W4JHV — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving W4JHV, decoded by SO8OO in southeastern Poland. 177 FT8 messages attributed to this token as transmitter, on 20m, across 12 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-08-28.
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 177 FT8 messages attributed to W4JHV as the transmitting token by decoded message structure across 12 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -13 dB.
Overview
Observed FT8 message patterns
- Attributed sample
- 177 messages
- Active dates
- 12 UTC dates
- Estimated median S/N
- -13 dB
- Estimated 10th-90th percentile
- -19 to -8 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 49, moderate (-15 to -9 dB) 105, strong (≥ -8 dB) 23.
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 W4JHV 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 W4JHV
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
- EM74 · 96 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 8,198 km (approx.)
- Last such locator decoded
- 2026-08-28 02:10 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 | W4JHV S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-20 18:47 | 10m | - / -5 | CE2SV | -10 / - | 4 | ✓ Closing fragment |
| 09-15 01:54 | 40m | - / -15 | F4CQS | -10 / - | 3 | Partial capture |
| 09-15 01:37 | 40m | - / -18 | F4CQS | -7 / - | 3 | Partial capture |
| 09-15 00:57 | 40m | - / -2 | F4CQS | -6 / - | 3 | Partial capture |
| 09-12 01:09 | 40m | - / -7 | K1DG | -7 / - | 2 | ✓ Closing fragment |
| 09-08 02:27 | 40m | - / -11 | YO9HP | +8 / - | 2 | ✓ Closing fragment |
| 08-28 19:09 | 20m | - / -5 | DA1EA | -16 / - | 2 | ✓ Closing fragment |
| 08-28 02:44 | 20m | - / - | WV2B | -6 / - | 4 | Partial capture |
| 08-28 02:29 | 20m | - / -7 | 9K2MP | -10 / - | 3 | ✓ Closing fragment |
| 08-28 01:19 | 20m | - / -7 | WP4JKT | -8 / - | 2 | Partial capture |
| 08-25 03:37 | 40m | - / -11 | UW5ZM | +12 / - | 2 | Partial capture |
| 08-25 03:31 | 40m | - / -18 | PC2J | +2 / - | 11 | ✓ Closing fragment |
| 08-25 03:23 | 40m | - / -19 | UT5ECZ | +8 / - | 2 | Partial capture |
| 08-25 03:22 | 40m | - / - | UW5ZM | +12 / - | 2 | Partial capture |
| 08-25 03:10 | 40m | - / - | UW5ZM | +14 / - | 2 | Partial capture |
| 08-24 03:04 | 20m | - / -14 | F1PBZ | +2 / - | 2 | Partial capture |
| 08-23 03:21 | 40m | - / -17 | PA4PA | +2 / - | 2 | ✓ Closing fragment |
| 08-23 02:43 | 40m | - / -22 | N2SU | -8 / - | 3 | ✓ Closing fragment |
| 08-23 02:36 | 40m | - / -10 | DL3PWR | +5 / - | 3 | Partial capture |
| 08-21 03:43 | 40m | - / -18 | CT2GQA | -8 / - | 4 | ✓ Closing fragment |
| 08-21 03:40 | 40m | - / -23 | UT7UJ | -13 / - | 3 | ✓ Closing fragment |
| 08-21 02:58 | 40m | - / -20 | MM0KQC | -18 / - | 2 | Partial capture |
| 08-21 02:58 | 40m | - / -12 | YO6LM | +6 / - | 2 | Partial capture |
| 08-20 22:34 | 20m | - / - | 4L7T | -3 / - | 3 | ✓ Closing fragment |
| 08-20 22:20 | 20m | - / -12 | 9A2M | -4 / - | 2 | ✓ Closing fragment |
| 08-20 22:13 | 20m | -17 / -12 | EA8DNB | -20 / -7 | 4 | ✓ Full exchange observed |
| 08-20 04:09 | 40m | - / -24 | PC2J | -4 / - | 7 | Partial capture |
| 08-20 04:03 | 40m | - / - | DH5BM | -12 / - | 3 | Partial capture |
| 08-20 03:51 | 40m | - / - | IZ8NON | -8 / - | 2 | Partial capture |
| 08-20 03:51 | 40m | - / - | DK3TA | -10 / - | 2 | Partial capture |
| 08-20 03:38 | 40m | - / - | IK4LZH | -2 / - | 2 | Partial capture |
| 08-20 03:37 | 40m | - / -18 | G1CEC | -9 / - | 5 | Partial capture |
| 08-20 03:35 | 40m | - / - | F5NBU | +4 / - | 3 | Partial capture |
| 08-20 03:34 | 40m | - / - | IK4LZH | -6 / - | 3 | Partial capture |
| 08-20 03:32 | 40m | - / - | F1IQH | -9 / - | 4 | Partial capture |
| 08-20 02:54 | 20m | - / - | F1IQH | -19 / - | 3 | Partial capture |
| 08-20 02:40 | 20m | - / -12 | F1PBZ | +14 / - | 3 | Partial capture |
| 08-20 00:03 | 20m | - / -16 | 7Z1BQ | -8 / - | 2 | ✓ Closing fragment |
| 08-15 00:47 | 20m | - / -17 | IU7WET | -2 / - | 5 | Partial capture |
| 08-14 23:58 | 20m | - / -18 | CE2SV | -10 / - | 3 | ✓ Closing fragment |
| 08-14 22:59 | 20m | - / -8 | DC7LR | -4 / - | 3 | ✓ Closing fragment |
| 08-14 22:48 | 20m | - / -17 | DC7LR | -6 / - | 3 | ✓ Closing fragment |
| 08-12 18:02 | 20m | - / -15 | DK7MT | -8 / - | 2 | ✓ Closing fragment |
| 08-12 03:22 | 40m | - / -12 | YO9IAB | -6 / - | 3 | ✓ Closing fragment |
| 08-10 01:42 | 20m | - / +3 | IW4AOT | -3 / - | 5 | Partial capture |
| 08-08 03:24 | 20m | - / -17 | RK9S | -14 / - | 2 | ✓ Closing fragment |
| 08-07 03:45 | 40m | - / - | PD1B | -6 / - | 6 | Partial capture |
| 08-07 03:25 | 40m | - / -22 | YO4NF | -14 / - | 2 | ✓ Closing fragment |
| 08-07 03:20 | 40m | - / - | F4DIA | -12 / - | 3 | Partial capture |
| 08-06 01:39 | 20m | - / -10 | F1ODM | -16 / - | 2 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 225115 -13 830 W4JHV EA8BYO IL27 (x8) 211615 -12 1882 W4JHV CT7AIU -03 (x3) 184700 -5 2452 W4JHV CE2SV -05 (x4)
UTC dB Audio Message 020145 -9 398 W4JHV HI3A RR73 010915 -7 2143 W4JHV K1DG -07 (x2) 012245 -18 1462 W4JHV HC1BG FI09 023345 -5 2326 W4JHV EA3IAZ JN11 005715 -9 1813 W4JHV F4CQS -02 (x3) 011115 -14 839 W4JHV KD2DO FN13 013745 -6 1813 W4JHV F4CQS -18 (x6)
UTC dB Audio Message 020645 -10 2668 CQ W4JHV EM74 (x5) 021245 -11 669 SP7NC W4JHV RRR 022900 -12 1080 W4JHV 9K2MP -07 (x3) 024430 -7 729 W4JHV WV2B FM05 (x4) 190915 -14 2110 W4JHV DA1EA -05 (x2)
UTC dB Audio Message 032715 +16 2135 W4JHV 9A5E JN75
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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