SM7HZK — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Sweden Most frequent locator attributed to this token: JO76

Receiver-side FT8 activity involving SM7HZK, decoded by SO8OO in southeastern Poland. 1,039 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 52 UTC dates in the available aggregate history. Observed between 2026-06-14 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 1,039 FT8 messages attributed to SM7HZK as the transmitting token by decoded message structure across 52 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (50%), followed by 20 m (30%) and 80 m (17%). The busiest six-hour window was 21:00-03:00 UTC, containing 44% of decodes. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -7.9 dB.

Overview

1,039
Messages attributed
52
UTC dates decoded
173
Active 15-min windows
-7.9 dB
Estimated median S/N

Bands

80m · 180 40m · 517 20m · 310 10m · 32
First attributed message: 2026-06-14
Last attributed message: 2026-09-20 12:15 UTC

Observed FT8 message patterns

Attributed sample
1,039 messages
Active dates
52 UTC dates
Estimated median S/N
-7.9 dB
Estimated 10th-90th percentile
-16 to +4 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 113, moderate (-15 to -9 dB) 365, strong (≥ -8 dB) 561.

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 SM7HZK 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 SM7HZK

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
JO76 · 799 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
858 km (approx.)
Last such locator decoded
2026-09-20 12:15 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 UTCBandSM7HZK S/NCounterpartCounterpart S/NMsgsCapture
09-20 12:15 40m -9 / - MM7WQD - / - 2 Partial capture
09-20 12:08 40m - / 0 YL2TM -16 / - 4 ✓ Closing fragment
09-20 12:06 40m -12 / -7 PD0MDX -17 / +5 4 ✓ Full exchange observed
09-20 09:08 40m - / +4 SQ3BKI +2 / - 2 ✓ Closing fragment
09-20 09:05 40m - / -3 9A3MRN -9 / - 2 ✓ Closing fragment
09-20 08:58 40m -12 / - MM7WQD - / -9 3 Partial capture
09-20 08:48 40m -7 / - OS5U - / -25 4 ✓ Closing fragment
09-20 08:37 40m -9 / - GM4ZTO/QRP - / - 2 Partial capture
09-20 08:34 40m -6 / - M9LDX - / - 2 ✓ Closing fragment
09-20 08:26 40m -8 / - SQ3EWA -18 / -15 3 ✓ Closing observed
09-20 06:56 40m +1 / - WA4FU - / - 9 Partial capture
09-20 06:47 40m -7 / - PA0IOT/P - / - 3 Partial capture
09-19 22:53 80m +6 / - SV3CEZ - / - 3 Partial capture
09-19 15:35 40m -6 / -9 RA5AK -16 / -10 2 Partial capture
09-19 15:34 40m -6 / -9 ON1DGN -14 / - 2 ✓ Closing observed
09-19 06:56 40m -1 / - G0GTV - / -11 3 ✓ Closing fragment
09-19 06:38 40m +1 / - EI2KZB - / -12 5 ✓ Closing fragment
09-19 06:34 40m +2 / - EI2KZB - / - 2 Partial capture
09-19 06:22 40m 0 / - OZ6CM - / - 7 Partial capture
09-18 07:41 40m -8 / -11 SQ9SET -1 / -1 6 ✓ Full exchange observed
09-18 07:39 40m -1 / - MW7GQB - / -3 4 ✓ Closing fragment
09-18 07:38 40m -2 / - DF0NN - / - 2 Partial capture
09-18 07:28 40m -11 / -10 G0JEI -12 / - 2 ✓ Closing observed
09-18 07:28 40m -9 / -5 OK3MB -8 / -13 6 ✓ Full exchange observed
09-18 07:27 40m -7 / - ON8WR - / -18 2 ✓ Closing fragment
09-18 07:19 40m -10 / - SA3SHN - / - 9 Partial capture
09-18 06:07 40m +2 / - DM0CRACY - / - 7 Partial capture
09-18 06:05 40m +3 / - EH3ST - / -11 3 Partial capture
09-18 05:56 40m -4 / -9 LA3BO +7 / -13 9 ✓ Full exchange observed
09-18 05:49 40m -4 / - W1AW/1 - / +8 2 Partial capture
09-18 05:49 40m - / - DG3AWF -12 / - 3 Partial capture
09-17 22:42 80m +8 / -1 OZ1KZX +6 / +9 4 ✓ Full exchange observed
09-17 22:39 80m +8 / -16 KP4AA -20 / - 19 Partial capture
09-17 22:21 40m -8 / - LZ936BA - / - 2 Partial capture
09-16 15:38 40m -2 / - PA0MUS - / - 8 Partial capture
09-16 15:30 40m -2 / - OM5ALL - / - 6 Partial capture
09-16 15:24 40m +2 / -4 PA1JH -16 / - 6 ✓ Full exchange observed
09-16 15:20 40m +2 / - SP5VJL - / - 8 Partial capture
09-16 15:18 40m +1 / +9 HB9ELE +4 / +1 7 ✓ Full exchange observed
09-16 15:16 40m 0 / 0 SQ9SET -8 / +2 5 ✓ Full exchange observed
09-16 15:11 40m -6 / - R6HV/P - / - 2 Partial capture
09-16 06:12 40m -2 / +4 YL3ARH -16 / - 2 Partial capture
09-16 06:10 40m -8 / - DL2KBX - / - 4 Partial capture
09-16 06:08 40m -8 / - OM8YZ - / - 4 Partial capture
09-16 06:01 40m -6 / +2 MI7XHT -22 / -4 4 ✓ Full exchange observed
09-16 05:59 40m -14 / - K3RJB/P - / -2 2 Partial capture
09-16 05:49 80m -9 / - VP2MAA - / - 9 Partial capture
09-15 08:00 40m - / - YO3GNF -3 / - 2 Partial capture
09-15 06:10 40m +2 / - GM6URC - / -7 3 ✓ Closing fragment
09-14 05:42 80m -12 / -10 SP8WB +18 / - 3 ✓ Closing observed

