YT7TZ — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving YT7TZ, decoded by SO8OO in southeastern Poland. 498 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 9 UTC dates in the available aggregate history. Observed between 2026-06-15 and 2026-10-03.
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 498 FT8 messages attributed to YT7TZ as the transmitting token by decoded message structure across 9 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (74%), followed by 40 m (21%) and 80 m (4%). Most decodes (65%) fell within the six-hour window 03:00-09:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (81%); the estimated median was -1 dB.
Overview
Bands
Last attributed message: 2026-10-03 18:01 UTC
Observed FT8 message patterns
- Attributed sample
- 498 messages
- Active dates
- 9 UTC dates
- Estimated median S/N
- -1 dB
- Estimated 10th-90th percentile
- -11 to +12 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 20, moderate (-15 to -9 dB) 74, strong (≥ -8 dB) 404.
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 YT7TZ 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 YT7TZ
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
- KN05 · 252 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 497 km (approx.)
- Last such locator decoded
- 2026-10-03 18:01 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 | YT7TZ S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-04 11:34 | 10m | - / -17 | CR7CDR | -11 / - | 3 | ✓ Closing fragment |
| 10-04 11:20 | 10m | - / +9 | CT7AUT | -15 / - | 3 | ✓ Closing fragment |
| 10-03 18:00 | 40m | 0 / - | R1CBW | - / - | 3 | Partial capture |
| 10-03 17:58 | 40m | -1 / -14 | EW8AAC | -14 / -13 | 6 | ✓ Full exchange observed |
| 10-03 17:55 | 40m | -1 / - | EX7CQ | - / -10 | 5 | ✓ Closing fragment |
| 10-03 17:52 | 40m | 0 / -9 | R2SBI | 0 / -9 | 6 | ✓ Full exchange observed |
| 10-03 17:51 | 40m | 0 / - | UN3P | - / - | 2 | Partial capture |
| 10-03 17:50 | 40m | -1 / - | OZ5AGJ | -8 / -7 | 2 | ✓ Closing observed |
| 10-03 17:48 | 40m | +2 / - | S51PV | - / -7 | 3 | ✓ Closing fragment |
| 10-03 17:46 | 40m | +2 / -8 | PE1MHY | -1 / -8 | 6 | ✓ Full exchange observed |
| 10-03 17:46 | 40m | 0 / -7 | UX7QV | +10 / +6 | 5 | ✓ Full exchange observed |
| 10-03 17:44 | 40m | 0 / -1 | IK1MJK/P | -10 / -2 | 4 | ✓ Full exchange observed |
| 10-03 17:41 | 40m | +4 / - | F1PBZ | -10 / -19 | 2 | ✓ Closing observed |
| 10-03 17:40 | 40m | 0 / - | SQ9KWY | +5 / +2 | 4 | Partial capture |
| 10-03 17:39 | 40m | 0 / - | SP7TF | -6 / - | 2 | ✓ Closing observed |
| 10-03 17:37 | 40m | -2 / - | IU4PPL | - / -5 | 3 | ✓ Closing fragment |
| 10-03 17:36 | 40m | +3 / -8 | R6FX | -5 / -7 | 3 | ✓ Full exchange observed |
| 10-03 17:34 | 40m | +2 / +1 | EA8UP | -2 / -2 | 5 | ✓ Full exchange observed |
| 10-03 17:23 | 40m | +2 / - | UN3P | - / - | 3 | Partial capture |
| 10-03 17:15 | 80m | -3 / -1 | OE5DML | +8 / -7 | 6 | ✓ Full exchange observed |
| 10-03 17:10 | 80m | -2 / -25 | DL4DP | -13 / -22 | 9 | Partial capture |
| 10-03 17:07 | 80m | -5 / -2 | UA4FKT | +7 / -4 | 7 | ✓ Full exchange observed |
| 10-03 17:04 | 80m | -2 / - | RK6OQ | -6 / -12 | 3 | ✓ Closing observed |
| 10-03 17:02 | 80m | -10 / -4 | DC6NS | -4 / -17 | 6 | ✓ Full exchange observed |
| 08-30 08:27 | 20m | -11 / -9 | R3KAB | +8 / -5 | 3 | ✓ Full exchange observed |
