SK0HB — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Sweden Most frequent locator attributed to this token: JO89

Receiver-side FT8 activity involving SK0HB, decoded by SO8OO in southeastern Poland. 125 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 2 UTC dates in the available aggregate history. Observed between 2026-07-21 and 2026-09-15.

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 125 FT8 messages attributed to SK0HB as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (56%), followed by 40 m (41%) and 20 m (3%). In this small sample, the estimated median decoder S/N was -11 dB; no usual signal pattern is inferred.

Overview

125
Messages attributed
2
UTC dates decoded
12
Active 15-min windows
-11 dB
Estimated median S/N

Bands

First attributed message: 2026-07-21
Last attributed message: 2026-09-15 18:54 UTC

Observed FT8 message patterns

Attributed sample
125 messages
Active dates
2 UTC dates
Estimated median S/N
-11 dB
Estimated 10th-90th percentile
-18 to -3 dB
Recurring-pattern threshold
Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 26, moderate (-15 to -9 dB) 64, strong (≥ -8 dB) 35.

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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).

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 SK0HB

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
JO89 · 34 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,106 km (approx.)
Last such locator decoded
2026-09-15 18:53 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 UTCBandSK0HB S/NCounterpartCounterpart S/NMsgsCapture
09-15 18:56 80m - / -12 DO2BBC 0 / - 3 ✓ Closing fragment
09-15 18:56 80m - / -2 DK7TX -3 / - 2 ✓ Closing fragment
09-15 18:53 80m -10 / -12 UT7NY +8 / +8 4 ✓ Full exchange observed
09-15 18:38 80m - / -11 DL8TV +7 / - 4 ✓ Closing fragment
09-15 18:34 80m -6 / - MM0HVU - / 0 5 Partial capture
09-15 18:32 80m -8 / -16 SP9AMH +9 / +3 4 ✓ Full exchange observed
09-15 18:31 80m - / - RC2Y +2 / - 2 Partial capture
09-15 18:30 80m -15 / 0 DO2RG -4 / - 5 ✓ Closing observed
09-15 18:24 80m -13 / -5 SP9HWD -5 / -16 5 ✓ Full exchange observed
09-15 18:20 80m -7 / - OE2AGZ - / -17 3 Partial capture
09-15 18:15 80m -13 / - OE2AGZ -17 / -17 8 Partial capture
09-15 18:14 80m -12 / +7 SP5DFK -3 / -1 5 ✓ Full exchange observed
09-15 18:08 80m -10 / -2 DL9KM -12 / -11 4 ✓ Full exchange observed
09-15 18:06 80m -8 / -7 DO9SAM +4 / +3 5 ✓ Full exchange observed
09-15 18:04 80m -2 / - YL3GQ 0 / - 3 ✓ Closing observed
09-15 18:01 80m -8 / +7 SP7IIX +16 / - 4 ✓ Full exchange observed
09-15 18:00 80m -4 / - DO2KMB - / +7 2 ✓ Closing fragment
09-15 17:57 80m -9 / 0 DA6IT -7 / +5 5 ✓ Full exchange observed
09-15 17:53 80m -6 / - SM5FQQ -3 / - 4 ✓ Closing observed
09-15 17:53 80m -10 / -9 9A3J +8 / +2 10 ✓ Full exchange observed
09-15 17:52 80m -8 / - RD7O - / +3 2 ✓ Closing fragment
09-15 17:50 80m -7 / -22 RC6OU +7 / +2 8 ✓ Full exchange observed
09-15 17:50 80m -9 / -12 RW1AI -12 / - 4 ✓ Full exchange observed
09-15 17:50 80m - / - DL8TV +6 / - 7 Partial capture
09-15 17:49 80m -12 / -2 OZ1EDR -4 / +6 4 ✓ Full exchange observed
09-15 17:46 80m -17 / - DK7ZT - / +7 2 ✓ Closing fragment
09-15 17:40 80m -6 / -22 R7DX +12 / - 9 ✓ Full exchange observed
09-15 17:39 80m -17 / - LY1DY +7 / - 2 Partial capture
09-15 17:17 40m - / - ON5RZ 0 / - 3 Partial capture
09-15 17:15 40m - / +7 OM7RU +4 / - 4 ✓ Closing fragment
09-15 17:10 40m -12 / -2 DF5DY +6 / - 7 ✓ Closing observed
09-15 17:09 40m -15 / - ON1DGN -13 / -4 3 ✓ Closing observed
09-15 17:06 40m -14 / - ON7AN -14 / +9 3 ✓ Closing observed
09-15 17:03 40m -12 / -12 UT0IN -3 / +9 5 ✓ Full exchange observed
09-15 17:02 40m -20 / +1 SP6LHT 0 / -5 5 ✓ Full exchange observed
09-15 17:00 40m -15 / -1 PA7ZZ +2 / +1 5 ✓ Full exchange observed
09-15 16:59 40m -10 / - OH6DHM - / +3 2 ✓ Closing fragment
09-15 16:56 40m -14 / -2 RZ1AS -9 / - 6 ✓ Full exchange observed
09-15 16:56 40m -12 / - OK2PKT - / -6 2 ✓ Closing fragment
09-15 16:48 40m - / - UT0IN +2 / - 2 Partial capture
09-15 16:47 40m -16 / -12 LZ3SD +2 / -19 5 ✓ Full exchange observed
09-15 16:47 40m -17 / -11 UD8D -2 / - 4 ✓ Full exchange observed
09-15 16:44 40m - / -2 ER1CW -4 / - 3 ✓ Closing fragment
09-15 16:44 40m -16 / -11 SY1BKQ +2 / -13 6 ✓ Full exchange observed
09-15 16:42 40m -16 / -21 HF5A -7 / -12 4 ✓ Full exchange observed
09-15 16:40 40m - / -7 UB3ZKO -1 / - 3 ✓ Closing fragment
09-15 16:37 40m -17 / - UN7PPV - / -6 3 Partial capture
09-15 16:36 40m -17 / -8 UA3FO -6 / - 4 ✓ Closing observed
09-15 16:33 40m -16 / - R8LCA - / -12 2 ✓ Closing fragment
09-15 16:30 40m -10 / - OH5KNL -1 / - 3 ✓ Closing observed

