HB9DAU — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Switzerland Most frequent locator attributed to this token: JN47

Receiver-side FT8 activity involving HB9DAU, decoded by SO8OO in southeastern Poland. 572 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 39 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-10-04.

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 572 FT8 messages attributed to HB9DAU as the transmitting token by decoded message structure across 39 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (62%), followed by 20 m (21%) and 10 m (17%). The busiest six-hour window was 18:00-00:00 UTC, containing 43% of decodes. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -14 dB.

Overview

572
Messages attributed
39
UTC dates decoded
108
Active 15-min windows
-14 dB
Estimated median S/N

Bands

40m · 354 20m · 122 10m · 96
First attributed message: 2026-06-06
Last attributed message: 2026-10-04 21:13 UTC

Observed FT8 message patterns

Attributed sample
572 messages
Active dates
39 UTC dates
Estimated median S/N
-14 dB
Estimated 10th-90th percentile
-21 to -6.1 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 230, moderate (-15 to -9 dB) 243, strong (≥ -8 dB) 99.

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 HB9DAU 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 HB9DAU

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
JN47 · 450 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
975 km (approx.)
Last such locator decoded
2026-10-04 21:10 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 UTCBandHB9DAU S/NCounterpartCounterpart S/NMsgsCapture
10-04 21:12 40m -9 / -3 EA6TU -13 / - 3 ✓ Closing observed
10-04 21:07 40m -16 / - 4L7T - / - 5 Partial capture
10-04 21:03 40m -11 / - 4L7T - / -8 4 Partial capture
10-04 20:58 40m -11 / - VJ6X - / - 3 Partial capture
10-04 20:55 40m - / -11 PA8S -3 / - 13 Partial capture
10-04 20:47 40m -13 / - JR3NZC - / - 2 Partial capture
10-04 20:46 40m -15 / - HS0ZOY - / - 3 Partial capture
10-04 20:38 40m -16 / -18 EX7CQ -14 / +2 5 Partial capture
09-29 18:06 40m -6 / - F6BHK -6 / +6 4 ✓ Closing observed
09-29 18:05 40m -10 / -3 DM4ZPJ -2 / -4 6 Partial capture
09-18 22:29 40m - / -18 CT1BFP -11 / - 3 Partial capture
09-01 22:41 40m -18 / - II7MGLE - / - 2 Partial capture
09-01 22:32 40m -13 / - BG7BVP - / - 5 Partial capture
09-01 22:30 40m -8 / -8 YB5QZ -7 / - 3 ✓ Closing observed
09-01 22:29 40m - / - RL3K -4 / - 3 Partial capture
09-01 22:27 40m -12 / -8 RX3ASQ -2 / 0 7 ✓ Full exchange observed
09-01 22:27 40m - / - UR9QQ -4 / - 4 Partial capture
09-01 22:26 40m - / - G1CEC -14 / - 7 Partial capture
08-30 06:36 20m - / -16 JY5IB -20 / - 2 ✓ Closing fragment
08-30 06:31 20m - / -17 YO6BLM 0 / - 3 ✓ Closing fragment
08-30 06:11 40m -16 / - LX7I - / - 16 Partial capture
08-29 22:37 40m -8 / - RK9UE - / -6 3 ✓ Closing fragment
08-29 22:27 40m -11 / - 8Q7PR - / - 14 Partial capture
08-29 22:25 40m -13 / - MD0CCE - / - 6 Partial capture
08-29 22:17 40m -9 / - MD0CCE - / - 2 Partial capture
08-29 22:15 40m -13 / - 8Q7PR - / - 14 Partial capture
08-28 06:53 20m - / -4 PD8RUK -8 / - 3 ✓ Closing fragment
08-28 06:53 20m -6 / - MI7RDK - / -14 2 Partial capture
08-28 06:49 20m - / -12 F4BYA +4 / - 4 ✓ Closing fragment
08-27 05:45 20m - / -14 LA1SNA -8 / - 3 ✓ Closing fragment
08-27 05:20 40m -10 / - ZL1OGX - / - 3 Partial capture
08-27 05:14 40m - / -1 PG5FRL -12 / - 4 Partial capture
08-27 05:12 40m -6 / -8 F8MRQ -13 / -16 6 ✓ Full exchange observed
08-27 05:10 40m -10 / - G0GTV - / -10 2 Partial capture
08-27 05:09 40m -10 / - EA3CFV - / -8 2 Partial capture
08-26 21:49 40m -5 / -13 CT3MD -5 / -7 9 Partial capture
08-26 21:45 40m -4 / - D2ACE - / - 10 Partial capture
08-26 21:43 40m -7 / +1 DJ0MAB -3 / - 4 ✓ Closing observed
08-26 21:23 20m -5 / -6 R7OV -15 / - 4 ✓ Closing observed
08-25 22:08 40m - / -14 EA8UP -13 / - 3 Partial capture
08-25 22:03 40m -15 / -14 UA4FKT -2 / +2 5 ✓ Full exchange observed
08-25 22:02 40m -10 / -2 G0ANS -4 / +6 4 ✓ Full exchange observed
08-25 21:57 40m -15 / - SV1EKI -8 / +3 4 ✓ Closing observed
08-25 21:56 40m -15 / - EA4DM - / -10 2 ✓ Closing fragment
08-25 03:32 40m -17 / - OA4CLU - / - 3 Partial capture
08-25 03:29 40m -18 / - PV8AJ - / - 2 Partial capture
08-25 02:50 40m -9 / - HI8R - / - 9 Partial capture
08-25 02:48 40m -7 / -18 4X5MZ 0 / +6 4 ✓ Full exchange observed
08-25 02:45 40m -3 / - EA8CDG - / - 5 Partial capture
08-25 02:40 40m -6 / -13 4Z5NZ -8 / -5 10 ✓ Full exchange observed

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
210115  -5  687  HB9DAU PA8S R-11 (x2)
210230 -15 1125  VJ6X HB9DAU JN47
210300 -13 1125  4L7T HB9DAU JN47 (x9)
211215 -15 1134  HB9DAU EA6TU -03 (x2)
211300  -9 1159  EA6TU HB9DAU 73
20m 
UTC    dB Audio  Message
064945  +8 2715  HB9DAU F4BYA JN19 (x3)
065230  -3 1183  CQ HB9DAU JN47
065245  -2 1190  HB9DAU DL6UM JO60
065300  -7 1183  MI7RDK HB9DAU -14
065315  -6 1359  HB9DAU PD8RUK JO32 (x3)
065500  -5 1183  MI7RDK HB9DAU -14
063130  -6 1050  HB9DAU YO6BLM KN25 (x3)
063645 -20 1746  HB9DAU JY5IB -16 (x2)
10m 
UTC    dB Audio  Message
100730 -19 1344  CT2KNA HB9DAU JN47
100830 -20 1343  IT9JXH HB9DAU JN47
101300 -22 1387  CT2KNA HB9DAU JN47
101330 -22 1387  4Z5ML HB9DAU JN47 (x2)
101645 -21 1265  DN9LM HB9DAU -13
101915 -20 1266  CQ HB9DAU JN47
133500 -13 1097  HB9DAU DN9SHA JO31
133530 -17 1689  HB9DAU PD2NBE -19
133530  -8 1097  HB9DAU DN9SHA R-05
133600 -18 1689  HB9DAU PD2NBE -19 (x3)
104230  -9 1138  HB9DAU M0BEW -05 (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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