JH4IFF — 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 JH4IFF, decoded by SO8OO in southeastern Poland. 557 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, across 57 UTC dates in the available aggregate history. Observed between 2026-06-12 and 2026-10-18.
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 557 FT8 messages attributed to JH4IFF as the transmitting token by decoded message structure across 57 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (43%), followed by 40 m (31%) and 80 m (24%). 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 -12 dB.
Overview
Bands
Last attributed message: 2026-10-18 20:47 UTC
Observed FT8 message patterns
- Attributed sample
- 557 messages
- Active dates
- 57 UTC dates
- Estimated median S/N
- -12 dB
- Estimated 10th-90th percentile
- -19 to -3 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 154, moderate (-15 to -9 dB) 233, strong (≥ -8 dB) 170.
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 JH4IFF 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 JH4IFF
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
- PM74 · 245 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 8,565 km (approx.)
- Last such locator decoded
- 2026-10-18 20:47 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 | JH4IFF S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-21 20:26 | 80m | - / -18 | OT7K | +20 / - | 4 | Partial capture |
| 10-20 08:51 | 10m | - / -13 | CN8WK | 0 / - | 2 | ✓ Closing fragment |
| 10-18 20:49 | 80m | - / -8 | S52D | -1 / - | 4 | ✓ Closing fragment |
| 10-18 20:47 | 80m | - / - | DO5RBB | -4 / - | 3 | Partial capture |
| 10-18 20:44 | 80m | -13 / -12 | DO2GGH | -6 / - | 4 | Partial capture |
| 10-18 20:42 | 80m | -14 / -21 | SQ9MSD | +4 / -24 | 5 | ✓ Full exchange observed |
| 10-18 20:38 | 80m | -11 / - | ES8TJM | - / - | 2 | Partial capture |
| 10-18 20:33 | 80m | - / -11 | YL3KZ | +2 / - | 4 | ✓ Closing fragment |
| 10-18 20:21 | 80m | - / - | DL1CC | -7 / - | 4 | ✓ Closing fragment |
| 10-18 20:18 | 80m | -11 / -19 | YU7BW | +16 / - | 5 | ✓ Closing observed |
| 10-17 21:03 | 40m | - / - | EA3ENB | -2 / - | 5 | Partial capture |
| 10-17 20:26 | 80m | - / -15 | RU3RA | -3 / - | 2 | ✓ Closing fragment |
| 10-17 20:23 | 80m | - / -19 | RV3V | -6 / - | 2 | ✓ Closing fragment |
| 10-17 20:21 | 80m | - / -14 | OH5YZ | -10 / - | 2 | Partial capture |
| 10-17 20:17 | 80m | - / -18 | DK2BJ | +6 / - | 6 | ✓ Closing fragment |
| 10-17 20:16 | 80m | - / - | SP4JSR | 0 / - | 4 | Partial capture |
| 10-17 20:14 | 80m | - / - | SP6TRK | -9 / - | 4 | Partial capture |
| 10-17 20:12 | 80m | - / -13 | YO9BPX | +8 / - | 2 | ✓ Closing fragment |
| 10-16 20:27 | 40m | -18 / -8 | IK5ZPU | +1 / -8 | 8 | ✓ Full exchange observed |
| 10-16 20:26 | 40m | -18 / -16 | F6CCS | +8 / - | 3 | ✓ Closing observed |
| 10-14 21:00 | 80m | - / -15 | IZ8FWN | -6 / - | 2 | ✓ Closing fragment |
| 10-14 20:57 | 80m | -8 / - | IZ8FWN | - / - | 2 | Partial capture |
| 10-14 20:53 | 80m | -5 / -3 | 9A2AJ | -2 / - | 3 | ✓ Closing observed |
| 10-14 20:53 | 80m | -12 / -13 | SP7IWA | -10 / -16 | 5 | ✓ Full exchange observed |
| 10-14 20:50 | 80m | -5 / - | S57UX | - / - | 2 | Partial capture |
| 10-14 20:45 | 160m | - / -19 | E73S | +15 / - | 4 | ✓ Closing fragment |
