OH4UI — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Finland Most frequent locator attributed to this token: KP10

Receiver-side FT8 activity involving OH4UI, decoded by SO8OO in southeastern Poland. 212 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 10m, across 9 UTC dates in the available aggregate history. Observed between 2026-06-16 and 2026-09-01.

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 212 FT8 messages attributed to OH4UI as the transmitting token by decoded message structure across 9 UTC dates in the available aggregate history. The largest monitored-band total was 160 m (72%), followed by 40 m (19%) and 80 m (7%). Most decodes (87%) fell within the six-hour window 18:00-00:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -11 dB.

Overview

212
Messages attributed
9
UTC dates decoded
47
Active 15-min windows
-11 dB
Estimated median S/N

Bands

160m · 152 80m · 14 40m · 40 10m · 6
First attributed message: 2026-06-16
Last attributed message: 2026-09-01 22:52 UTC

Observed FT8 message patterns

Attributed sample
212 messages
Active dates
9 UTC dates
Estimated median S/N
-11 dB
Estimated 10th-90th percentile
-20 to -3 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 45, moderate (-15 to -9 dB) 91, strong (≥ -8 dB) 76.

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 OH4UI 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 OH4UI

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
KP10 · 126 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,177 km (approx.)
Last such locator decoded
2026-09-01 22:52 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 UTCBandOH4UI S/NCounterpartCounterpart S/NMsgsCapture
09-01 22:50 160m -13 / - BG0DLA - / - 4 Partial capture
09-01 22:46 160m -22 / -12 OK1XD -7 / 0 4 ✓ Full exchange observed
09-01 22:46 160m -20 / -10 OM3PC +15 / +10 7 ✓ Full exchange observed
09-01 22:42 160m -22 / - BG0DLA - / - 4 Partial capture
09-01 22:09 160m -19 / - YE9BJM - / - 4 Partial capture
09-01 20:19 160m -18 / - F5RQQ - / - 2 Partial capture
09-01 20:13 160m -10 / - EI8IQ - / -19 3 ✓ Closing fragment
09-01 19:59 160m -13 / - 5Z4VJ - / -15 9 Partial capture
09-01 19:53 160m -16 / - SP0LPR - / -22 3 Partial capture
09-01 19:38 160m -16 / - OH2CLX +5 / - 2 ✓ Closing observed
09-01 19:38 160m - / - F4FTV -5 / - 2 Partial capture
09-01 19:22 160m - / -12 SP9KR +14 / - 3 ✓ Closing fragment
09-01 19:20 160m - / -15 RN3TT -2 / - 3 ✓ Closing fragment
09-01 19:12 160m - / - OE4MQW -4 / - 2 Partial capture
09-01 19:11 160m -9 / -7 EW6X -10 / +4 5 ✓ Full exchange observed
09-01 18:57 160m -12 / - RD9D - / - 2 Partial capture
08-31 22:12 160m -10 / - UA3FH - / -12 2 ✓ Closing fragment
08-31 21:14 160m -12 / - IK0XBX - / - 2 Partial capture
08-31 21:09 160m -8 / -10 SN6P +1 / 0 6 ✓ Full exchange observed
08-31 21:09 160m -14 / - YB5QZ - / - 2 Partial capture
08-31 21:05 160m -18 / -1 RA3WY -7 / - 5 ✓ Full exchange observed
08-31 21:03 160m -9 / -18 EA5YI -22 / -12 7 ✓ Full exchange observed
08-31 20:58 160m -12 / -19 EA4HPY -24 / -6 4 ✓ Full exchange observed
08-30 23:33 160m -16 / - UB3PAQ - / -2 2 ✓ Closing fragment
08-30 23:31 160m -17 / - UB9MEU - / -10 3 ✓ Closing fragment
08-30 23:25 160m -10 / - EA8AR - / - 3 Partial capture
08-30 23:12 160m -5 / - G8FAT - / -23 3 ✓ Closing fragment
08-30 23:08 160m -9 / - MW0DNF - / -13 3 ✓ Closing fragment
08-30 22:29 160m -15 / - RI1FJL - / - 4 Partial capture
08-30 21:42 160m -23 / - RI1FJL - / - 3 Partial capture
08-30 21:17 160m -20 / -13 SO5WD -1 / -6 4 ✓ Full exchange observed
08-30 21:16 160m -16 / - RA9YTI -13 / - 2 ✓ Closing observed
08-30 21:05 160m -6 / - RI1FJL - / - 3 Partial capture
08-30 20:43 160m -9 / - RI1FJL - / - 4 Partial capture
08-30 20:36 160m -5 / - RI1FJL - / -22 5 Partial capture
08-30 20:15 160m -12 / +7 SP3BPU +10 / - 6 ✓ Full exchange observed
08-30 20:14 160m -14 / - RY6O -15 / -2 3 ✓ Closing observed
08-30 20:13 160m -12 / -6 EI2CN +2 / +10 5 ✓ Full exchange observed
08-30 20:05 160m - / -12 RA6FYL -8 / - 2 Partial capture
08-30 20:05 160m - / -14 UD8S -16 / - 2 ✓ Closing fragment
08-30 20:05 160m -14 / -6 R3ZMM +3 / 0 4 ✓ Full exchange observed
08-30 19:50 160m -12 / - OK8AW 0 / -1 7 ✓ Closing observed
08-30 19:50 160m -10 / -17 RL3F -6 / +1 6 ✓ Full exchange observed
08-30 19:48 160m -9 / - RA3TOS - / -22 4 ✓ Closing fragment
08-30 19:46 160m -3 / -10 RN3QTS +5 / +1 7 ✓ Full exchange observed
08-30 19:46 160m -6 / -19 UA4CKN -15 / -3 6 ✓ Full exchange observed
08-30 19:33 160m -8 / - RI1FJL - / - 3 Partial capture
08-30 19:18 160m -19 / - RI1FJL - / - 6 Partial capture
08-30 19:08 160m -10 / - UA9CMN - / -9 3 Partial capture
08-30 18:21 160m -12 / -13 HF5A -4 / +7 4 ✓ Full exchange observed