Recent FT8 messages decoded at SO8OO

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

80m
UTC    dB Audio  Message
183845 +14 2246  SK0HB DL8TV JN49 (x4)
185300  -1 1713  CQ SK0HB JO89 (x2)
185345  +5  596  SK0HB UT7NY KN49
185400 -10 1713  UT7NY SK0HB +08
185415  +6  596  SK0HB UT7NY R-12 (x2)
185615  -6 2243  SK0HB DK7TX R-02
185645  -4 1262  SK0HB DO2BBC JO41
185645  +0 2243  SK0HB DK7TX 73
185715  +1 1262  SK0HB DO2BBC R-12 (x2)
40m
UTC    dB Audio  Message
171000 -13 1726  CQ SK0HB JO89
171045  +7  577  SK0HB DF5DY JO41 (x5)
171300 -12 1726  DF5DY SK0HB RR73
171315  +6  576  SK0HB DF5DY 73
171515  +4 1877  SK0HB OM7RU JN98 (x4)
171715  +1 2691  SK0HB ON5RZ JO21 (x3)
20m
UTC    dB Audio  Message
183245 -19 1078  SK0HB RC5F 73
180615  -6 2825  SK0HB F1PBZ -16 (x2)
180945  -8 1997  SK0HB E70SZ JN84 (x2)
181100 -21 1997  E70SZ SK0HB RR73
181115  -8 1997  SK0HB E70SZ 73
181130 -23 1997  CQ SK0HB JO89 (x3)
182045  -6 2428  SK0HB HG8IT RR73
182345 -15 1995  SK0HB F1PPH 73
182945 -10 2214  SK0HB R6DJR -12
185200  -2 1779  SK0HB CN2DX +07 (x2)
10m
UTC    dB Audio  Message
170845 -10 1193  SK0HB PA3AGN JO22 (x4)
171215  -7 2276  SK0HB PD1HPB R-08 (x2)
172045 -16 2274  SK0HB DB5HA 73
175915 -18 2297  SK0HB DK4RH R+00
180345 -11  889  SK0HB DK7UY 73
181445 -16 2296  SK0HB R7RAE KN64

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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