| 10-13 20:19 | 40m | -20 / - | R6DOB/M | - / - | 3 | Partial capture |
| 10-13 20:14 | 40m | - / -5 | IK4RVY | +2 / - | 5 | ✓ Closing fragment |
| 10-13 20:13 | 40m | - / -15 | IQ3TR | +16 / - | 2 | ✓ Closing fragment |
| 10-12 21:05 | 80m | -3 / -8 | SV2CWV | -8 / - | 4 | ✓ Closing observed |
| 10-12 21:01 | 80m | - / - | SP9FZH | -2 / - | 6 | Partial capture |
| 10-12 21:01 | 80m | -2 / - | OK1DX | - / - | 2 | Partial capture |
| 10-12 21:00 | 80m | -3 / -9 | YO2UKG | -10 / - | 4 | Partial capture |
| 10-12 20:59 | 80m | 0 / - | RC0CD | - / -4 | 2 | ✓ Closing fragment |
| 10-12 20:58 | 80m | -3 / -12 | SQ9BC | -3 / -14 | 4 | ✓ Full exchange observed |
| 10-12 20:20 | 40m | -18 / - | IT9GJK | - / -15 | 2 | Partial capture |
| 10-12 20:13 | 160m | -18 / -20 | EA6Y | +6 / - | 3 | ✓ Closing observed |
| 10-11 21:16 | 80m | - / - | G0IUS | +12 / - | 3 | Partial capture |
| 10-11 21:09 | 80m | - / - | SM3ULU | -12 / - | 2 | Partial capture |
| 10-11 21:07 | 80m | - / - | R6YY | -10 / - | 2 | ✓ Closing fragment |
| 10-11 21:06 | 80m | - / - | SQ9DDY | 0 / - | 6 | Partial capture |
| 10-11 21:05 | 80m | - / - | G0IUS | +6 / - | 2 | Partial capture |
| 10-11 21:05 | 80m | - / -18 | DO1ID | +7 / - | 5 | Partial capture |
| 10-11 21:04 | 80m | -12 / -14 | HB9BLQ | +8 / - | 4 | ✓ Closing observed |
| 10-11 21:00 | 80m | -8 / - | SP6BS | - / - | 2 | Partial capture |
| 10-11 20:59 | 80m | -18 / - | SP9TBT | -9 / -22 | 3 | ✓ Closing observed |
| 10-11 20:56 | 80m | - / -22 | DO1ID | +6 / - | 8 | Partial capture |
| 10-11 20:55 | 80m | -7 / -17 | IZ8XQC | +5 / -21 | 6 | ✓ Full exchange observed |
| 10-11 20:52 | 80m | -9 / -12 | HA1YN | +3 / - | 4 | ✓ Closing observed |
| 10-11 20:52 | 80m | - / - | SP6JIU | +22 / - | 3 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 204600 -5 2117 JH4IFF DO2GGH -12 (x2) 204700 -4 2887 JH4IFF DO5RBB JO40 204715 -16 1450 S52D JH4IFF PM74 204730 -6 2887 JH4IFF DO5RBB JO40 (x2) 204930 -6 1460 JH4IFF S52D -08 (x4) 205100 -11 2695 JH4IFF G0CUZ IO82 202600 +22 520 JH4IFF OT7K -18 (x4)
UTC dB Audio Message 081045 -19 1590 JH4IFF A71DA -13 (x2) 082200 -4 1252 JH4IFF II7MGXX -12 082230 +8 1252 JH4IFF RR73; F4LZZ <...> +00 082600 -7 1787 JH4IFF TA6B -15 085115 +0 1663 JH4IFF CN8WK -13 (x2)
UTC dB Audio Message 200700 +31 2597 JH4IFF OK2BUZ R-20 (x4) 195930 +13 1401 JH4IFF LZ2IP -13 (x3) 201300 +4 655 JH4IFF EA6Y -20 (x2) 201345 -18 656 EA6Y JH4IFF 73 204515 +12 2495 JH4IFF E73S JN92 (x4) 201845 -19 1621 JH4IFF LA9JKA JP32
UTC dB Audio Message 202815 -20 1345 IK5ZPU JH4IFF PM74 (x2) 202900 +1 790 JH4IFF IK5ZPU -08 202915 -18 1345 IK5ZPU JH4IFF R-08 202930 +1 790 JH4IFF IK5ZPU RR73 202945 -18 1345 IK5ZPU JH4IFF 73 205800 +4 548 JH4IFF PA1L RRR 205945 -17 1129 SO3F JH4IFF RR73 210115 -17 1128 SP3EK JH4IFF -08 210330 -7 1128 JH4IFF EA3ENB JN11 (x3) 210530 -11 1758 JH4IFF IT9ZGW JM76 210530 +0 1128 JH4IFF EA3ENB JN11 (x2)
UTC dB Audio Message 060500 -14 2072 JH4IFF DL9KM JN68 (x6)
UTC dB Audio Message 200430 -10 1030 SP5MXZ JH4IFF R-10 (x2) 200530 -10 1029 ON1JP JH4IFF R-14 (x4) 205200 -15 1991 JH4IFF OZ2SPACE -20 (x6) 202245 -20 1419 OJ0YL JH4IFF PM74 (x2) 202715 -9 509 <...> JH4IFF PM74
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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