HB9ZHK — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving HB9ZHK, decoded by SO8OO in southeastern Poland. 315 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 8 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-09-17.
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 315 FT8 messages attributed to HB9ZHK as the transmitting token by decoded message structure across 8 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (94%), followed by 20 m (6%). Most decodes (75%) fell within the six-hour window 18:00-00:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (67%); the estimated median was -17 dB.
Overview
Bands
Last attributed message: 2026-09-17 21:02 UTC
Observed FT8 message patterns
- Attributed sample
- 315 messages
- Active dates
- 8 UTC dates
- Estimated median S/N
- -17 dB
- Estimated 10th-90th percentile
- -23 to -13 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 211, moderate (-15 to -9 dB) 101, strong (≥ -8 dB) 3.
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 HB9ZHK 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 HB9ZHK
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 · 258 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 975 km (approx.)
- Last such locator decoded
- 2026-09-17 20:55 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 | HB9ZHK S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-17 21:43 | 40m | - / -24 | SV1PLR | -18 / - | 3 | Partial capture |
| 09-17 21:02 | 40m | -10 / -15 | F8ADF | -14 / -2 | 3 | Partial capture |
| 09-17 21:00 | 40m | -14 / - | SP100PKP | - / -18 | 4 | ✓ Closing fragment |
| 09-17 20:54 | 40m | -15 / - | R5QO/QRP | - / -18 | 4 | Partial capture |
| 09-17 20:30 | 40m | -12 / - | UA2FFD | - / - | 2 | Partial capture |
| 09-17 20:25 | 40m | -14 / -12 | G1MPC | -5 / - | 2 | Partial capture |
| 09-17 20:22 | 40m | - / -4 | DG2BWG | -3 / - | 2 | ✓ Closing fragment |
| 09-17 19:24 | 40m | -18 / -18 | M0SSV | -1 / -14 | 3 | Partial capture |
| 09-17 19:14 | 40m | -14 / - | R3YH | - / - | 3 | Partial capture |
| 09-17 18:58 | 40m | -12 / -20 | R3YH | +1 / - | 5 | Partial capture |
| 09-17 18:54 | 40m | -20 / - | PD1HK | - / - | 2 | Partial capture |
| 09-17 18:42 | 40m | -17 / -10 | PD1HK | -3 / - | 4 | Partial capture |
| 09-17 18:41 | 40m | - / -15 | UA7XA | -4 / - | 3 | ✓ Closing fragment |
| 09-17 18:25 | 40m | -14 / - | F4NJZ | - / - | 3 | Partial capture |
| 09-17 18:10 | 40m | -13 / +4 | OI5AY | -1 / - | 3 | Partial capture |
| 09-17 17:54 | 40m | -20 / - | II6IALU | - / - | 2 | Partial capture |
| 09-17 16:14 | 40m | -21 / -18 | S58Z | +2 / - | 2 | Partial capture |
| 09-17 15:10 | 40m | - / -11 | DL5WP | -4 / - | 2 | ✓ Closing fragment |
| 09-17 13:42 | 40m | - / -16 | I4HRH | -16 / - | 2 | ✓ Closing fragment |
| 09-17 12:10 | 40m | - / -12 | S58BJ | -15 / - | 2 | ✓ Closing fragment |
| 09-17 12:05 | 40m | - / -5 | E77WM | -10 / - | 2 | ✓ Closing fragment |
| 09-17 11:42 | 40m | - / -9 | E77WM | -10 / - | 3 | Partial capture |
| 09-17 10:45 | 40m | - / +1 | OE3FFC | -9 / - | 2 | ✓ Closing fragment |
| 09-17 10:37 | 40m | - / 0 | IN3JRZ | -16 / - | 2 | Partial capture |
| 09-17 08:55 | 40m | - / -7 | OE9NET | -14 / - | 2 | ✓ Closing fragment |
| 09-17 05:37 | 40m | - / -9 | F4FQY | +2 / - | 2 | ✓ Closing fragment |
| 09-17 05:01 | 40m | -14 / - | HA5LB | - / - | 2 | Partial capture |
| 09-17 03:03 | 40m | - / -19 | JY5IB | -21 / - | 2 | Partial capture |
| 09-17 03:03 | 40m | - / -20 | RA6FRI | -10 / - | 2 | ✓ Closing fragment |
| 09-17 02:59 | 40m | - / -15 | RA6FRI | -16 / - | 2 | Partial capture |
| 09-16 23:18 | 40m | - / -14 | 2E0TZW | -13 / - | 4 | ✓ Closing fragment |
| 09-16 22:29 | 40m | - / -10 | M0XUE | 0 / - | 2 | ✓ Closing fragment |
| 09-16 20:57 | 40m | -13 / - | II6IGTO | - / - | 2 | ✓ Closing fragment |
| 09-16 20:53 | 40m | -15 / - | SP9HPI | - / -16 | 6 | ✓ Closing fragment |
| 09-16 20:51 | 40m | -16 / - | M8JYD | - / - | 2 | Partial capture |
| 09-16 20:48 | 40m | -16 / - | EA1SS | - / - | 3 | Partial capture |
| 09-16 20:45 | 40m | -17 / -11 | IK8TWV | -24 / -23 | 2 | Partial capture |
| 09-16 20:32 | 40m | -13 / - | G3YPP/P | - / -21 | 3 | ✓ Closing fragment |
| 09-16 20:31 | 40m | -16 / - | OZ1KZX | - / - | 2 | Partial capture |
| 09-16 20:17 | 40m | -16 / - | YO6BGT | - / - | 3 | Partial capture |
| 09-16 20:07 | 40m | -20 / - | SQ8AA | - / - | 2 | Partial capture |
| 09-16 20:01 | 40m | -19 / -3 | G4DXG | +2 / - | 3 | ✓ Closing observed |
| 09-16 19:59 | 40m | - / - | PD2V | -12 / - | 3 | Partial capture |
| 09-16 19:56 | 40m | - / - | PD2V | -3 / - | 2 | Partial capture |
| 09-16 15:59 | 40m | - / -14 | HB9GXI | -12 / - | 3 | ✓ Closing fragment |
| 09-16 15:48 | 40m | - / -13 | SP2PAQ | 0 / - | 4 | ✓ Closing fragment |
| 09-16 15:13 | 40m | - / -13 | DL4KSD | -5 / - | 3 | ✓ Closing fragment |
| 09-16 14:50 | 40m | - / -20 | OE5AMR | -2 / - | 4 | ✓ Closing fragment |
| 09-16 13:50 | 40m | - / -13 | DL4BBY | -10 / - | 2 | ✓ Closing fragment |
| 09-16 10:20 | 40m | - / -6 | DL1MBG | -10 / - | 2 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 205400 -19 1899 UA2FFD HB9ZHK JN47 205430 -13 2249 R5QO/QRP HB9ZHK JN47 (x4) 210000 -11 1891 SP100PKP HB9ZHK R-18 (x4) 210215 -16 1987 HB9ZHK F8ADF -15 210230 -10 2201 F8ADF HB9ZHK R-02 210245 -12 1987 HB9ZHK F8ADF RRR 214315 -24 1440 HB9ZHK SV1PLR -24 (x3)
UTC dB Audio Message 172645 -7 2764 HB9ZHK ON4WV JO21 (x2) 173330 -5 2250 HB9ZHK M8BJL -15 173915 -14 2488 HB9ZHK GM3CQD -20 (x4)
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