HB9SLT — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Switzerland Most frequent locator attributed to this token: JN36

Receiver-side FT8 activity involving HB9SLT, decoded by SO8OO in southeastern Poland. 32 FT8 messages attributed to this token as transmitter, on 60m, 40m, 10m, across 10 UTC dates in the available aggregate history. Observed between 2026-06-21 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 32 FT8 messages attributed to HB9SLT as the transmitting token by decoded message structure across 10 UTC dates in the available aggregate history. The largest monitored-band total was 10 m (78%), followed by 40 m (13%) and 60 m (9%). Several six-hour UTC windows tied for the largest share (75%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (78%); the estimated median was -19 dB.

Overview

32
Messages attributed
10
UTC dates decoded
12
Active 15-min windows
-19 dB
Estimated median S/N

Bands

60m · 3 40m · 4 10m · 25
First attributed message: 2026-06-21
Last attributed message: 2026-09-20 14:22 UTC

Observed FT8 message patterns

Attributed sample
32 messages
Active dates
10 UTC dates
Estimated median S/N
-19 dB
Estimated 10th-90th percentile
-23 to -15 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 25, moderate (-15 to -9 dB) 7, strong (≥ -8 dB) 0.

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 HB9SLT 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 HB9SLT

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
JN36 · 17 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,158 km (approx.)
Last such locator decoded
2026-09-20 14:22 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 UTCBandHB9SLT S/NCounterpartCounterpart S/NMsgsCapture
09-20 14:15 40m - / -11 DF0PDF 0 / - 2 Partial capture
09-18 09:24 40m - / 0 OK3MB -8 / - 4 ✓ Closing fragment
09-18 08:46 40m - / -12 PD0ME -7 / - 2 ✓ Closing fragment
09-15 17:24 60m - / -10 SM6XVI -11 / - 3 ✓ Closing fragment
09-15 17:16 60m - / -8 IK0BAL -7 / - 2 ✓ Closing fragment
09-15 17:13 60m - / 0 IZ0MIT +2 / - 2 ✓ Closing fragment
09-15 17:11 60m - / - DL5NON -12 / - 2 ✓ Closing fragment
09-15 17:10 60m - / -10 DL6FBR -8 / - 2 ✓ Closing fragment
09-15 17:08 60m - / -16 YO4NT -4 / - 2 ✓ Closing fragment
09-15 17:06 60m - / -9 DJ1PQ -16 / - 3 ✓ Closing fragment
09-15 17:05 60m - / -9 DG9NAY -1 / - 6 ✓ Closing fragment
09-15 09:33 40m - / -2 9A7BB -11 / - 5 ✓ Closing fragment
09-15 09:25 40m - / - DH3KR -18 / - 2 ✓ Closing fragment
09-15 09:25 40m - / +4 HB9IRO -15 / - 3 ✓ Closing fragment
09-15 09:24 40m - / - OM8AMF -10 / - 2 Partial capture
08-15 14:54 40m - / - UT2PC -4 / - 2 Partial capture
08-15 14:45 40m - / -11 SP9UPH -10 / - 3 ✓ Closing fragment
08-11 16:40 40m - / -2 9A5E -8 / - 2 ✓ Closing fragment
08-11 15:42 40m - / - DL0HAM -6 / - 4 ✓ Closing fragment
08-01 19:26 60m -15 / - DL9YNG - / -3 2 ✓ Closing fragment
07-25 18:31 40m - / -19 SP7TF -17 / - 2 ✓ Closing fragment
07-19 10:07 10m -18 / - UR5WCA - / - 2 Partial capture
07-14 09:36 10m -20 / - 7Q5MP - / - 2 ✓ Closing fragment
07-14 09:24 10m -15 / - IW8PQ -21 / - 3 ✓ Closing observed
07-03 16:43 40m - / -3 DL3MIB -8 / - 3 ✓ Closing fragment
07-02 15:58 40m - / - DL9KM -14 / - 2 ✓ Closing fragment
06-26 08:53 10m -16 / - UT7UJ - / -9 2 ✓ Closing fragment
06-26 08:52 10m -15 / +1 HA3TNJ +1 / +5 6 ✓ 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
093600 -11  844  HB9SLT 9A7BB 73
081600  -9 2384  HB9SLT SP100PKP -03
084000  -9 1055  HB9SLT OK3MB JO70
084645  -7 1876  HB9SLT PD0ME -12 (x2)
091200 -20 1678  F6FHZ HB9SLT -16
092400 -10 1055  HB9SLT OK3MB JO70 (x4)
092945 -15 1628  EA3IZF HB9SLT -04
141545  -2 2397  HB9SLT DF0PDF -11 (x2)
141930 -23 1797  MM8FKF HB9SLT JN36
142230 -24 1797  LX1RFJ HB9SLT JN36
10m 
UTC    dB Audio  Message
081915 -24 1812  CQ HB9SLT JN36 (x2)
082115 -24 1812  DO2PY HB9SLT -07
082315 -20 1430  F4NLW/P HB9SLT -10
092430 -11 1430  IW8PQ HB9SLT JN36
092545 -21 2228  HB9SLT IW8PQ +22
092630 -19 1429  IW8PQ HB9SLT 73
093615 -23 1429  7Q5MP HB9SLT JN36 (x2)
100745 -18 1431  UR5WCA HB9SLT JN36 (x2)
101130 -19 1430  EC5M HB9SLT R+03
101415 -19 1430  <...> HB9SLT JN36
082645 -21 1750  HB9SLT LZ3AN RR73
093845 -20 1435  CQ HB9SLT JN36
60m 
UTC    dB Audio  Message
170745  -2 1813  HB9SLT DG9NAY R-09 (x2)
170845  -7 1534  HB9SLT YO4NT -16 (x2)
171045 -10  769  HB9SLT DL6FBR R-10 (x2)
171145 -13 1649  HB9SLT DL5NON JO63 (x2)
171345  +1  681  HB9SLT IZ0MIT +00 (x2)
171630  -8 1962  HB9SLT IK0BAL -08 (x2)
172415 -10  983  HB9SLT SM6XVI JO66 (x3)

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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