4X1VL — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving 4X1VL, decoded by SO8OO in southeastern Poland. 147 FT8 messages attributed to this token as transmitter, on 80m, 60m, across 21 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-09-21.
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 147 FT8 messages attributed to 4X1VL as the transmitting token by decoded message structure across 21 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (99%), followed by 60 m (1%). Most decodes (84%) fell within the six-hour window 19:00-01:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -13 dB.
Overview
Bands
Last attributed message: 2026-09-21 16:58 UTC
Observed FT8 message patterns
- Attributed sample
- 147 messages
- Active dates
- 21 UTC dates
- Estimated median S/N
- -13 dB
- Estimated 10th-90th percentile
- -24 to -4 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 59, moderate (-15 to -9 dB) 53, strong (≥ -8 dB) 35.
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 4X1VL 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 4X1VL
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
- KM72 · 22 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 2,224 km (approx.)
- Last such locator decoded
- 2026-08-14 23:46 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 | 4X1VL S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-21 16:58 | 80m | -24 / - | UR5SG | - / -12 | 2 | Partial capture |
| 09-21 02:25 | 80m | -9 / -15 | EU7A | +13 / -6 | 3 | ✓ Full exchange observed |
| 09-21 02:11 | 80m | -3 / -7 | I2KBD | +12 / -7 | 7 | Partial capture |
| 09-21 02:10 | 80m | - / -12 | EA7JIG | -19 / - | 2 | Partial capture |
| 09-21 02:10 | 80m | -9 / -8 | IS0AFM | -8 / - | 3 | ✓ Closing observed |
| 09-21 02:07 | 80m | -2 / - | EA7JIG | - / -19 | 3 | Partial capture |
| 09-21 02:05 | 80m | 0 / -12 | SQ6ELK | +10 / -19 | 4 | ✓ Full exchange observed |
| 09-21 02:03 | 80m | -2 / -11 | PA4PA | +20 / -14 | 6 | ✓ Full exchange observed |
| 09-21 01:59 | 80m | -2 / -7 | OE7UU | +10 / -5 | 6 | ✓ Full exchange observed |
| 09-19 22:30 | 80m | - / -11 | UF4S | 0 / - | 2 | ✓ Closing fragment |
| 09-19 22:26 | 80m | - / -7 | EA6Y | +4 / - | 2 | Partial capture |
| 09-19 22:24 | 80m | -19 / -6 | S52F | +18 / - | 3 | ✓ Closing observed |
| 08-30 00:07 | 80m | -15 / -11 | YL4U | 0 / -12 | 3 | ✓ Full exchange observed |
| 08-29 00:34 | 80m | -16 / -7 | IK7EES | +17 / -4 | 3 | Partial capture |
| 08-14 23:50 | 80m | -24 / - | IZ0COC | - / -8 | 2 | Partial capture |
| 08-14 23:48 | 80m | -24 / -20 | EA7LIC | -12 / -19 | 4 | ✓ Full exchange observed |
| 08-14 23:47 | 80m | -18 / - | RN3YN | - / -24 | 2 | Partial capture |
| 08-14 23:44 | 80m | -14 / -13 | R2UZ/P | -4 / -13 | 4 | ✓ Full exchange observed |
| 08-14 23:43 | 80m | -13 / -25 | SP6JIU | +24 / - | 3 | ✓ Closing observed |
| 08-14 01:04 | 80m | -10 / -15 | TN8GD | -23 / - | 3 | ✓ Closing observed |
| 08-13 22:18 | 80m | -14 / -10 | DF7EF | +17 / -8 | 8 | Partial capture |
| 08-12 23:51 | 80m | -8 / -13 | LY2HM | -4 / -20 | 4 | ✓ Full exchange observed |
| 08-08 21:26 | 80m | -8 / -17 | DL3TC | +5 / - | 4 | ✓ Closing observed |
| 08-08 21:25 | 80m | - / -5 | IK8INR | +2 / - | 3 | ✓ Closing fragment |
| 08-08 21:22 | 80m | -7 / -21 | LY1DY | +19 / - | 4 | ✓ Closing observed |
| 08-08 21:21 | 80m | - / - | IK8INR | -1 / - | 2 | Partial capture |
| 08-08 21:20 | 80m | -8 / -20 | HB3YBG | -4 / -14 | 4 | ✓ Full exchange observed |
| 08-05 21:36 | 80m | -12 / -14 | RC6OD | 0 / -12 | 4 | ✓ Full exchange observed |
| 08-05 21:20 | 80m | -12 / -17 | OZ1NIB | +1 / -19 | 4 | ✓ Full exchange observed |
| 07-29 22:33 | 80m | - / -25 | DL4RAQ | +11 / - | 3 | Partial capture |
| 07-29 22:28 | 80m | -11 / - | DL4RAQ | - / -15 | 3 | Partial capture |
| 07-29 22:08 | 80m | - / - | IU0VYT | +12 / - | 4 | Partial capture |
| 07-29 22:06 | 80m | - / -16 | SA3LEN | +20 / - | 2 | ✓ Closing fragment |
| 07-29 22:04 | 80m | - / - | EA8AR | -14 / - | 2 | Partial capture |
| 07-29 22:03 | 80m | - / -16 | R70OBN | +4 / - | 2 | ✓ Closing fragment |
| 07-25 23:14 | 80m | -5 / -16 | RC6OD | +15 / -9 | 12 | Partial capture |
| 07-25 22:34 | 80m | -1 / -14 | EA3NG | 0 / - | 3 | ✓ Closing observed |
| 07-24 22:00 | 80m | - / - | SP3VZT | +15 / - | 2 | Partial capture |
| 07-24 21:58 | 80m | -8 / -18 | YT1DDL | -3 / -15 | 3 | Partial capture |
| 07-24 21:56 | 80m | -12 / -17 | R3LA | -4 / -14 | 5 | ✓ Full exchange observed |
| 07-24 21:54 | 80m | -13 / - | SP6FME | - / -13 | 2 | Partial capture |
| 07-23 21:03 | 80m | - / -13 | EJ/G3PXT/P | -9 / - | 2 | Partial capture |
| 07-23 21:00 | 80m | - / -22 | DO9PV | -2 / - | 5 | Partial capture |
| 07-23 20:58 | 80m | -9 / -13 | DL5SD | +10 / -19 | 7 | ✓ Full exchange observed |
| 07-20 22:36 | 80m | -12 / -16 | SP9MQA | +20 / -12 | 4 | Partial capture |
| 07-13 19:59 | 80m | -11 / -17 | DF2RQ | +6 / -11 | 3 | Partial capture |
| 07-13 19:59 | 80m | -9 / -21 | G4ZFJ | -6 / -16 | 7 | ✓ Full exchange observed |
| 07-13 19:56 | 80m | -8 / -18 | JA5MHD | -24 / - | 3 | ✓ Closing observed |
| 07-13 19:55 | 80m | -10 / - | 9A60CBM | - / -5 | 4 | Partial capture |
| 07-13 19:53 | 80m | -21 / - | LB2YJ | - / -16 | 3 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 021030 -7 1860 4X1VL IS0AFM 73 021045 -16 1491 4X1VL EA7JIG R-12 021115 -3 545 I2KBD 4X1VL -07 (x2) 021300 +17 2343 4X1VL I2KBD R-07 (x5) 022545 -11 545 EU7A 4X1VL -06 022600 +13 2314 4X1VL EU7A R-15 022615 -7 545 EU7A 4X1VL RR73 165815 -24 545 UR5SG 4X1VL -12 (x2) 171515 -5 1903 4X1VL OZ1LXL JO55
UTC dB Audio Message 185815 -1 572 <...> 4X1VL -18 185830 +2 2413 4X1VL DR800WE R-06 191045 -5 573 EW8CW 4X1VL -19
UTC dB Audio Message 200500 -21 1619 4X1VL JI1CZK R-12
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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