JK4JMO — reception at SO8OO
Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.
FT8 activity
Receiver-side FT8 activity involving JK4JMO, decoded by SO8OO in southeastern Poland. 11 FT8 messages attributed to this token as transmitter, on 20m, across 4 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-06-19.
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 11 FT8 messages attributed to JK4JMO as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). In this small sample, the estimated median decoder S/N was -12 dB; no usual signal pattern is inferred.
Overview
Observed FT8 message patterns
- Attributed sample
- 11 messages
- Active dates
- 4 UTC dates
- Estimated median S/N
- -12 dB
- S/N percentile sample
- Too small
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 1, moderate (-15 to -9 dB) 10, 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 JK4JMO in decoded directed-looking exchanges:
Most frequent locator attributed to JK4JMO
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
- PM64 · 9 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 8,453 km (approx.)
- Last such locator decoded
- 2026-06-19 21:29 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 | JK4JMO S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-27 08:42 | 10m | - / -18 | CN8NS | -15 / - | 2 | Partial capture |
| 10-23 20:40 | 80m | - / -24 | OM3TWM | -3 / - | 2 | Partial capture |
| 10-18 20:46 | 80m | - / -14 | OT7K | +14 / - | 5 | Partial capture |
| 10-16 22:17 | 40m | - / - | IT9IST | -14 / - | 2 | Partial capture |
| 10-02 20:18 | 40m | - / -14 | OT7K | +15 / - | 2 | ✓ Closing fragment |
| 09-01 17:22 | 80m | - / -10 | LY7M | +7 / - | 2 | Partial capture |
| 08-27 21:51 | 20m | - / -16 | EA5OM | +2 / - | 3 | ✓ Closing fragment |
| 08-21 20:45 | 40m | - / -25 | DF8AA | +4 / - | 4 | ✓ Closing fragment |
| 08-21 20:43 | 40m | - / -25 | GW8DX | +8 / - | 2 | ✓ Closing fragment |
| 08-21 20:41 | 40m | - / -14 | ON4IQ | +13 / - | 3 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 084230 -16 2221 JK4JMO CN8NS -18 (x2)
UTC dB Audio Message 172245 +7 2000 JK4JMO LY7M -10 (x3) 204630 +19 681 JK4JMO OT7K -14 (x5) 204015 -2 1969 JK4JMO OM3TWM -24 (x2)
UTC dB Audio Message 204130 +11 2106 JK4JMO ON4IQ JO20 (x3) 204300 +10 2875 JK4JMO GW8DX -25 (x2) 204530 +10 2667 JK4JMO DF8AA JO60 (x4) 201815 +13 1194 JK4JMO OT7K -14 (x2) 221745 -16 2275 JK4JMO IT9IST JM78 (x2)
UTC dB Audio Message 215130 +1 2417 JK4JMO EA5OM IM99 (x3)
CW
No CW receptions recorded for this callsign in the last 30 days.
Explore CW reception at SO8OOFT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee