YB1TJ — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving YB1TJ, decoded by SO8OO in southeastern Poland. 101 FT8 messages attributed to this token as transmitter, on 80m, across 6 UTC dates in the available aggregate history. Observed between 2026-06-21 and 2026-09-03.
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 101 FT8 messages attributed to YB1TJ as the transmitting token by decoded message structure across 6 UTC dates in the available aggregate history. The largest monitored-band total was 80 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 -15 dB.
Overview
Observed FT8 message patterns
- Attributed sample
- 101 messages
- Active dates
- 6 UTC dates
- Estimated median S/N
- -15 dB
- Estimated 10th-90th percentile
- -22 to -10 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 49, moderate (-15 to -9 dB) 47, strong (≥ -8 dB) 5.
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 YB1TJ 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 YB1TJ
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
- OI33 · 38 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 10,219 km (approx.)
- Last such locator decoded
- 2026-09-03 22:55 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 | YB1TJ S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-08 22:45 | 80m | - / -14 | RC9WC | +4 / - | 2 | ✓ Closing fragment |
| 09-08 22:07 | 80m | - / -18 | ON6AA | +7 / - | 5 | ✓ Closing fragment |
| 09-04 16:12 | 80m | - / +1 | OH1MLZ | -1 / - | 3 | ✓ Closing fragment |
| 09-04 16:10 | 80m | - / -17 | UR4LRG | +12 / - | 2 | ✓ Closing fragment |
| 09-04 16:07 | 80m | - / -18 | YO7CFD | +17 / - | 6 | ✓ Closing fragment |
| 09-04 16:03 | 80m | - / -8 | LY7M | +10 / - | 3 | ✓ Closing fragment |
| 09-04 16:03 | 80m | - / -10 | OH4BW | -5 / - | 7 | ✓ Closing fragment |
| 09-04 16:01 | 80m | - / -14 | RW9AW | -10 / - | 4 | ✓ Closing fragment |
| 09-03 22:54 | 80m | -16 / - | RI1FJL | - / - | 2 | Partial capture |
| 08-29 23:05 | 80m | - / -11 | ON4CMT | -6 / - | 2 | ✓ Closing fragment |
| 08-29 23:03 | 80m | - / - | G3KMQ | 0 / - | 2 | Partial capture |
| 08-29 23:02 | 80m | - / -16 | DK5WL | +2 / - | 4 | ✓ Closing fragment |
| 08-29 23:01 | 80m | -23 / -17 | UF4S | +7 / -21 | 3 | ✓ Full exchange observed |
| 08-29 22:54 | 80m | - / - | DK5WL | +6 / - | 3 | Partial capture |
| 06-28 23:02 | 80m | - / -14 | CT7AUT | -16 / - | 4 | ✓ Closing fragment |
| 06-28 23:01 | 80m | -18 / -6 | CT3KN | -14 / - | 3 | ✓ Closing observed |
| 06-28 22:57 | 80m | -16 / - | 9J2FI | - / -22 | 2 | ✓ Closing fragment |
| 06-28 22:49 | 80m | -10 / - | <...> | - / -18 | 2 | Partial capture |
| 06-28 22:43 | 80m | -15 / -13 | YL2NX | +4 / -10 | 7 | ✓ Full exchange observed |
| 06-28 22:39 | 80m | -12 / -20 | DL3CY | +10 / -18 | 8 | ✓ Full exchange observed |
| 06-27 21:36 | 80m | -20 / -10 | SV2AEL | +6 / -14 | 6 | ✓ Full exchange observed |
| 06-27 21:33 | 80m | -18 / -15 | 5P1KZX | 0 / -16 | 6 | ✓ Full exchange observed |
| 06-27 21:33 | 80m | -22 / -16 | S57UX | +7 / -15 | 7 | ✓ Full exchange observed |
| 06-27 21:32 | 80m | -17 / - | EA7L | - / -11 | 2 | ✓ Closing fragment |
| 06-27 21:32 | 80m | -18 / - | G0OYQ | -9 / -15 | 4 | Partial capture |
| 06-27 21:32 | 80m | - / - | SP9MRP | +10 / - | 2 | Partial capture |
| 06-27 21:23 | 80m | -16 / -17 | F6BHK | -16 / -2 | 4 | ✓ Full exchange observed |
| 06-27 21:21 | 80m | - / - | SP7MOQ | +13 / - | 3 | Partial capture |
| 06-27 21:21 | 80m | - / - | SP5ILO | +11 / - | 2 | Partial capture |
| 06-27 21:20 | 80m | -19 / -7 | IS0AFM | -6 / - | 3 | ✓ Closing observed |
| 06-27 21:18 | 80m | - / - | RV3X | +3 / - | 5 | Partial capture |
| 06-27 21:17 | 80m | - / - | SP9MRP | +12 / - | 6 | Partial capture |
| 06-27 21:17 | 80m | - / - | DO1MDO | -6 / - | 6 | Partial capture |
| 06-27 21:17 | 80m | - / - | HA7GSZ | +8 / - | 5 | Partial capture |
| 06-27 21:13 | 80m | -10 / -15 | UT5ZC | +6 / -13 | 7 | ✓ Full exchange observed |
| 06-27 21:13 | 80m | - / -17 | F1PBZ | -21 / - | 3 | Partial capture |
| 06-27 21:13 | 80m | -14 / -18 | RU3DNN | -1 / -20 | 5 | ✓ Full exchange observed |
| 06-27 21:13 | 80m | - / - | SP5ILO | +6 / - | 7 | Partial capture |
| 06-27 21:13 | 80m | - / - | SP7MOQ | +12 / - | 5 | Partial capture |
| 06-27 21:12 | 80m | - / - | SP9MRP | +16 / - | 3 | Partial capture |
| 06-27 21:11 | 80m | -17 / - | <...> | - / - | 3 | Partial capture |
| 06-27 21:04 | 80m | -18 / -13 | DL3CY | +11 / -18 | 7 | ✓ Full exchange observed |
| 06-27 21:03 | 80m | -16 / -17 | OH2BGD | +10 / -19 | 7 | ✓ Full exchange observed |
| 06-27 21:03 | 80m | -19 / -21 | RK3AQ | -3 / - | 2 | ✓ Closing observed |
| 06-27 21:03 | 80m | - / - | DO5UH/P | +3 / - | 5 | Partial capture |
| 06-27 21:03 | 80m | -18 / -18 | R3BDQ | -3 / -24 | 12 | ✓ Full exchange observed |
| 06-27 20:59 | 80m | - / - | LY4PR | -18 / - | 2 | Partial capture |
| 06-27 20:57 | 80m | - / -21 | R3BDQ | 0 / - | 3 | Partial capture |
| 06-27 20:57 | 80m | - / - | SP9OJ | +13 / - | 3 | Partial capture |
| 06-27 20:56 | 80m | - / - | EA5RR | -10 / - | 3 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 160945 +18 720 YB1TJ YO7CFD R-18 (x2) 161015 +9 453 YB1TJ UR4LRG -17 (x2) 161215 +0 859 YB1TJ OH1MLZ KP23 (x3) 220730 +7 1946 YB1TJ ON6AA JO11 (x5) 224500 +7 803 YB1TJ RC9WC -14 (x2) 225630 -1 765 YB1TJ R6ZEJ KN98
UTC dB Audio Message 001615 -2 2553 YB1TJ IQ4JO JN63
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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