Recent FT8 messages decoded at SO8OO

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

160m 
UTC    dB Audio  Message
224615  -8 2150  OH4UI OK1XD -12
224630 -20 1980  OK1XD OH4UI R+00
224645 +14 2248  OH4UI OM3PC JN98
224645  -6 2150  OH4UI OK1XD RR73
224700 -24 1980  OK1XD OH4UI 73
224715 +17 2248  OH4UI OM3PC JN98
224730 -18 1980  OM3PC OH4UI +10
224745 +15 2248  OH4UI OM3PC R-10
224800 -21 1980  OM3PC OH4UI RR73
224815 +12 2248  OH4UI OM3PC 73
224830 -24 1980  F1PBZ OH4UI R-11
225000 -12 1048  BG0DLA OH4UI KP10 (x4)
80m 
UTC    dB Audio  Message
193200  +4  659  RK9DO OH4UI KP10 (x2)
193300  +2  659  VK4XK OH4UI KP10 (x2)
195145  -5 1645  IR7MGGC OH4UI KP10
195200  -4 1501  OH4UI OZ/KD0NDU -12
201245  -1  557  RI1FJL OH4UI KP10 (x6)
205015  +3  755  <...> OH4UI KP10
205445  +2  755  RK9DO OH4UI KP10 (x2)
10m 
UTC    dB Audio  Message
185715  -6  362  5A1AL OH4UI KP10 (x4)
190245  -9  813  DN9AST OH4UI -12 (x2)
40m 
UTC    dB Audio  Message
230715  -7  640  TN8GD OH4UI KP10 (x3)
231045  -8  285  CX2SA OH4UI -24 (x2)
231530 -12  285  8P6GY OH4UI KP10
160545 -13  839  RI1PC OH4UI KP10 (x2)
160915  -9  317  T22TT OH4UI KP10 (x2)
161045  -8  317  RI1PC OH4UI KP10 (x2)
161315 -23 1655  T22TT OH4UI KP10

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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