JY4CH — 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 JY4CH, decoded by SO8OO in southeastern Poland. 93 FT8 messages attributed to this token as transmitter, on 40m, across 2 UTC dates in the available aggregate history. Observed between 2026-08-21 and 2026-10-10.
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 93 FT8 messages attributed to JY4CH as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (100%). In this small sample, the estimated median decoder S/N was -13 dB; no usual signal pattern is inferred.
Overview
Observed FT8 message patterns
- Attributed sample
- 93 messages
- Active dates
- 2 UTC dates
- Estimated median S/N
- -13 dB
- Estimated 10th-90th percentile
- -16 to -10 dB
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 10, moderate (-15 to -9 dB) 80, strong (≥ -8 dB) 3.
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 JY4CH in decoded directed-looking exchanges:
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 | JY4CH S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-10 19:16 | 40m | -14 / - | SP9NVY | - / -22 | 2 | ✓ Closing fragment |
| 10-10 19:15 | 40m | -12 / - | OE1HOW | - / -18 | 2 | Partial capture |
| 10-10 19:13 | 40m | -12 / - | Z31B | - / -6 | 2 | ✓ Closing fragment |
| 10-10 19:13 | 40m | - / - | 4Z5JO | -12 / - | 2 | Partial capture |
| 10-10 19:12 | 40m | -12 / - | UA4FEN | - / -13 | 2 | ✓ Closing fragment |
| 10-10 19:11 | 40m | -14 / - | OE3UKW | - / -18 | 2 | ✓ Closing fragment |
| 10-10 19:10 | 40m | -16 / - | JI4JKO | - / -20 | 2 | ✓ Closing fragment |
| 10-10 19:09 | 40m | -14 / -11 | OM1AN | -14 / -16 | 4 | ✓ Full exchange observed |
| 10-10 19:07 | 40m | -11 / - | IZ8PPI | - / -20 | 2 | Partial capture |
| 10-10 19:06 | 40m | -14 / - | EA7HG | - / -17 | 2 | Partial capture |
| 10-10 19:03 | 40m | -14 / -12 | EA1IQM | -15 / -16 | 8 | ✓ Full exchange observed |
| 10-10 19:03 | 40m | - / -16 | EA7HG | -10 / - | 2 | Partial capture |
| 09-15 17:12 | 60m | - / - | DM5KK | -8 / - | 3 | Partial capture |
| 08-26 15:40 | 10m | - / -3 | CT3MD | +6 / - | 5 | ✓ Closing fragment |
| 08-26 15:40 | 10m | - / - | CT3KU | -13 / - | 2 | ✓ Closing fragment |
| 08-21 01:38 | 40m | -11 / - | RA3LCI | - / -16 | 3 | ✓ Closing fragment |
| 08-21 01:37 | 40m | -10 / - | IZ8PPI | - / -12 | 2 | Partial capture |
| 08-21 01:35 | 40m | -10 / - | KS9J | -12 / -16 | 3 | ✓ Closing observed |
| 08-21 01:34 | 40m | -7 / - | IU1VJP | -17 / - | 4 | ✓ Closing observed |
| 08-21 01:32 | 40m | -12 / - | UN9LCW | - / -15 | 2 | Partial capture |
| 08-21 01:31 | 40m | -12 / - | WP4TUN | - / -18 | 2 | Partial capture |
| 08-21 01:30 | 40m | -12 / - | EA5XA | - / -18 | 2 | ✓ Closing fragment |
| 08-21 01:29 | 40m | - / - | KD4DC | -14 / - | 3 | Partial capture |
| 08-21 01:28 | 40m | -14 / -9 | RK6MC | +6 / -11 | 5 | ✓ Full exchange observed |
| 08-21 01:27 | 40m | -12 / - | UA9CR | - / -12 | 2 | ✓ Closing fragment |
| 08-21 01:26 | 40m | - / -13 | EN35UKR | -2 / - | 2 | Partial capture |
