F4MCB — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving F4MCB, decoded by SO8OO in southeastern Poland. 39 FT8 messages attributed to this token as transmitter, on 40m, across 1 UTC dates in the available aggregate history. Last observed 2026-09-11.
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 39 FT8 messages attributed to F4MCB as the transmitting token by decoded message structure across 1 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (100%). In this small sample, the estimated median decoder S/N was -10 dB; no usual signal pattern is inferred.
Overview
Observed FT8 message patterns
- Attributed sample
- 39 messages
- Active dates
- 1 UTC dates
- Estimated median S/N
- -10 dB
- Estimated 10th-90th percentile
- -22 to -4 dB
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 11, moderate (-15 to -9 dB) 13, strong (≥ -8 dB) 15.
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 F4MCB in decoded directed-looking exchanges:
Most frequent locator attributed to F4MCB
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
- IN88 · 27 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,799 km (approx.)
- Last such locator decoded
- 2026-09-11 03:31 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 | F4MCB S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-11 03:31 | 40m | -10 / -21 | RK4FF | -10 / +4 | 7 | Partial capture |
| 09-11 03:12 | 40m | -6 / - | HG8LXL | - / +1 | 2 | ✓ Closing fragment |
| 09-11 03:03 | 40m | -6 / - | UT2AU | - / +7 | 4 | ✓ Closing fragment |
| 09-10 18:45 | 40m | - / -10 | DK7ZT | +2 / - | 2 | Partial capture |
| 09-10 18:41 | 40m | - / -11 | F4LTP | -5 / - | 6 | ✓ Closing fragment |
| 09-07 10:09 | 40m | - / +2 | DK7ZT | -22 / - | 4 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 031215 -7 1421 F4MCB RK4FF -14 031230 -2 1420 HG8LXL F4MCB +01 (x2) 032900 -24 1390 CQ F4MCB IN88 (x5) 033145 -11 1391 F4MCB RK4FF -21 (x3) 033300 -12 1390 RK4FF F4MCB R+04 (x4)
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