F4HFS — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: France Most frequent locator attributed to this token: JN18

Receiver-side FT8 activity involving F4HFS, decoded by SO8OO in southeastern Poland. 149 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 5 UTC dates in the available aggregate history. Observed between 2026-06-16 and 2026-08-17.

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 149 FT8 messages attributed to F4HFS as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (99%), followed by 40 m (1%). Most decodes (95%) fell within the six-hour window 14:00-20:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (81%); the estimated median was -2 dB.

Overview

149
Messages attributed
5
UTC dates decoded
15
Active 15-min windows
-2 dB
Estimated median S/N

Bands

40m · 1 20m · 148
First attributed message: 2026-06-16
Last attributed message: 2026-08-17 19:11 UTC

Observed FT8 message patterns

Attributed sample
149 messages
Active dates
5 UTC dates
Estimated median S/N
-2 dB
Estimated 10th-90th percentile
-13 to +8 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 7, moderate (-15 to -9 dB) 22, strong (≥ -8 dB) 120.

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 F4HFS 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 F4HFS

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
JN18 · 87 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,370 km (approx.)
Last such locator decoded
2026-08-17 19:10 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 UTCBandF4HFS S/NCounterpartCounterpart S/NMsgsCapture
08-17 19:10 20m 0 / - JH5AVM - / -14 2 Partial capture
08-17 19:07 20m 0 / - JA2ODB - / - 2 Partial capture
08-17 19:01 20m -6 / - W0OVX - / - 10 Partial capture
08-17 18:56 20m -2 / - K0DTM - / - 3 Partial capture
08-17 18:47 20m -7 / - C91RU - / -21 11 ✓ Closing fragment
08-17 18:43 20m -4 / - 7Q7EB - / -8 8 ✓ Closing fragment
08-17 18:42 20m -2 / - OE7MAH - / -17 2 ✓ Closing fragment
08-17 18:40 20m -5 / - JM1EMX/QRP - / -13 3 Partial capture
08-17 18:36 20m +3 / - EA8DGI - / -15 4 ✓ Closing fragment
08-17 18:34 20m +4 / - JA1XZF - / -18 3 ✓ Closing fragment
08-17 18:31 20m -1 / - BH4ECL - / -12 3 ✓ Closing fragment
08-17 18:29 20m -1 / - W3EWL - / -16 3 Partial capture
08-17 18:28 20m +3 / - EA8DGI - / -18 3 Partial capture
08-17 18:26 20m +4 / - BG7BMG -17 / -5 5 ✓ Closing observed
08-17 18:23 20m +1 / - JH5AVM - / - 4 Partial capture
08-17 18:21 20m +4 / - JE1AEX - / -16 4 ✓ Closing fragment
08-17 18:19 20m +6 / 0 F4IIX +6 / -17 5 ✓ Full exchange observed
08-17 18:17 20m +4 / - JM1EMX/QRP - / -10 3 Partial capture
08-17 18:15 20m +6 / - S21VHF - / - 3 Partial capture
08-17 18:13 20m +6 / - KE8NQL - / -18 4 ✓ Closing fragment
08-17 18:11 20m +5 / - <...> - / -16 2 Partial capture
08-17 18:09 20m +9 / - ZS6BAF - / -15 4 ✓ Closing fragment
08-05 20:23 40m - / -8 US2YW +4 / - 3 ✓ Closing fragment
08-05 20:21 40m - / -6 DL7ARV -6 / - 3 ✓ Closing fragment
08-05 19:56 20m -15 / - BG3NQT - / -13 3 Partial capture
08-05 19:54 20m -12 / - VY2SH - / - 3 Partial capture
08-05 19:49 20m -5 / - JF1USM - / - 4 Partial capture
08-05 19:46 20m -6 / - JE7KJG - / -18 2 Partial capture
08-05 19:43 20m -16 / - JA7QOA - / -21 3 ✓ Closing fragment
08-05 19:37 20m -4 / - JA1PSS - / -14 4 ✓ Closing fragment
06-30 18:50 20m +4 / - KF0YOB - / - 8 Partial capture

Recent FT8 messages decoded at SO8OO

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

20m 
UTC    dB Audio  Message
185700  -1 1507  K0DTM F4HFS JN18
190130  -9 1723  W0OVX F4HFS JN18 (x10)
190745  -1 1975  JA2ODB F4HFS JN18 (x2)
191030  +0 1975  JH5AVM F4HFS JN18 (x2)
40m 
UTC    dB Audio  Message
202115  -9 2341  F4HFS DL7ARV JO62 (x3)
202315  +8 2342  F4HFS US2YW KN28 (x3)
202545 -22 1532  F4HFS PD0LBY R-03
202915 -18 2341  BI1HJR F4HFS JN18

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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