HB9CNU — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Switzerland Most frequent locator attributed to this token: JN37

Receiver-side FT8 activity involving HB9CNU, decoded by SO8OO in southeastern Poland. 816 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 28 UTC dates in the available aggregate history. Observed between 2026-07-02 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 816 FT8 messages attributed to HB9CNU as the transmitting token by decoded message structure across 28 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (46%), followed by 20 m (42%) and 10 m (12%). Several six-hour UTC windows tied for the largest share (46%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -10.4 dB.

Overview

816
Messages attributed
28
UTC dates decoded
140
Active 15-min windows
-10.4 dB
Estimated median S/N

Bands

40m · 376 20m · 342 10m · 98
First attributed message: 2026-07-02
Last attributed message: 2026-09-19 22:33 UTC

Observed FT8 message patterns

Attributed sample
816 messages
Active dates
28 UTC dates
Estimated median S/N
-10.4 dB
Estimated 10th-90th percentile
-19.9 to +1.7 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 213, moderate (-15 to -9 dB) 259, strong (≥ -8 dB) 344.

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 HB9CNU in decoded directed-looking exchanges:

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 HB9CNU

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
JN37 · 358 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,116 km (approx.)
Last such locator decoded
2026-09-19 22:32 UTC

Other locator fields attributed to this token: JN56 (1).

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 UTCBandHB9CNU S/NCounterpartCounterpart S/NMsgsCapture
09-19 22:32 40m -3 / - M9STN - / +8 3 ✓ Closing fragment
09-19 22:27 40m -1 / - CT2JAE -6 / +5 8 ✓ Closing observed
09-19 22:22 40m -1 / - SQ6FHT - / -3 3 ✓ Closing fragment
09-19 21:52 40m -2 / - MW3LSG - / -10 3 ✓ Closing fragment
09-19 21:51 40m -10 / - TA7MMI - / - 2 Partial capture
09-19 21:42 40m - / - TA2EE -10 / - 7 Partial capture
09-19 21:41 40m 0 / - G7VNN - / -4 2 Partial capture
09-19 21:36 40m +8 / -14 II9IABJ +9 / -6 4 Partial capture
09-19 21:34 40m +5 / - G4FHL -7 / +10 4 ✓ Full exchange observed
09-19 21:31 40m +8 / +9 LB8TG -6 / - 5 ✓ Full exchange observed
09-19 21:29 40m +1 / - DJ1JAY - / +5 3 ✓ Closing fragment
09-19 21:27 40m 0 / -7 M0EBM -17 / +4 4 ✓ Full exchange observed
09-18 21:18 40m -20 / -14 IR0IADU -14 / -2 3 Partial capture
09-18 21:16 40m - / - UA4FKT +8 / - 2 Partial capture
09-18 21:09 40m -10 / +4 OZ1NIB -3 / - 2 Partial capture
09-18 21:04 40m +5 / - DK5CR/QRP - / -10 4 Partial capture
09-18 21:01 40m -2 / - SP1ZBRS - / -1 2 Partial capture
09-18 20:55 40m +1 / - V51WH -11 / +2 6 ✓ Closing observed
09-18 20:53 40m 0 / - R3RRC/P - / -6 3 Partial capture
09-18 20:49 40m -4 / -10 GM0HTT -4 / - 4 ✓ Closing observed
09-18 20:46 40m +2 / - F8MRQ 0 / +2 5 Partial capture
09-18 20:44 40m +4 / - M0PRW - / +1 4 ✓ Closing fragment
09-18 20:43 40m +3 / - M8SXK - / - 2 Partial capture
09-18 20:42 40m -2 / - UT8SQ - / +2 2 ✓ Closing fragment
09-18 20:39 40m +4 / 0 M0WID -3 / - 5 ✓ Full exchange observed
09-16 22:35 40m -14 / -21 AA1AC -14 / +2 4 ✓ Full exchange observed
09-16 22:28 40m -14 / -19 AA1AC -13 / -1 7 Partial capture
09-16 22:13 40m -12 / - A41DV - / -2 2 ✓ Closing fragment
09-16 22:11 40m -14 / - JY5IB - / +1 2 ✓ Closing fragment
09-16 22:06 40m -12 / - K1UHF - / -10 3 ✓ Closing fragment
09-16 22:00 40m -10 / -16 G0RWF +4 / +8 6 ✓ Full exchange observed
09-16 21:56 40m -15 / - F4FCH -7 / +1 4 ✓ Closing observed
09-16 21:53 40m -8 / - OK1SI - / +1 2 Partial capture
09-16 21:50 40m -11 / - SP2ZST - / -1 2 Partial capture
09-16 21:48 40m -12 / - M7YFL - / - 2 Partial capture
09-16 21:44 40m -14 / -12 MW7GQB -16 / +10 5 ✓ Full exchange observed
09-16 21:42 40m -12 / - II7IAME - / +9 2 Partial capture
09-16 21:33 40m -14 / - VJ6X - / - 2 ✓ Closing fragment
09-16 21:32 40m -18 / - SM0IJS - / +6 2 ✓ Closing fragment
09-16 21:28 40m -11 / - G8KSH -9 / +7 3 ✓ Closing observed
09-11 21:38 40m -4 / - G6DDN - / -9 5 ✓ Closing fragment
09-11 21:35 40m +1 / - SP8MZB - / +10 3 ✓ Closing fragment
09-11 21:35 40m - / - DK5EO -5 / - 5 Partial capture
09-11 21:34 40m +1 / - SQ8NA - / -2 3 ✓ Closing fragment
09-11 21:32 40m 0 / - SV2RYU - / -8 3 ✓ Closing fragment
09-11 21:29 40m 0 / - M6DPS - / -2 3 ✓ Closing fragment
09-11 21:27 40m +12 / - YU4OCC - / - 2 Partial capture
09-11 21:23 40m +7 / -10 SM7TZK -8 / - 7 ✓ Closing observed
09-11 21:20 40m -2 / -8 II9IAGM -14 / -3 3 Partial capture
09-11 21:17 40m +10 / - II4IANT - / +7 2 Partial capture

