YO9HB — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving YO9HB, decoded by SO8OO in southeastern Poland. 434 FT8 messages attributed to this token as transmitter, on 20m, 10m, across 39 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-08-28.
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 434 FT8 messages attributed to YO9HB as the transmitting token by decoded message structure across 39 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (84%), followed by 10 m (16%). Several six-hour UTC windows tied for the largest share (52%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (66%); the estimated median was -4.2 dB.
Overview
Bands
Last attributed message: 2026-08-28 06:47 UTC
Observed FT8 message patterns
- Attributed sample
- 434 messages
- Active dates
- 39 UTC dates
- Estimated median S/N
- -4.2 dB
- Estimated 10th-90th percentile
- -15 to +8 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 43, moderate (-15 to -9 dB) 106, strong (≥ -8 dB) 285.
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 YO9HB 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 YO9HB
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
- KN34 · 224 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 721 km (approx.)
- Last such locator decoded
- 2026-08-28 06:47 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 | YO9HB S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 08-30 16:50 | 20m | - / +5 | M7TPT | 0 / - | 2 | ✓ Closing fragment |
| 08-30 16:08 | 20m | - / -16 | UN9PQ | -16 / - | 2 | Partial capture |
| 08-29 17:11 | 20m | - / +4 | M7OKF | -12 / - | 2 | ✓ Closing fragment |
| 08-29 16:47 | 20m | - / - | EA5HM | +2 / - | 5 | Partial capture |
| 08-25 16:59 | 20m | -20 / - | BD4XGP | - / - | 3 | Partial capture |
| 08-25 06:58 | 20m | - / -5 | G0ORX | +9 / - | 4 | ✓ Closing fragment |
| 08-24 17:30 | 20m | -12 / - | EA2DR | -2 / -9 | 3 | ✓ Closing observed |
| 08-24 17:09 | 20m | -17 / - | JH5AVM | -15 / -10 | 3 | Partial capture |
| 08-24 17:06 | 20m | -9 / - | JG1PFJ | - / -17 | 3 | ✓ Closing fragment |
| 08-24 17:01 | 20m | -7 / -2 | JN1ILK | +11 / -16 | 4 | ✓ Full exchange observed |
| 08-23 08:30 | 20m | +5 / -6 | F1UNR | -3 / -19 | 7 | ✓ Full exchange observed |
| 08-23 06:04 | 20m | - / -10 | XQ1KK | -7 / - | 3 | Partial capture |
| 08-11 17:49 | 20m | +3 / - | SQ5PTZ | - / -15 | 3 | ✓ Closing fragment |
| 08-11 17:48 | 20m | +4 / - | EA1FMJ | - / - | 2 | Partial capture |
| 08-11 17:46 | 20m | 0 / - | PD9ML | - / -23 | 3 | ✓ Closing fragment |
| 08-11 17:43 | 20m | -16 / - | JH5AVM | - / -13 | 3 | ✓ Closing fragment |
| 08-11 17:39 | 20m | +8 / - | K2TQC | - / -14 | 2 | Partial capture |
| 08-11 17:37 | 20m | +2 / - | <...> | - / -12 | 2 | Partial capture |
| 08-08 16:06 | 10m | - / -23 | RL3K | -10 / - | 3 | ✓ Closing fragment |
| 08-02 06:16 | 20m | 0 / - | HK3W | - / - | 4 | Partial capture |
| 08-02 06:12 | 20m | -2 / - | OA4YX | - / - | 8 | Partial capture |
