HB9FMN JN47 (x9)

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.

FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee