YO8CHF — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Romania Most frequent locator attributed to this token: KN37

Receiver-side FT8 activity involving YO8CHF, decoded by SO8OO in southeastern Poland. 80 FT8 messages attributed to this token as transmitter, on 20m, across 4 UTC dates in the available aggregate history. Observed between 2026-06-18 and 2026-07-22.

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 80 FT8 messages attributed to YO8CHF as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). Several six-hour UTC windows tied for the largest share (91%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -12 dB.

Overview

80
Messages attributed
4
UTC dates decoded
15
Active 15-min windows
-12 dB
Estimated median S/N

Bands

20m · 80
First attributed message: 2026-06-18
Last attributed message: 2026-07-22 12:39 UTC

Observed FT8 message patterns

Attributed sample
80 messages
Active dates
4 UTC dates
Estimated median S/N
-12 dB
Estimated 10th-90th percentile
-18 to -5 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 16, moderate (-15 to -9 dB) 39, strong (≥ -8 dB) 25.

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 YO8CHF 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 YO8CHF

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
KN37 · 64 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
468 km (approx.)
Last such locator decoded
2026-07-22 12:39 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 UTCBandYO8CHF S/NCounterpartCounterpart S/NMsgsCapture
08-30 15:53 20m - / -14 JA3KGF +5 / - 2 Partial capture
08-30 15:29 20m - / -10 3A2MW -10 / - 2 ✓ Closing fragment
08-30 12:21 20m - / -13 UB4HVA -16 / - 3 ✓ Closing fragment
08-30 12:00 20m - / -17 Z31PM -18 / - 2 Partial capture
08-30 11:46 20m - / - IU1PFA -15 / - 4 Partial capture
08-30 11:39 20m - / -11 PD3LKN -10 / - 2 ✓ Closing fragment
07-22 12:34 20m -9 / - N4RJ - / - 6 Partial capture
07-22 12:29 20m -4 / - <...> - / -10 2 Partial capture
07-22 12:26 20m -9 / - SN4K - / - 3 Partial capture
07-22 12:22 20m -7 / - 9A2GU - / - 3 Partial capture
07-22 12:16 20m -5 / - OH1NHX - / - 5 Partial capture
07-22 12:13 20m -8 / - YO6PPX - / -9 4 Partial capture
07-22 12:11 20m -6 / - SP9UPH - / - 4 Partial capture
07-22 12:06 20m -8 / - CR7BRV - / - 2 Partial capture
07-22 12:03 20m -14 / - YO3IZI - / - 2 Partial capture
07-22 11:56 20m -12 / - SQ9DJQ - / -9 2 Partial capture
07-22 11:51 20m -12 / - LY1MG - / - 2 Partial capture
07-22 11:46 20m -16 / -14 SP1ZMO -17 / -12 3 Partial capture
07-22 11:26 20m - / - DG5PW -20 / - 3 ✓ Closing fragment
07-22 11:12 20m -18 / - OH0KCE - / - 6 Partial capture
07-08 06:59 20m - / -4 OE6HTG -12 / - 2 Partial capture
07-08 06:53 20m - / -8 OK8RM -12 / - 2 Partial capture
07-05 11:59 20m -14 / - DF3IS - / - 2 Partial capture
07-05 11:32 20m -12 / - S56IPS - / - 2 Partial capture
07-05 09:42 20m - / - DL6ZFG -12 / - 3 ✓ Closing fragment
07-05 08:42 20m - / -20 9A2LM -24 / - 2 Partial capture
07-05 08:28 20m - / +7 SV2HTW -4 / - 3 ✓ Closing fragment
06-24 10:07 20m - / -11 IK4LZH +13 / - 4 Partial capture
06-24 10:00 20m - / - UB3YCK -18 / - 3 Partial capture

Recent FT8 messages decoded at SO8OO

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

20m 
UTC    dB Audio  Message
114930 -13 2271  YO8CHF IU1PFA JN44
115330  -8 2350  YO8CHF PD9FLX JO22
120045 -18 2450  YO8CHF Z31PM -17 (x2)
120745 -12 1567  YO8CHF DA1MHH R-11
121915  -8 2056  YO8CHF OH1LA KP01
122115 -16 1714  YO8CHF UB4HVA LO53 (x3)
125015  -6 3016  YO8CHF OZ1SMB JO54
131145 -10 2351  YO8CHF UB4CJS -11
152945 -10 1213  YO8CHF 3A2MW -10 (x2)
155315  +7  326  YO8CHF JA3KGF -14 (x2)

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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