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
090530  -6 1913  SM7HZK 9A3MRN RR73
090800  +5 1102  SM7HZK SQ3BKI +04 (x2)
091530 -19 2458  DA2DA SM7HZK JO76
120645 -18 1189  SM7HZK PD0MDX -07
120700 -12 2530  PD0MDX SM7HZK R+05
120715 -16 1189  SM7HZK PD0MDX RR73 (x2)
120815 -14 1756  SM7HZK YL2TM +00 (x2)
120900 -13 2530  PD0REB SM7HZK 73
120915 -15 1756  SM7HZK YL2TM +00 (x2)
121515  -8 2530  MM7WQD SM7HZK JO76 (x2)
80m 
UTC    dB Audio  Message
224415  +5 2740  KP4AA SM7HZK JO76 (x9)
224830 -20 1154  SM7HZK KP4AA -16
224845  +7 2740  KP4AA SM7HZK JO76 (x2)
225300  +5 2688  SV3CEZ SM7HZK JO76 (x3)
20m 
UTC    dB Audio  Message
083015 -11 2651  OM6AI SM7HZK JO76
083515  -9 2651  GW4ONI SM7HZK JO76
102230 +11 1099  SM7HZK OR5T -06 (x2)
222115 -10 2400  SM7HZK OK2CNI -04 (x2)
070915 -16 1978  SM7HZK EG1PPE RR73
160130  +1 2778  <...> SM7HZK JO76 (x4)
160345  -3 1689  SM7HZK <...> -09
160415  -1 1673  SM7HZK IT9SVJ JM68 (x3)
10m 
UTC    dB Audio  Message
100230  -7 2604  SM7HZK RY6O KN87 (x4)
145115 -19 2363  MW3FLI SM7HZK JO76
084430  -5  997  SM7HZK IK4IDF JN54 (x3)
085045  -9  961  SM7HZK F5ADE -02 (x2)
101445 -15 2365  <...> SM7HZK JO76
101915  +2 2733  SM7HZK F1PBZ -15 (x3)
101445  -8  499  SM7HZK SV9/PD9VOG -05

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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