| 08-21 01:26 | 40m | - / - | RK6MC | +5 / - | 2 | Partial capture |
| 08-21 01:24 | 40m | -12 / - | DJ0MAB | - / -17 | 4 | ✓ Closing fragment |
| 08-21 01:21 | 40m | -12 / -13 | WO2T | -8 / -16 | 9 | ✓ Full exchange observed |
| 08-21 01:20 | 40m | -16 / - | KB4DFK | - / -16 | 2 | Partial capture |
| 08-21 01:19 | 40m | -14 / -11 | EI2IXB | +7 / -15 | 4 | ✓ Full exchange observed |
| 08-21 01:16 | 40m | - / -4 | OJ0JR | -4 / - | 2 | ✓ Closing fragment |
| 08-21 01:15 | 40m | - / -7 | RO6G | -20 / - | 2 | Partial capture |
| 08-21 01:14 | 40m | -14 / - | RD9U | - / -16 | 2 | ✓ Closing fragment |
| 08-21 01:14 | 40m | - / - | RK6MC | +4 / - | 2 | Partial capture |
| 08-21 01:13 | 40m | -15 / - | FM4TI | - / -18 | 2 | ✓ Closing fragment |
| 08-21 01:11 | 40m | -15 / - | US1CR | -7 / -22 | 2 | Partial capture |
| 08-21 01:08 | 40m | -12 / -9 | EA3EDU | -10 / -11 | 8 | ✓ Full exchange observed |
| 08-21 01:07 | 40m | -14 / - | YV5AEZ | - / -15 | 2 | ✓ Closing fragment |
| 08-21 01:07 | 40m | -13 / -21 | K6RO | +2 / -8 | 12 | ✓ Full exchange observed |
| 08-21 01:06 | 40m | -12 / -8 | PY5XT | -5 / -11 | 11 | ✓ Full exchange observed |
| 08-21 01:06 | 40m | -15 / -7 | OK1AMF | -2 / -11 | 4 | ✓ Full exchange observed |
| 08-21 01:05 | 40m | -12 / -8 | VP2MAA | -9 / -9 | 5 | ✓ Full exchange observed |
| 08-21 01:04 | 40m | -13 / - | EA5GHE | -18 / -16 | 3 | ✓ Closing observed |
| 08-21 01:03 | 40m | -15 / - | AA4R | - / -18 | 3 | Partial capture |
| 08-21 01:02 | 40m | -14 / -5 | S57ANA | -10 / -7 | 4 | ✓ Full exchange observed |
| 08-21 01:01 | 40m | -12 / -18 | WA8LRW | -15 / -17 | 3 | ✓ Full exchange observed |
| 08-21 00:59 | 40m | -11 / - | VP2MAA | - / -9 | 3 | Partial capture |
| 08-21 00:56 | 40m | -11 / -4 | F5PBG | -5 / - | 4 | ✓ Closing observed |
| 08-21 00:53 | 40m | -16 / -7 | HA0AA | -6 / - | 5 | ✓ Closing observed |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 191100 -14 1130 JI4JKO JY4CH RR73 191130 -13 1129 OE3UKW JY4CH R-18 (x2) 191230 -14 1129 UA4FEN JY4CH R-13 (x2) 191300 -12 1506 JY4CH 4Z5JO 191330 -14 1129 Z31B JY4CH R-06 191330 -13 1506 JY4CH 4Z5JO 191400 -11 1129 Z31B JY4CH 73 191500 -11 1129 OE1HOW JY4CH -18 (x2) 191600 -14 1128 SP9NVY JY4CH -22 (x2) 191700 -9 1128 PD3EM JY4CH -19 192030 -15 1128 OM1TD JY4CH -22
UTC dB Audio Message 171215 -7 1675 JY4CH DM5KK JO60 (x3)
UTC dB Audio Message 145145 -13 1543 JY4CH CT3IQ IM12 154000 -12 2426 JY4CH CT3KU IM12 154030 +5 903 JY4CH CT3MD IM13 (x3) 154130 -14 2425 JY4CH CT3KU 73 154200 +8 903 JY4CH CT3MD R-03 (x2) 182615 -9 376 JY4CH G0HVQ 73
UTC dB Audio Message 211345 -15 2451 JY4CH EA1DDF IN73 211415 -3 708 JY4CH EA5RR IM98 (x4) 211615 -13 2354 JY4CH EA1AOC IN83 211645 -11 1299 JY4CH EA5RR IM98 211645 -15 1609 JY4CH EA1AOC IN83 (x6) 212245 -24 1601 JY4CH CT2IGO IN60 212345 -5 1467 JY4CH I5HLK R+06
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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