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
222230  +2 1177  SQ6FHT HB9CNU R-03 (x2)
222600  +0 1392  N1IWP HB9CNU JN37
222700  +0 1392  CT2JAE HB9CNU JN37 (x4)
222915  -6  632  HB9CNU CT2JAE RR73
222930  +2 1366  CT2JAE HB9CNU R+05
222945  -5  632  HB9CNU CT2JAE RR73
223000  -1 1366  CT2JAE HB9CNU 73
223100  +3 1366  TA2EE HB9CNU RR73
223230  -7 1366  M9STN HB9CNU JN37 (x3)
20m 
UTC    dB Audio  Message
062100  -5  859  SP9FOW HB9CNU JN37 (x3)
062800 -13 2559  HB9CNU II7MGXX -08 (x2)
062845  -9 2560  II7MGXX HB9CNU R-05
064000  -8 2102  HB9CNU S54NA RR73
064215  +7 2383  KO3ZDE HB9CNU R-12 (x2)
065030  -8 1993  AO25FDM HB9CNU JN37 (x3)
065900 -24 1368  HB9CNU DB100FT +11
065915  -4 1993  AO25FDM HB9CNU R+03
070845  -7 1993  SP8S/P HB9CNU R+02
10m 
UTC    dB Audio  Message
102900  -4 1232  EA2AR HB9CNU 73
102930 -11 1232  9J2FI HB9CNU R-09 (x3)
103300  -1  867  EA7KUH HB9CNU JN37 (x3)
103430  -4  867  SP8BJU HB9CNU R+15
104930  -7 2596  PU7OHK HB9CNU JN37
105600 -13 1049  CT2KNA HB9CNU 73
105700 -14 1048  LZ4VR HB9CNU +18 (x2)
110330 -11 2595  PU7OHK HB9CNU JN37 (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.

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