YV5CHJ — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving YV5CHJ, decoded by SO8OO in southeastern Poland. 26 FT8 messages attributed to this token as transmitter, on 20m, across 2 UTC dates in the available aggregate history. Observed between 2026-06-18 and 2026-08-23.
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 26 FT8 messages attributed to YV5CHJ as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). In this small sample, the estimated median decoder S/N was -9 dB; no usual signal pattern is inferred.
Overview
Observed FT8 message patterns
- Attributed sample
- 26 messages
- Active dates
- 2 UTC dates
- Estimated median S/N
- -9 dB
- Estimated 10th-90th percentile
- -10 to -7 dB
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 13, strong (≥ -8 dB) 13.
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 YV5CHJ in decoded directed-looking exchanges:
Most frequent locator attributed to YV5CHJ
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
- FK60 · 11 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 9,030 km (approx.)
- Last such locator decoded
- 2026-08-23 23:40 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 | YV5CHJ S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 08-23 23:38 | 20m | - / - | IW4EHZ | -4 / - | 6 | Partial capture |
| 08-23 23:38 | 20m | - / - | VE3NVK | -7 / - | 3 | Partial capture |
| 08-23 20:47 | 20m | - / - | DG5PW | -3 / - | 3 | Partial capture |
| 08-23 20:44 | 20m | - / - | M9VVE | +3 / - | 11 | Partial capture |
| 08-23 20:43 | 20m | - / -2 | CS7ADA | -2 / - | 3 | ✓ Closing fragment |
| 08-23 20:42 | 20m | - / - | 2E0BTX | -12 / - | 6 | Partial capture |
| 08-23 20:40 | 20m | - / - | IK2JBY | -1 / - | 2 | ✓ Closing fragment |
| 08-21 22:41 | 20m | - / - | F4MOI | -4 / - | 2 | Partial capture |
| 08-20 22:23 | 20m | - / -9 | EA7AQY | -16 / - | 5 | ✓ Closing fragment |
| 08-20 21:55 | 20m | - / - | EI7LK | +13 / - | 3 | Partial capture |
| 08-20 21:53 | 20m | - / - | PA1AA | -8 / - | 3 | Partial capture |
| 08-20 21:48 | 20m | - / -2 | UT7UJ | +7 / - | 2 | ✓ Closing fragment |
| 08-20 21:46 | 20m | - / -4 | EA2WX | -14 / - | 3 | ✓ Closing fragment |
| 08-20 21:45 | 20m | - / -16 | UA6ADU | -4 / - | 7 | Partial capture |
| 08-20 21:42 | 20m | - / -2 | ON3BEN | -13 / - | 6 | ✓ Closing fragment |
| 08-20 21:42 | 20m | - / - | IK4LZH | 0 / - | 3 | ✓ Closing fragment |
| 08-11 20:46 | 10m | - / - | IK4LZH | -9 / - | 3 | Partial capture |
| 08-11 20:42 | 10m | - / - | IK4LZH | -8 / - | 2 | Partial capture |
| 08-11 20:35 | 10m | - / - | IZ7UIU | -8 / - | 3 | Partial capture |
| 08-11 20:12 | 20m | - / - | EA3GXK | -18 / - | 2 | Partial capture |
| 08-10 23:25 | 20m | - / -23 | UA6CE | -7 / - | 2 | ✓ Closing fragment |
| 08-10 23:20 | 20m | - / -18 | PD0RCQ | -18 / - | 2 | Partial capture |
| 08-06 22:26 | 20m | - / - | G5GMN | -21 / - | 3 | ✓ Closing fragment |
| 08-06 22:22 | 20m | - / -19 | DL0BSO | -11 / - | 5 | ✓ Closing fragment |
| 08-06 22:19 | 20m | - / - | DL0BSO | -12 / - | 2 | Partial capture |
| 08-06 22:18 | 20m | - / - | PD1RON | -16 / - | 2 | Partial capture |
| 08-06 22:12 | 20m | - / -15 | EA3AKA | -13 / - | 3 | ✓ Closing fragment |
| 08-06 21:53 | 20m | - / - | PG2V | -21 / - | 2 | ✓ Closing fragment |
| 08-06 21:50 | 20m | - / - | PD4HC | -16 / - | 2 | Partial capture |
| 08-06 21:49 | 20m | - / - | DL1R | +1 / - | 2 | ✓ Closing fragment |
| 08-06 21:40 | 20m | - / - | DG2BBG | -10 / - | 5 | Partial capture |
| 08-06 21:40 | 20m | - / - | DH2RL | -4 / - | 3 | Partial capture |
| 08-06 21:34 | 20m | - / - | DH2RL | -5 / - | 6 | Partial capture |
| 08-06 21:30 | 20m | - / - | DH2RL | -4 / - | 2 | Partial capture |
| 08-06 21:26 | 20m | - / - | IW3RQT | +11 / - | 3 | Partial capture |
| 08-06 20:31 | 20m | - / -11 | RA3GZ | -7 / - | 2 | ✓ Closing fragment |
| 08-06 20:18 | 20m | - / -16 | F4LNQ | -13 / - | 4 | ✓ Closing fragment |
| 07-20 23:42 | 20m | - / - | YO7ARZ | -14 / - | 2 | Partial capture |
| 07-20 23:40 | 20m | - / +4 | IK4LZH | -10 / - | 2 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 205145 -8 683 YV5CHJ M9VVE IO93 233830 -9 1046 CQ YV5CHJ FK60 233845 -8 1046 YV5CHJ VE3NVK FN25 233845 +4 635 YV5CHJ IW4EHZ JN54 233915 -7 1046 YV5CHJ VE3NVK FN25 233915 +0 860 YV5CHJ IW4EHZ JN54 233930 -7 1045 N4UHZ YV5CHJ RR73 233945 -6 1046 YV5CHJ VE3NVK FN25 233945 -6 860 YV5CHJ IW4EHZ JN54 234000 -9 1045 CQ YV5CHJ FK60 234015 -6 1126 YV5CHJ IW4EHZ JN54 (x2) 234045 -8 632 YV5CHJ I0PAX JN61 234100 -6 1045 K4WYC YV5CHJ -06 234115 -13 1269 YV5CHJ IW4EHZ JN54
UTC dB Audio Message 203215 -17 1029 YV5CHJ SV1MOZ KM17 203545 -9 1028 YV5CHJ IZ7UIU JN80 (x3) 204215 -6 492 YV5CHJ IK4LZH JN54 (x5)
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