HB9NBN — reception at SO8OO

Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.

FT8 activity

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

Receiver-side FT8 activity involving HB9NBN, decoded by SO8OO in southeastern Poland. 342 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 26 UTC dates in the available aggregate history. Observed between 2026-08-16 and 2026-10-17.

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 342 FT8 messages attributed to HB9NBN as the transmitting token by decoded message structure across 26 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (48%), followed by 80 m (42%) and 20 m (9%). Most decodes (76%) fell within the six-hour window 03:00-09:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -13 dB.

Overview

342
Messages attributed
26
UTC dates decoded
83
Active 15-min windows
-13 dB
Estimated median S/N

Bands

80m · 145 40m · 165 20m · 32
First attributed message: 2026-08-16
Last attributed message: 2026-10-17 18:49 UTC

Observed FT8 message patterns

Attributed sample
342 messages
Active dates
26 UTC dates
Estimated median S/N
-13 dB
Estimated 10th-90th percentile
-21 to -7 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 110, moderate (-15 to -9 dB) 165, strong (≥ -8 dB) 67.

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 HB9NBN 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 HB9NBN

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 · 196 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,116 km (approx.)
Last such locator decoded
2026-10-17 18:46 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 UTCBandHB9NBN S/NCounterpartCounterpart S/NMsgsCapture
10-17 19:05 80m - / -14 DO2HC -3 / - 3 ✓ Closing fragment
10-17 18:56 40m - / -3 DH0GBC +6 / - 11 Partial capture
10-17 18:52 40m - / -8 F6BHK -10 / - 2 ✓ Closing fragment
10-17 18:47 40m -12 / - SQ9PBV - / -1 2 ✓ Closing fragment
10-17 18:33 40m - / -14 LX1RFJ -14 / - 2 ✓ Closing fragment
10-17 05:49 80m - / -7 F4FSY -9 / - 2 Partial capture
10-17 05:48 80m - / -17 GM6URC -11 / - 3 ✓ Closing fragment
10-17 05:41 80m - / - OE7RFJ -20 / - 2 Partial capture
10-17 05:40 80m - / -8 OK1AY +4 / - 3 ✓ Closing fragment
10-17 05:35 80m - / -15 OM3ZAS 0 / - 3 ✓ Closing fragment
10-17 05:33 80m -18 / - RN2F - / - 2 Partial capture
10-17 05:27 80m -4 / - EC5M -13 / - 2 ✓ Closing observed
10-17 05:26 80m -8 / - RN2F - / - 2 Partial capture
10-17 05:24 80m - / -1 F5HNQ +10 / - 4 ✓ Closing fragment
10-13 16:57 40m - / -22 RM1B -2 / - 4 Partial capture
10-13 16:56 40m - / -10 YT2ZE -6 / - 2 Partial capture
10-13 16:53 40m - / -5 ON7AN 0 / - 2 ✓ Closing fragment
10-13 16:50 40m -8 / - RL2F - / - 5 Partial capture
10-10 07:15 40m - / -15 IZ4JMA -7 / - 2 ✓ Closing fragment
10-10 07:09 40m -5 / +9 PA3CPS +9 / -14 4 ✓ Full exchange observed
10-10 06:58 80m - / -12 ON4ASV -10 / - 3 ✓ Closing fragment
10-10 06:54 80m - / +1 F4FLF -18 / - 5 Partial capture
