JF4VZT — 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 JF4VZT, decoded by SO8OO in southeastern Poland. 240 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, across 32 UTC dates in the available aggregate history. Observed between 2026-06-09 and 2026-10-21.
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 240 FT8 messages attributed to JF4VZT as the transmitting token by decoded message structure across 32 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (33%), followed by 20 m (31%) and 160 m (25%). Most decodes (100%) fell within the six-hour window 17:00-23:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -7.5 dB.
Overview
Bands
Last attributed message: 2026-10-21 21:41 UTC
Observed FT8 message patterns
- Attributed sample
- 240 messages
- Active dates
- 32 UTC dates
- Estimated median S/N
- -7.5 dB
- Estimated 10th-90th percentile
- -16 to +15 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 28, moderate (-15 to -9 dB) 76, strong (≥ -8 dB) 136.
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 JF4VZT 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 JF4VZT
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 · 73 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 8,453 km (approx.)
- Last such locator decoded
- 2026-10-21 21:41 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 | JF4VZT S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-20 21:13 | 40m | -4 / - | CT7AXN | - / - | 3 | Partial capture |
| 10-18 22:00 | 40m | -6 / - | MM0DXL | - / - | 3 | Partial capture |
| 10-18 21:58 | 40m | -8 / - | DK7QJ | -5 / -15 | 3 | ✓ Closing observed |
| 10-18 21:57 | 40m | -8 / -12 | G8KHF | 0 / -18 | 4 | ✓ Full exchange observed |
| 10-18 21:51 | 40m | - / - | G5LSI | +2 / - | 2 | Partial capture |
| 10-18 21:50 | 40m | -2 / -8 | G4IFX | +17 / -20 | 6 | ✓ Full exchange observed |
| 10-18 20:52 | 160m | - / -5 | YO3YV | -19 / - | 2 | ✓ Closing fragment |
| 10-18 20:52 | 160m | - / - | IK0PHY | -8 / - | 4 | Partial capture |
| 10-15 19:34 | 160m | -13 / -13 | E77EA | +8 / - | 3 | ✓ Closing observed |
| 10-15 19:08 | 160m | - / -18 | E77EA | +6 / - | 3 | Partial capture |
| 10-15 19:02 | 160m | - / - | RU3ACA | -12 / - | 4 | ✓ Closing fragment |
| 10-11 20:50 | 80m | - / - | SM3ULU | -12 / - | 2 | Partial capture |
| 10-11 20:45 | 80m | - / - | SM3ULU | -12 / - | 3 | Partial capture |
| 10-11 20:43 | 80m | - / -16 | DO2GGH | +5 / - | 4 | Partial capture |
| 10-11 20:42 | 80m | -5 / -16 | G0HVQ | -5 / -19 | 7 | ✓ Full exchange observed |
| 10-06 21:27 | 40m | - / - | DL9KM | -12 / - | 7 | Partial capture |
| 10-06 21:26 | 40m | -12 / - | LW5DD | - / -11 | 2 | ✓ Closing fragment |
| 10-06 21:25 | 40m | - / -12 | IU6PPX | -9 / - | 3 | Partial capture |
| 10-06 21:22 | 40m | -14 / - | BG2EFX | - / -4 | 2 | ✓ Closing fragment |
| 10-06 21:19 | 40m | - / -16 | CT3HU | -14 / - | 2 | Partial capture |
| 10-06 21:19 | 40m | -14 / -15 | IU3ACL | -10 / -17 | 7 | ✓ Full exchange observed |
| 10-06 21:14 | 40m | - / - | OK1SI | -8 / - | 7 | Partial capture |
| 10-06 21:12 | 40m | -13 / - | U1BD | -24 / -13 | 3 | ✓ Closing observed |
| 10-06 21:03 | 80m | - / -24 | IZ5NRF | +10 / - | 3 | Partial capture |
| 10-06 20:59 | 80m | - / -12 | OT7K | +14 / - | 2 | ✓ Closing fragment |
| 10-06 20:41 | 160m | - / -19 | R6KA | 0 / - | 2 | ✓ Closing fragment |
| 10-06 20:41 | 160m | - / - | IK0PHY | -6 / - | 5 | Partial capture |
| 10-06 20:25 | 160m | -19 / -21 | OM3TWM | +10 / - | 4 | Partial capture |
| 10-05 20:54 | 160m | - / - | LX1ER | -8 / - | 5 | Partial capture |
| 10-05 20:54 | 160m | - / -14 | SM0MPV | +5 / - | 4 | Partial capture |
| 10-05 18:30 | 160m | - / - | OH5LF | +17 / - | 3 | Partial capture |
| 10-05 18:16 | 160m | - / -22 | OM3SX | +10 / - | 4 | ✓ Closing fragment |
| 10-05 17:55 | 160m | - / - | OM3SX | +5 / - | 3 | Partial capture |
| 10-05 17:54 | 160m | - / - | IT9GUL | +4 / - | 4 | Partial capture |
| 10-05 17:53 | 160m | - / -5 | LZ2IP | +14 / - | 2 | ✓ Closing fragment |
| 10-04 20:52 | 160m | -11 / -18 | OM2WQ | +9 / -20 | 6 | ✓ Full exchange observed |
| 10-04 20:51 | 160m | - / - | EI6FR | -15 / - | 3 | Partial capture |
| 10-04 20:51 | 160m | - / - | YO2NAA | -8 / - | 7 | Partial capture |
| 10-04 20:50 | 160m | - / - | DM2SP | -16 / - | 5 | Partial capture |
| 10-04 20:49 | 160m | -14 / -24 | OK2BUZ | +16 / - | 10 | ✓ Closing observed |
| 10-04 20:47 | 160m | -13 / - | LZ2IP | - / - | 5 | Partial capture |
| 10-04 19:38 | 160m | - / - | RU3DK | -11 / - | 4 | Partial capture |
| 10-04 19:37 | 160m | - / - | R6ZBQ | -24 / - | 2 | Partial capture |
| 10-04 19:01 | 160m | - / - | UX0LL | +3 / - | 5 | Partial capture |
| 10-02 20:50 | 160m | - / -13 | PA0O | +3 / - | 5 | ✓ Closing fragment |
| 10-02 20:49 | 160m | - / -12 | LA6YEA | 0 / - | 4 | ✓ Closing fragment |
| 10-02 20:16 | 160m | - / - | 9A2RD | +1 / - | 4 | Partial capture |
| 10-02 20:13 | 160m | -16 / -22 | OK2BUZ | +16 / -16 | 7 | ✓ Full exchange observed |
| 10-02 20:09 | 160m | - / -17 | SP8VJV | 0 / - | 5 | ✓ Closing fragment |
| 10-02 20:08 | 160m | -12 / -15 | OM4AIM | +8 / - | 5 | ✓ Closing observed |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 215745 -7 280 G8KHF JF4VZT R-18 215800 -2 688 JF4VZT G8KHF RR73 215815 -9 281 G8KHF JF4VZT 73 215845 -6 280 DK7QJ JF4VZT -15 (x2) 215930 -5 280 JF4VZT DK7QJ 73 220015 -5 2620 MM0DXL JF4VZT PM64 (x3) 220145 -8 2620 HA9GKL JF4VZT -14 211330 -6 2571 CT7AXN JF4VZT PM64 (x3) 213745 -11 2737 EP2AES JF4VZT PM64 (x2)
UTC dB Audio Message 193545 +5 1702 JF4VZT E77EA RR73 193600 -13 2604 E77EA JF4VZT 73 205200 -15 2102 JF4VZT IK0PHY JN61 205230 -20 804 JF4VZT YO3YV -05 205230 -7 2102 JF4VZT IK0PHY JN61 205300 -18 804 JF4VZT YO3YV RR73 205300 -9 2102 JF4VZT IK0PHY JN61 (x2) 205600 -24 804 JF4VZT YO3YV -06 191945 -7 2456 JF4VZT ON7NQ -20 192815 -6 2173 JF4VZT IZ6TSA JN63 192815 +5 926 JF4VZT DL5OCE JO52 192815 +5 1090 JF4VZT 9A2NO JN85 200345 -2 1901 JF4VZT IK0PHY JN61 200615 +13 2447 JF4VZT DO9AO -13
UTC dB Audio Message 204315 -1 670 G0HVQ JF4VZT PM64 204330 +3 1036 JF4VZT DO2GGH -16 204345 -7 670 G0HVQ JF4VZT PM64 204400 -6 2442 JF4VZT G0HVQ -16 204415 -2 670 G0HVQ JF4VZT R-19 204430 -4 2443 JF4VZT G0HVQ RR73 204445 -5 670 G0HVQ JF4VZT 73 204500 -11 670 JF4VZT SM3ULU JP81 (x2) 204530 +9 1036 JF4VZT DO2GGH -14 204600 -14 669 JF4VZT SM3ULU JP81 204600 +1 1036 JF4VZT DO2GGH -14 205030 -2 670 JF4VZT YU1NTP KN04 205030 -15 1670 JF4VZT SM3ULU JP81 (x2)
UTC dB Audio Message 083615 -9 369 JF4VZT HC2GRC +07 (x2) 214115 -9 2780 M9TAM JF4VZT PM64 (x2)
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.
CW
No CW receptions recorded for this callsign in the last 30 days.
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