JH4MGU — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving JH4MGU, decoded by SO8OO in southeastern Poland. 175 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 1 UTC dates in the available aggregate history. Last observed 2026-08-23.
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 175 FT8 messages attributed to JH4MGU as the transmitting token by decoded message structure across 1 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (94%), followed by 40 m (6%). In this small sample, the estimated median decoder S/N was -5 dB; no usual signal pattern is inferred.
Overview
Bands
Last attributed message: 2026-08-23 23:02 UTC
Observed FT8 message patterns
- Attributed sample
- 175 messages
- Active dates
- 1 UTC dates
- Estimated median S/N
- -5 dB
- Estimated 10th-90th percentile
- -12 to -1 dB
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 8, moderate (-15 to -9 dB) 29, strong (≥ -8 dB) 138.
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 JH4MGU 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 JH4MGU
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
- PM75 · 76 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 8,477 km (approx.)
- Last such locator decoded
- 2026-08-23 23:02 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 | JH4MGU S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-02 22:00 | 40m | - / -15 | DL3MIB | +4 / - | 3 | ✓ Closing fragment |
| 09-02 21:58 | 40m | - / -17 | IZ8XME | 0 / - | 3 | ✓ Closing fragment |
| 09-02 08:02 | 10m | - / -2 | EA3AKY | -10 / - | 2 | ✓ Closing fragment |
| 09-02 07:55 | 10m | - / -21 | LZ2II | -9 / - | 5 | Partial capture |
| 08-27 05:53 | 20m | - / -18 | XQ1KK | -11 / - | 2 | ✓ Closing fragment |
| 08-24 11:18 | 10m | - / -6 | G4XEE | -18 / - | 3 | ✓ Closing fragment |
| 08-23 22:59 | 20m | -10 / - | BI3AAJ/P | - / - | 5 | Partial capture |
| 08-23 22:51 | 20m | -14 / -23 | R2DN | +3 / - | 7 | ✓ Closing observed |
| 08-23 22:47 | 20m | - / +1 | 4Z5AY | +6 / - | 2 | ✓ Closing fragment |
| 08-23 22:42 | 20m | -4 / - | LZ2EW | - / -19 | 2 | ✓ Closing fragment |
| 08-23 22:41 | 20m | -6 / - | DC9YH | - / -17 | 2 | ✓ Closing fragment |
| 08-23 22:38 | 20m | -2 / - | DC3LD | - / -16 | 2 | ✓ Closing fragment |
| 08-23 22:35 | 20m | -4 / - | M9TAM | - / -16 | 3 | ✓ Closing fragment |
| 08-23 22:33 | 20m | -3 / - | CT1BFP | - / - | 5 | Partial capture |
| 08-23 22:31 | 20m | -5 / - | PF26GP | - / - | 3 | Partial capture |
| 08-23 22:29 | 20m | -6 / - | BD7PWV | - / -16 | 2 | ✓ Closing fragment |
| 08-23 22:27 | 20m | -5 / - | HG0NPJ | - / -13 | 3 | ✓ Closing fragment |
| 08-23 22:26 | 20m | -4 / +2 | OD5ZZ | -9 / -9 | 4 | ✓ Full exchange observed |
| 08-23 22:23 | 20m | -7 / - | G0ORC | - / -19 | 3 | ✓ Closing fragment |
| 08-23 22:19 | 20m | -5 / - | YT1DDL | - / -22 | 2 | ✓ Closing fragment |
| 08-23 22:17 | 20m | -6 / - | DL2AX | - / -11 | 2 | ✓ Closing fragment |
| 08-23 22:14 | 20m | -4 / - | DG6VC | - / -18 | 2 | ✓ Closing fragment |
