OH5XH — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Finland Most frequent locator attributed to this token: KP30

Receiver-side FT8 activity involving OH5XH, decoded by SO8OO in southeastern Poland. 79 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 11 UTC dates in the available aggregate history. Observed between 2026-06-13 and 2026-09-20.

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 79 FT8 messages attributed to OH5XH as the transmitting token by decoded message structure across 11 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (87%), followed by 20 m (6%) and 40 m (5%). Several six-hour UTC windows tied for the largest share (97%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (77%); the estimated median was -2 dB.

Overview

79
Messages attributed
11
UTC dates decoded
18
Active 15-min windows
-2 dB
Estimated median S/N

Bands

80m · 69 40m · 4 20m · 5 10m · 1
First attributed message: 2026-06-13
Last attributed message: 2026-09-20 01:11 UTC

Observed FT8 message patterns

Attributed sample
79 messages
Active dates
11 UTC dates
Estimated median S/N
-2 dB
Estimated 10th-90th percentile
-13 to +6 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 4, moderate (-15 to -9 dB) 14, strong (≥ -8 dB) 61.

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 OH5XH 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 OH5XH

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
KP30 · 28 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,219 km (approx.)
Last such locator decoded
2026-09-20 01:11 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 UTCBandOH5XH S/NCounterpartCounterpart S/NMsgsCapture
09-20 01:10 80m +1 / - K2PL - / - 3 Partial capture
09-20 00:49 80m 0 / - AG2K - / -14 3 Partial capture
09-20 00:45 80m +1 / +3 OH6Z -12 / -2 5 ✓ Full exchange observed
09-16 01:23 80m -12 / - RI1FJZ - / - 3 Partial capture
09-09 00:44 80m +2 / - LA1XFA +2 / +6 4 ✓ Full exchange observed
09-09 00:39 80m 0 / - PY6HD - / -7 4 Partial capture
09-09 00:33 80m 0 / - R4CHQ -13 / -4 4 ✓ Closing observed
09-09 00:32 80m -1 / -4 R4HHN +4 / +6 4 ✓ Full exchange observed
09-09 00:31 80m +2 / -21 AP2HA -14 / -12 5 ✓ Full exchange observed
09-09 00:25 80m -10 / +1 SM6EHY +9 / +5 5 ✓ Full exchange observed
09-08 01:51 80m -9 / -10 9A5E +14 / +10 7 ✓ Full exchange observed
09-08 01:51 80m -4 / -12 LZ3RG +10 / - 5 ✓ Closing observed
09-08 01:49 80m - / -5 DL9KM -5 / - 2 Partial capture
09-08 01:48 80m -2 / -7 SV8JE +22 / +9 6 ✓ Full exchange observed
09-04 02:45 80m -3 / - W9HT - / +4 4 Partial capture
09-02 01:30 80m +6 / +1 UY0HY -1 / +3 5 ✓ Full exchange observed
09-02 01:27 80m +4 / -11 G3WGC +5 / -1 6 ✓ Full exchange observed
09-02 01:26 80m +7 / - EA3EDU -10 / -7 4 ✓ Closing observed
09-02 01:25 80m +3 / -8 EA1CQ -16 / -4 5 ✓ Full exchange observed
09-02 01:23 80m +1 / - LU3CQ - / -7 5 ✓ Closing fragment
09-02 01:13 80m +3 / +2 DO9BAU +7 / +10 6 ✓ Full exchange observed
09-02 01:12 80m -2 / -2 RI1FJL -12 / +7 3 ✓ Full exchange observed
08-28 02:57 80m -8 / -17 VA1TTY -6 / -3 6 ✓ Full exchange observed
08-28 02:11 20m - / -4 KZ4NS -11 / - 3 Partial capture
08-24 23:39 20m - / -7 XQ1KK 0 / - 3 ✓ Closing fragment
08-08 01:51 40m -14 / - OA4ENG - / -11 2 ✓ Closing fragment
07-15 05:25 20m - / -2 RA3TVW -19 / - 2 Partial capture
07-06 10:02 20m - / 0 4U1GSC -11 / - 2 ✓ Closing fragment
07-03 22:19 20m - / - EI7GSB -6 / - 2 ✓ Closing fragment
07-03 21:46 20m - / -8 EB5AFK -16 / - 4 ✓ Closing fragment
06-28 01:46 20m - / -10 CE2SV -2 / - 2 ✓ Closing fragment
06-27 07:13 10m - / -6 UR5EPZ -14 / - 3 ✓ Closing fragment
06-27 07:11 10m - / +1 UA4FKT -19 / - 2 ✓ Closing fragment
06-22 16:58 20m - / - DL8TT -6 / - 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
012315 -13 2403  RI1FJZ OH5XH KP30 (x3)
200100  -9 2217  OI5AY OH5XH KP30
004500  -7 2303  OH6Z OH5XH KP30
004545 -14 1950  OH5XH OH6Z +03
004600  +3 2304  OH6Z OH5XH R-02
004615  -9 1950  OH5XH OH6Z RRR
004630  +6 2303  OH6Z OH5XH 73
004900  +1 2303  AG2K OH5XH KP30 (x3)
011030  -3 2300  K2PL OH5XH KP30 (x3)
40m 
UTC    dB Audio  Message
015130 -15 2410  OA4ENG OH5XH R-11 (x2)
015600 -14 2409  VO1IV OH5XH RRR
015900 -13 2410  IS0BOY OH5XH KP30
225615 -21 1194  OH5XH II6IALU -07
20m 
UTC    dB Audio  Message
221415 -17 1464  OH5XH CT1EEX 73
221915  -7  613  OH5XH EI7GSB +11 (x2)
100230 -10  703  OH5XH 4U1GSC +00 (x2)
052545 -19 1025  OH5XH RA3TVW R-02 (x2)
001315  -8  448  OH5XH KQ4RLN -08
233730  -9 2392  OH5XH KS1WK -24
233900  -1  834  OH5XH XQ1KK FH41 (x3)
021100 -11 2595  OH5XH KZ4NS -04 (x3)
10m 
UTC    dB Audio  Message
071100 -20 1991  OH5XH UA4FKT R+01 (x2)
071300 -16 1990  OH5XH UR5EPZ KN78 (x3)
182815 -19 2334  <...> OH5XH KP30

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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