| 08-02 05:48 | 20m | +1 / - | HK3W | - / - | 4 | Partial capture |
| 08-01 08:36 | 20m | -20 / -18 | OE1TKS | -20 / -20 | 4 | ✓ Full exchange observed |
| 08-01 08:28 | 10m | - / -7 | DF7IW | +7 / - | 2 | ✓ Closing fragment |
| 07-30 16:38 | 20m | +8 / +6 | DF0KK | -1 / +5 | 6 | ✓ Full exchange observed |
| 07-30 16:35 | 20m | +4 / - | <...> | - / -13 | 2 | Partial capture |
| 07-29 16:47 | 10m | -10 / - | R2PJ | - / -7 | 2 | ✓ Closing fragment |
| 07-29 16:44 | 10m | -6 / - | ON4AHS | -13 / -10 | 3 | ✓ Closing observed |
| 07-29 16:43 | 10m | -6 / - | PD3PAM | - / -15 | 3 | ✓ Closing fragment |
| 07-29 16:42 | 10m | -10 / - | OK1HEH | - / -2 | 2 | ✓ Closing fragment |
| 07-29 16:39 | 10m | -4 / - | SQ8AA | - / -5 | 2 | Partial capture |
| 07-29 16:36 | 10m | -8 / - | <...> | - / -17 | 2 | Partial capture |
| 07-27 07:44 | 10m | - / - | DN9CHV | -20 / - | 3 | Partial capture |
| 07-26 16:23 | 20m | +4 / - | <...> | - / -13 | 4 | Partial capture |
| 07-26 16:21 | 20m | +10 / - | YO5LNX/P | - / -14 | 3 | ✓ Closing fragment |
| 07-26 16:19 | 20m | +6 / - | G8ZZL | - / -21 | 2 | Partial capture |
| 07-26 14:58 | 20m | - / +1 | PD1LVK | -18 / - | 2 | ✓ Closing fragment |
| 07-26 07:18 | 20m | - / - | OZ1SMB | -6 / - | 2 | Partial capture |
| 07-25 17:46 | 20m | -19 / - | BA6CC | - / -18 | 2 | Partial capture |
| 07-25 17:37 | 20m | -8 / - | EA4IDN | - / - | 2 | Partial capture |
| 07-24 09:18 | 20m | +10 / - | R6LKG | - / -8 | 2 | ✓ Closing fragment |
| 07-24 09:16 | 20m | 0 / - | UT2SQ | - / -14 | 2 | ✓ Closing fragment |
| 07-24 09:14 | 20m | 0 / - | LA6VQ | - / - | 2 | ✓ Closing fragment |
| 07-24 09:12 | 20m | +1 / - | SQ8M | - / -11 | 3 | ✓ Closing fragment |
| 07-24 09:09 | 20m | +4 / - | ON4AZR | -8 / -10 | 4 | Partial capture |
| 07-24 09:02 | 20m | -12 / - | UG0B/P | - / -17 | 2 | ✓ Closing fragment |
| 07-24 08:56 | 20m | -9 / - | A41ZZ | - / -14 | 3 | ✓ Closing fragment |
| 07-23 07:26 | 10m | -8 / - | SH0JPO | - / -14 | 4 | ✓ Closing fragment |
| 07-23 07:22 | 10m | +2 / - | EG5DX | -21 / -18 | 4 | ✓ Closing observed |
| 07-23 07:14 | 10m | +5 / - | F4HIK | - / -3 | 2 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 064715 +1 1746 W1AW/2 YO9HB KN34 164745 -1 1529 YO9HB EA5HM IM99 (x5) 171100 -8 1980 YO9HB M7OKF +04 (x2) 160845 -16 2042 YO9HB UN9PQ -16 (x2) 163700 -6 1218 YO9HB ON5VKE -04 164800 -9 1194 YO9HB M0XCZ RR73 165030 +2 2040 YO9HB M7TPT +05 (x2) 165530 -11 353 YO9HB RR73; IK4LZH <...> -06
UTC dB Audio Message 164245 -15 1713 OK1HEH YO9HB 73 164345 -3 1708 PD3PAM YO9HB -15 164415 -6 1389 ON4AHS YO9HB R-10 164430 -13 1388 YO9HB ON4AHS RR73 164445 -6 1388 ON4AHS YO9HB 73 164545 -6 1763 PD3PAM YO9HB RR73 (x2) 164715 -9 1637 R2PJ YO9HB R-07 (x2) 082845 +5 1385 YO9HB DF7IW -07 (x2) 081300 -23 1599 YO9HB R6DVV KN95 160600 -11 1320 YO9HB RL3K KO91 (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.
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