| 08-23 22:13 | 20m | -10 / - | RL6MT | -2 / -23 | 7 | Partial capture |
| 08-23 22:07 | 20m | -8 / - | SP7NC | - / -16 | 2 | ✓ Closing fragment |
| 08-23 22:06 | 20m | -6 / - | BD8ENX | -18 / -13 | 4 | ✓ Closing observed |
| 08-23 22:04 | 20m | -3 / - | SP7AAO | - / -16 | 2 | ✓ Closing fragment |
| 08-23 22:02 | 20m | -7 / - | TA3ZZ | -14 / -22 | 5 | ✓ Closing observed |
| 08-23 21:59 | 20m | -8 / - | DL8HXP | - / -7 | 2 | ✓ Closing fragment |
| 08-23 21:58 | 20m | -2 / - | BH8NNU | - / -20 | 2 | ✓ Closing fragment |
| 08-23 21:56 | 20m | -5 / - | SQ5EXI | - / -9 | 3 | ✓ Closing fragment |
| 08-23 21:54 | 20m | -2 / -15 | IU5HIU | +4 / -13 | 5 | ✓ Full exchange observed |
| 08-23 21:53 | 20m | -2 / - | EA3AAY | - / -14 | 2 | ✓ Closing fragment |
| 08-23 21:52 | 20m | - / - | IU5HIU | -3 / - | 2 | Partial capture |
| 08-23 21:50 | 20m | 0 / - | 2E0BTX | - / -19 | 4 | ✓ Closing fragment |
| 08-23 21:50 | 20m | -2 / -12 | I6GFX | 0 / -16 | 10 | ✓ Full exchange observed |
| 08-23 21:49 | 20m | -1 / - | BH8NNU | - / -20 | 2 | Partial capture |
| 08-23 21:46 | 20m | -2 / - | SV1DZB | -14 / -7 | 3 | ✓ Closing observed |
| 08-23 21:45 | 20m | -2 / - | SP3SXU | - / -16 | 2 | ✓ Closing fragment |
| 08-23 21:44 | 20m | -2 / -17 | IW5ABF | -1 / -17 | 6 | ✓ Full exchange observed |
| 08-23 21:42 | 20m | -3 / - | BH4ECL | - / -9 | 2 | ✓ Closing fragment |
| 08-23 21:41 | 20m | -4 / - | RA6OF | - / -13 | 2 | ✓ Closing fragment |
| 08-23 21:39 | 20m | -5 / - | F5RAV | - / -13 | 4 | ✓ Closing fragment |
| 08-23 21:38 | 20m | -5 / - | OH4LRP | - / -16 | 2 | ✓ Closing fragment |
| 08-23 21:35 | 20m | -1 / - | JA9CYD | - / -16 | 2 | Partial capture |
| 08-23 21:34 | 20m | -2 / - | R7ZY | - / -16 | 2 | Partial capture |
| 08-23 21:33 | 20m | -2 / -9 | A92AE | -9 / -9 | 3 | ✓ Full exchange observed |
| 08-23 21:16 | 20m | - / - | DG6VC | -10 / - | 10 | Partial capture |
| 08-23 21:13 | 20m | -3 / - | DL1UDO | - / -15 | 6 | ✓ Closing fragment |
| 08-23 21:11 | 20m | -8 / -18 | EC5CFV | -13 / - | 2 | ✓ Closing observed |
| 08-23 20:21 | 40m | -10 / - | IU2OQT | -2 / -13 | 3 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 201930 -9 1688 JH4MGU SV1DKR R-08 201945 -11 2820 SV1DKR JH4MGU -17 (x2) 202045 -10 2820 CQ JH4MGU PM75 202100 +12 2820 JH4MGU RY3F -11 (x2) 202130 +1 797 JH4MGU IU2OQT JN45 (x2) 202215 -10 2820 IU2OQT JH4MGU -13 215845 -2 1616 JH4MGU IZ8XME -17 (x3) 220015 +3 1069 JH4MGU DL3MIB JN57 (x3)
UTC dB Audio Message 111000 -21 1370 JH4MGU G4PMZ -14 111800 -18 1531 JH4MGU G4XEE -06 (x3) 075545 -8 1690 JH4MGU LZ2II -21 (x5) 080245 -10 719 JH4MGU EA3AKY -02 (x2)
UTC dB Audio Message 225300 +5 2424 JH4MGU R2DN KO95 225315 -15 2424 BI3AAJ/P JH4MGU 73 225330 +1 2424 JH4MGU R2DN KO95 (x2) 225415 -14 2424 R2DN JH4MGU RR73 225430 +1 2425 JH4MGU R2DN 73 225500 -19 1782 JH4MGU SV2TCC R-15 225845 -11 2424 R0SBH JH4MGU -19 225945 -13 2424 BI3AAJ/P JH4MGU PM75 (x5) 055330 -13 1043 JH4MGU XQ1KK -18 (x2)
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