Z33C — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving Z33C, decoded by SO8OO in southeastern Poland. 45 FT8 messages attributed to this token as transmitter, on 10m, across 1 UTC dates in the available aggregate history. Last observed 2026-07-18.
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 45 FT8 messages attributed to Z33C as the transmitting token by decoded message structure across 1 UTC dates in the available aggregate history. The largest monitored-band total was 10 m (100%). In this small sample, the estimated median decoder S/N was -17 dB; no usual signal pattern is inferred.
Overview
Observed FT8 message patterns
- Attributed sample
- 45 messages
- Active dates
- 1 UTC dates
- Estimated median S/N
- -17 dB
- Estimated 10th-90th percentile
- -22 to -13 dB
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 26, moderate (-15 to -9 dB) 19, strong (≥ -8 dB) 0.
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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).
Frequent counterpart tokens observed at SO8OO
Tokens most often paired with Z33C in decoded directed-looking exchanges:
Most frequent locator attributed to Z33C
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
- KN11 · 8 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 943 km (approx.)
- Last such locator decoded
- 2026-07-18 18:51 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 | Z33C S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 08-09 13:36 | 10m | - / -21 | IK4UPG | -15 / - | 7 | Partial capture |
| 07-19 20:24 | 10m | - / -4 | RK3ZB | +6 / - | 2 | Partial capture |
| 07-19 20:17 | 10m | - / -15 | IK1EZX | -19 / - | 3 | Partial capture |
| 07-19 20:14 | 10m | - / - | S55A | -14 / - | 2 | Partial capture |
| 07-18 18:52 | 10m | -14 / -7 | G1OZO | -12 / -5 | 8 | ✓ Full exchange observed |
| 07-18 18:52 | 10m | -13 / - | F1TRF | - / -7 | 2 | ✓ Closing fragment |
| 07-18 18:49 | 10m | - / - | DN9AVK | -7 / - | 2 | Partial capture |
| 07-18 18:48 | 10m | -14 / - | DN9TB | - / -6 | 2 | ✓ Closing fragment |
| 07-18 18:46 | 10m | -17 / - | RA4P | - / -18 | 2 | ✓ Closing fragment |
| 07-18 18:44 | 10m | -20 / - | DJ7JB | - / -2 | 2 | Partial capture |
| 07-18 18:43 | 10m | -16 / - | DN9MRB | - / +2 | 2 | ✓ Closing fragment |
| 07-18 18:39 | 10m | -14 / - | SM6KKX | - / 0 | 2 | ✓ Closing fragment |
| 07-18 18:37 | 10m | -17 / - | GI5CEO | - / -3 | 3 | Partial capture |
| 07-18 18:36 | 10m | -16 / - | DO7BW | - / -5 | 2 | ✓ Closing fragment |
| 07-18 18:32 | 10m | - / - | DN9BT | -12 / - | 3 | Partial capture |
| 07-18 18:29 | 10m | -18 / -5 | IV3DXW | -1 / - | 3 | Partial capture |
| 07-18 18:29 | 10m | -18 / - | RC5F | -11 / - | 6 | ✓ Closing observed |
| 07-18 18:28 | 10m | -20 / - | DO5WG | - / +10 | 2 | ✓ Closing fragment |
| 07-18 18:28 | 10m | - / - | G1OZO | -8 / - | 5 | Partial capture |
| 07-18 18:27 | 10m | -22 / - | DM5ME | - / +8 | 2 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 201730 -19 1842 Z33C IK1EZX R-15 (x3) 202200 -23 1839 Z33C S59MA R-02 202400 +4 2785 Z33C RK3ZB -04 202400 -7 1317 Z33C IK0SRL -02 202430 +8 2785 Z33C RK3ZB -04 133600 -21 1721 Z33C IK4UPG -21 (x7) 134100 -15 1722 Z33C F5THL 73
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