| 08-30 08:26 | 20m | -8 / -21 | PD0JCH | -4 / -19 | 7 | ✓ Full exchange observed |
| 08-30 08:18 | 20m | - / - | F1BDD | -12 / - | 2 | Partial capture |
| 08-30 08:14 | 20m | -15 / -7 | ON7DE | +2 / -14 | 6 | ✓ Full exchange observed |
| 08-30 08:08 | 20m | -6 / 0 | R3KJF | +7 / +2 | 5 | ✓ Full exchange observed |
| 08-30 08:07 | 20m | -5 / - | SQ9CXH | - / +6 | 2 | ✓ Closing fragment |
| 08-30 08:04 | 20m | -7 / - | DC5QV | - / -17 | 5 | Partial capture |
| 08-30 08:01 | 20m | -15 / -21 | IQ4JO | -5 / -4 | 5 | ✓ Full exchange observed |
| 08-30 07:58 | 20m | -2 / - | IK0XBU/P | - / -14 | 5 | Partial capture |
| 08-30 07:57 | 20m | +2 / - | DL1HEW | - / -10 | 2 | ✓ Closing fragment |
| 08-30 07:55 | 20m | -2 / -9 | IZ2EWN | -6 / -2 | 4 | ✓ Full exchange observed |
| 08-30 07:54 | 20m | +3 / - | EU1AK | - / -11 | 2 | ✓ Closing fragment |
| 08-30 07:50 | 20m | -14 / -16 | ON7IM | +14 / - | 6 | ✓ Full exchange observed |
| 08-30 07:46 | 20m | -10 / - | EB3CGQ | - / -14 | 5 | Partial capture |
| 08-30 07:44 | 20m | -1 / -7 | PD1ADA | -3 / +5 | 4 | ✓ Full exchange observed |
| 08-30 07:42 | 20m | +4 / - | MI7RDK | -8 / -17 | 3 | Partial capture |
| 08-30 07:41 | 20m | - / - | PD1ADA | -8 / - | 2 | Partial capture |
| 08-30 07:41 | 20m | +7 / - | DL1YS | - / - | 2 | ✓ Closing fragment |
| 08-30 07:39 | 20m | +8 / +9 | 2W0YOX | -1 / -3 | 5 | ✓ Full exchange observed |
| 08-30 07:36 | 20m | +5 / -19 | F1EZC | -5 / -19 | 8 | Partial capture |
| 08-30 07:35 | 20m | +9 / - | UA3PAB | - / - | 2 | ✓ Closing fragment |
| 08-30 07:32 | 20m | +8 / -18 | RA4CEH | -11 / -19 | 6 | Partial capture |
| 08-30 07:31 | 20m | -7 / - | LZ2VQ | +1 / -17 | 4 | Partial capture |
| 08-30 07:30 | 20m | -4 / -8 | UA3VVA | +13 / - | 5 | ✓ Full exchange observed |
| 08-30 07:19 | 20m | +14 / -9 | R6OY | +18 / +1 | 5 | ✓ Full exchange observed |
| 08-30 07:18 | 20m | +18 / - | SH5RJX | - / - | 2 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 112030 -20 1475 YT7TZ CT7AUT IM67 (x3) 112900 -20 2029 YT7TZ UN7PNF RR73 113400 -11 958 YT7TZ CR7CDR IM58 (x3)
UTC dB Audio Message 175400 -3 896 R2SBI YT7TZ 73 175515 -1 896 EX7CQ YT7TZ KN05 (x5) 175815 +1 896 EW8AAC YT7TZ KN05 175830 -12 1725 YT7TZ EW8AAC -14 175845 -2 896 EW8AAC YT7TZ R-13 (x2) 175930 -16 1725 YT7TZ EW8AAC RR73 175945 -2 896 EW8AAC YT7TZ 73 180015 -1 896 R1CBW YT7TZ KN05 (x3)
UTC dB Audio Message 171115 -7 742 DL4DP YT7TZ -22 (x2) 171200 -2 741 YT7TZ DL4DP R-25 171215 -7 742 DL4DP YT7TZ -22 171300 -15 742 YT7TZ DL4DP R-25 (x2) 171415 -6 741 CQ YT7TZ KN05 (x2) 171500 +0 2447 YT7TZ OE5DML JN78 171515 -3 741 OE5DML YT7TZ -07 171530 +3 2447 YT7TZ OE5DML R-01 171545 -2 741 DL4DP YT7TZ RR73 171630 +12 2447 YT7TZ OE5DML R-01 (x3)
UTC dB Audio Message 082245 +7 2415 YT7TZ RA3ZDU KO90 082530 -21 2414 CQ YT7TZ KN05 (x2) 082615 -1 2415 YT7TZ PD0JCH JO11 082630 -7 2414 PD0JCH YT7TZ -19 082645 -5 2414 YT7TZ PD0JCH R-21 082700 -8 2414 PD0JCH YT7TZ -19 082715 -3 2416 YT7TZ PD0JCH R-21 082730 -8 2415 PD0JCH YT7TZ RR73 082745 +7 696 YT7TZ R3KAB -09 082745 -5 2415 YT7TZ PD0JCH 73 082800 -11 2414 R3KAB YT7TZ R-05 082815 +8 695 YT7TZ R3KAB RR73 083000 -5 2414 CQ YT7TZ KN05 083200 -2 2415 C31VM YT7TZ 73
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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