10-04 05:34 40m -12 / -8 SX2LGT -3 / -1 5 ✓ Full exchange observed
10-04 05:30 40m -9 / - OA4ENG - / - 2 Partial capture
10-04 05:23 40m -14 / - HK3YL - / - 2 Partial capture
10-04 05:21 40m -13 / - OA4ENG - / - 2 Partial capture
10-04 05:14 40m -14 / - CM7DJG - / - 2 Partial capture
10-04 05:08 80m - / -4 F6FTB +4 / - 4 ✓ Closing fragment
10-02 06:07 40m - / -11 IK4TVP 0 / - 3 ✓ Closing fragment
10-02 06:05 40m - / +2 G3TKT -10 / - 2 ✓ Closing fragment
10-02 06:04 40m - / -18 IU8RFW -2 / - 6 Partial capture
10-02 06:02 40m - / - PD1HBL -16 / - 2 Partial capture
10-02 05:56 80m - / -9 DL9KM -11 / - 4 ✓ Closing fragment
10-02 05:55 80m - / -19 DK8CX -4 / - 3 Partial capture
10-02 05:51 80m - / -21 HB3YOY -13 / - 3 ✓ Closing fragment
10-02 05:49 80m -20 / 0 HB9CEX -5 / +4 3 ✓ Full exchange observed
10-02 05:45 80m - / 0 HB9CEX -8 / - 4 Partial capture
10-02 05:44 80m -20 / - HB9XBY - / - 5 Partial capture
10-02 05:40 80m - / -1 DO7RMS -6 / - 3 ✓ Closing fragment
10-02 05:37 80m - / +2 HB9EFK +6 / - 2 ✓ Closing fragment
10-01 17:20 40m -15 / -18 OH5KNL +12 / -12 5 ✓ Full exchange observed
09-26 06:21 80m - / +10 DL8WEM -7 / - 3 ✓ Closing fragment
09-26 06:19 80m - / -14 DO2BBC -8 / - 4 ✓ Closing fragment
09-26 06:17 80m - / -16 PA3CPS -3 / - 3 Partial capture
09-25 05:22 40m -15 / - EA6AJW - / -4 2 Partial capture
09-25 05:21 40m -12 / - EA5PS - / -7 2 ✓ Closing fragment
09-25 05:13 40m -10 / - LZ1ZF - / - 2 Partial capture
09-25 05:08 80m - / -9 IN3OWY -8 / - 3 ✓ Closing fragment
09-25 05:07 80m - / -11 PE2JMR 0 / - 2 ✓ Closing fragment
09-25 05:00 80m - / -10 DO2XB +7 / - 3 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m 
UTC    dB Audio  Message
053645  +3 2345  HB9NBN OM3ZAS RR73
054045  +6 1750  HB9NBN OK1AY -08 (x2)
054115 -16  503  HB9NBN OE7RFJ JN67
054145  +1 1749  HB9NBN OK1AY RR73
054145 -24  503  HB9NBN OE7RFJ JN67
054445  -5 1815  HB9NBN F4FSY -11
054815 -12 1693  HB9NBN GM6URC -17 (x3)
054945 -12 1815  HB9NBN F4FSY JN25 (x2)
190500  -3 2487  HB9NBN DO2HC JO50 (x3)
40m 
UTC    dB Audio  Message
184745 -15 2390  SQ9PBV HB9NBN -01 (x2)
185200 -10 2042  HB9NBN F6BHK R-08 (x2)
185630  +7 2002  HB9NBN DH0GBC -03 (x11)
10m 
UTC    dB Audio  Message
060600  +0  780  HB9NBN DO5HCS R-05 (x2)
061230  -4 2954  HB9NBN DO1FDK JO41 (x5)
161345 -22 1882  HB9NBN F4HSB R-14 (x2)
131400 -11 2389  HB9NBN 5Z4VJ -01 (x2)
20m 
UTC    dB Audio  Message
070400 -12 1856  HB9NBN YO4GIY RR73
081200 -18 2464  E75W HB9NBN 73
155430  +0  633  HB9NBN A41KB -23 (x3)
155600  +2  633  HB9NBN RR73; RC9WC <...> -04
164215 -13 2105  CN8NS HB9NBN JN37
164615  +0  721  HB9NBN LB6BK +07 (x2)
164715 +18  721  HB9NBN UA4FEN -18 (x2)
164800 -13  721  UA4FEN HB9NBN R+09
164815  +7  721  HB9NBN UA4FEN -18 (x2)
165215  -6 2369  HB9NBN 5Z4VJ KI88

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.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

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