SM7SLU — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Sweden Most frequent locator attributed to this token: JO65

Receiver-side FT8 activity involving SM7SLU, decoded by SO8OO in southeastern Poland. 63 FT8 messages attributed to this token as transmitter, on 40m, across 4 UTC dates in the available aggregate history. Observed between 2026-09-07 and 2026-09-12.

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 63 FT8 messages attributed to SM7SLU as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (100%). Several six-hour UTC windows tied for the largest share (89%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (67%); the estimated median was -5 dB.

Overview

63
Messages attributed
4
UTC dates decoded
8
Active 15-min windows
-5 dB
Estimated median S/N

Bands

40m · 63
First attributed message: 2026-09-07
Last attributed message: 2026-09-12 21:14 UTC

Observed FT8 message patterns

Attributed sample
63 messages
Active dates
4 UTC dates
Estimated median S/N
-5 dB
Estimated 10th-90th percentile
-17 to +3 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 8, moderate (-15 to -9 dB) 13, strong (≥ -8 dB) 42.

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 SM7SLU 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 SM7SLU

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
JO65 · 29 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
855 km (approx.)
Last such locator decoded
2026-09-12 21:14 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 UTCBandSM7SLU S/NCounterpartCounterpart S/NMsgsCapture
09-12 21:13 40m -2 / - OK2VCR - / - 2 ✓ Closing fragment
09-12 21:12 40m -2 / -8 UR9QQ -10 / +8 4 ✓ Full exchange observed
09-12 21:09 40m +4 / - OM3PR - / +6 2 ✓ Closing fragment
09-12 21:09 40m - / - R6LPF -10 / - 2 Partial capture
09-12 21:07 40m +2 / - EB3JT - / +6 2 ✓ Closing fragment
09-12 21:05 40m -4 / -15 YO4NF +4 / +10 6 ✓ Full exchange observed
09-12 21:03 40m -6 / -3 IN3LHF -15 / +3 3 ✓ Full exchange observed
09-12 21:01 40m -3 / +7 DL1SRS -6 / - 5 ✓ Full exchange observed
09-12 20:59 40m -2 / -15 HA7TM -22 / - 3 ✓ Full exchange observed
09-12 20:57 40m -6 / - DH1HF - / 0 2 ✓ Closing fragment
09-12 20:57 40m - / - G4MHJ -9 / - 3 Partial capture
09-12 20:52 40m +1 / - YU4OCC - / - 7 Partial capture
09-12 20:50 40m 0 / - EW2ZC - / +9 3 ✓ Closing fragment
09-11 09:38 40m - / - DL3MIB -6 / - 7 Partial capture
09-11 09:36 40m - / -8 UT4PA -5 / - 3 ✓ Closing fragment
09-11 09:30 40m - / - DG6TOM -20 / - 2 Partial capture
09-11 09:28 40m - / - F5RRS -8 / - 4 Partial capture
09-11 09:26 40m - / -7 SP6FME -9 / - 2 Partial capture
09-10 21:05 40m -16 / -13 SY1BKQ -4 / - 15 Partial capture
09-10 20:55 40m - / -1 ON1BH -6 / - 4 Partial capture
09-10 20:52 40m -13 / - 9A5MP - / -3 3 Partial capture
09-10 20:52 40m - / - RL3K 0 / - 2 Partial capture
09-10 20:51 40m - / - YO3GNF +6 / - 2 Partial capture
09-10 20:51 40m -12 / - US2YW - / - 2 ✓ Closing fragment
09-10 20:48 40m -14 / - LZ1ZF -23 / +4 4 ✓ Closing observed
09-10 20:45 40m -12 / - E75C - / - 2 Partial capture
09-10 20:45 40m - / - DJ0MAB -3 / - 2 Partial capture
09-10 20:43 40m -20 / -14 YO7CWP -3 / 0 7 ✓ Full exchange observed
09-07 15:13 40m - / +8 DK7ZT -10 / - 2 Partial capture
09-07 14:53 40m -8 / +2 PG5FRL -13 / -11 8 ✓ Full exchange observed
09-07 14:51 40m - / -2 PD0LBY -20 / - 4 Partial capture
09-07 12:36 40m -22 / - R1943OD - / - 2 Partial capture
09-07 10:02 40m - / -16 EM70WWW -20 / - 6 Partial capture
09-07 09:53 40m - / - SP5ALV -4 / - 2 Partial capture

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
210915  +4 1597  CQ SM7SLU JO65
210930 -10 2366  SM7SLU R6LPF KN97
210945  +2 1597  OM3PR SM7SLU +06 (x2)
211030 -10 2366  SM7SLU R6LPF KN97
211115  +8 1597  CT2HEX SM7SLU +04
211200 -11 1339  SM7SLU UR9QQ KN77
211215  -6 1597  UR9QQ SM7SLU +08
211230 -10 1339  SM7SLU UR9QQ R-08
211245  +2 1597  UR9QQ SM7SLU RR73
211315  -1 1597  OK2VCR SM7SLU +11 (x2)
211415  -4 1597  CQ SM7SLU JO65 (x2)
211500 -12 2391  SM7SLU R2DX KO86

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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