OT7K — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Belgium Most frequent locator attributed to this token: JO21

Receiver-side FT8 activity involving OT7K, decoded by SO8OO in southeastern Poland. 4,353 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 23 UTC dates in the available aggregate history. Observed between 2026-09-12 and 2026-10-11.

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 4,353 FT8 messages attributed to OT7K as the transmitting token by decoded message structure across 23 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (79%), followed by 80 m (21%). Most decodes (55%) 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 (99%); the estimated median was +8 dB.

Overview

4,353
Messages attributed
23
UTC dates decoded
192
Active 15-min windows
+8 dB
Estimated median S/N

Bands

80m · 906 40m · 3,447
First attributed message: 2026-09-12
Last attributed message: 2026-10-11 20:33 UTC

Observed FT8 message patterns

Attributed sample
4,353 messages
Active dates
23 UTC dates
Estimated median S/N
+8 dB
Estimated 10th-90th percentile
+1 to +17 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 32, moderate (-15 to -9 dB) 20, strong (≥ -8 dB) 4,301.

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 OT7K 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 OT7K

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
JO21 · 1,900 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,192 km (approx.)
Last such locator decoded
2026-10-11 20:11 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 UTCBandOT7K S/NCounterpartCounterpart S/NMsgsCapture
10-11 20:32 80m +18 / - JH7DDH - / -18 3 Partial capture
10-11 20:30 80m +18 / - JE4NAN - / -17 4 ✓ Closing fragment
10-11 20:29 80m +18 / - EW8DU 0 / -4 5 ✓ Full exchange observed
10-11 20:27 80m +17 / - JH1PXH - / -18 2 ✓ Closing fragment
10-11 20:26 80m +19 / - JA4ITW - / -16 2 ✓ Closing fragment
10-11 20:25 80m +22 / - JA0HXV - / -13 2 ✓ Closing fragment
10-11 20:25 80m - / - DL9KM -9 / - 7 Partial capture
10-11 20:24 80m +21 / - JH1CTV - / -17 2 ✓ Closing fragment
10-11 20:23 80m +18 / - JK1OZS -9 / +1 3 ✓ Closing observed
10-11 20:22 80m +20 / - JH4BYS - / -16 2 ✓ Closing fragment
10-11 20:21 80m +20 / - JA6LCJ -15 / -13 3 ✓ Closing observed
10-11 20:20 80m +18 / - JF1UVJ - / -16 2 ✓ Closing fragment
10-11 20:19 80m +21 / - JA5FDJ - / -17 2 ✓ Closing fragment
10-11 20:18 80m +22 / - JR3GWZ - / -18 2 ✓ Closing fragment
10-11 20:17 80m +21 / - JH7BKN - / -18 2 ✓ Closing fragment
10-11 20:16 80m +21 / - JE6URX - / -18 2 ✓ Closing fragment
10-11 20:16 80m - / +8 DK7ZT +9 / - 3 Partial capture
10-11 20:16 80m - / - IK4TVP -2 / - 4 Partial capture
10-11 20:15 80m +22 / - JE2DZC - / -19 2 ✓ Closing fragment
10-11 20:14 80m +21 / - JI4WAO - / -19 3 ✓ Closing fragment
10-11 20:13 80m +20 / - JH8RZJ - / -19 2 ✓ Closing fragment
10-11 20:13 80m - / +5 DK7ZT +10 / - 2 Partial capture
10-11 20:11 80m +22 / - OE1RDU/3 - / -18 2 Partial capture
10-11 20:08 80m +18 / - JA7FTR - / -13 3 ✓ Closing fragment
10-11 20:00 80m +21 / - JR2UBS - / -14 6 Partial capture
10-11 19:55 80m - / - E70SZ +15 / - 9 Partial capture
10-11 19:55 80m - / - SQ8AA 0 / - 2 Partial capture
10-11 19:53 80m - / -9 DK7ZT +7 / - 3 Partial capture
10-11 19:53 80m +20 / - JA7BXS - / -17 2 ✓ Closing fragment
10-11 19:52 80m +18 / - JA4TKY - / - 2 Partial capture
10-11 19:50 80m - / - DK7UY -2 / - 2 Partial capture
10-11 19:49 80m +19 / - RC9WC - / -10 2 ✓ Closing fragment
10-10 21:26 80m +19 / - JA4TKY - / -18 4 Partial capture
10-10 21:22 80m +20 / - JA9GLW - / -17 8 ✓ Closing fragment
10-10 21:14 80m +14 / - S79VU - / -13 7 Partial capture
10-10 21:10 80m +18 / - JA4TKY - / -14 3 Partial capture
10-10 21:04 80m - / - DL1UDO -1 / - 4 Partial capture
10-10 21:02 80m +18 / - JA9XRL - / -13 4 Partial capture
10-10 20:59 80m - / - ON4MAP -7 / - 6 Partial capture
10-10 20:56 80m +22 / - US2YW 0 / -11 3 Partial capture
10-10 20:55 80m +18 / - PY2WC - / -12 2 ✓ Closing fragment
10-10 20:52 80m - / - US2YW -1 / - 3 Partial capture
10-10 20:47 80m +22 / - JA4TKY - / -12 2 Partial capture
10-10 20:46 80m +24 / - JH5FXP - / -10 2 ✓ Closing fragment
10-10 20:46 80m - / - DL6AZ -22 / - 2 Partial capture
10-10 20:45 80m - / -2 YO7LMU -4 / - 3 Partial capture
10-10 20:37 80m +20 / - JH3GFA - / -13 2 Partial capture
10-10 20:36 80m +18 / - JF1FSR - / -15 2 ✓ Closing fragment
10-10 20:32 80m +19 / - JA4TKY - / -16 5 Partial capture
10-10 20:28 80m +19 / - UA9SY - / -17 2 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

Frequency values are decoder audio offsets in hertz, not RF frequencies.

80m 
UTC    dB Audio  Message
202830  -2 1424  OT7K DL9KM JN68
202900  -1  500  OT7K EW8DU KO52
202915 +17  501  JA0DOW OT7K RR73
202945 +18  501  EW8DU OT7K -04
203000  +3  501  OT7K EW8DU R+14
203015 +17  501  EW8DU OT7K RR73
203030  -2  501  OT7K EW8DU 73
203045 +22  501  JE4NAN OT7K -17 (x4)
203230 -12  500  OT7K G3TKT IO92
203245 +18  501  JH7DDH OT7K -18 (x3)
40m 
UTC    dB Audio  Message
185930 -16 1279  OT7K PD3WMA JO22
185945 +18  472  VK2LAW OT7K -06 (x2)
190045 +17  472  CQ OT7K JO21
190115 +15  472  UA9QFF OT7K -05 (x2)
190215 +14  472  RT3K/P OT7K -09 (x4)
190615 +16  472  V51WH OT7K -16 (x5)

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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