SP3MKR — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Poland Most frequent locator attributed to this token: JO82

Receiver-side FT8 activity involving SP3MKR, decoded by SO8OO in southeastern Poland. 334 FT8 messages attributed to this token as transmitter, on 160m, 80m, 60m, 40m, 20m, across 18 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-07-25.

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 334 FT8 messages attributed to SP3MKR as the transmitting token by decoded message structure across 18 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (63%), followed by 160 m (16%) and 80 m (10%). Most decodes (77%) fell within the six-hour window 17:00-23:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (75%); the estimated median was 0 dB.

Overview

334
Messages attributed
18
UTC dates decoded
49
Active 15-min windows
0 dB
Estimated median S/N

Bands

160m · 54 80m · 35 60m · 21 40m · 210 20m · 14
First attributed message: 2026-06-07
Last attributed message: 2026-07-25 17:14 UTC

Observed FT8 message patterns

Attributed sample
334 messages
Active dates
18 UTC dates
Estimated median S/N
0 dB
Estimated 10th-90th percentile
-14 to +10 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 24, moderate (-15 to -9 dB) 58, strong (≥ -8 dB) 252.

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 SP3MKR 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 SP3MKR

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
JO82 · 163 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
439 km (approx.)
Last such locator decoded
2026-07-25 17:14 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 UTCBandSP3MKR S/NCounterpartCounterpart S/NMsgsCapture
07-25 17:14 40m -18 / -6 UW5KW -1 / - 3 Partial capture
07-25 17:12 40m -10 / - DL3TA - / +1 3 ✓ Closing fragment
07-25 17:11 40m -12 / - DL0SOP -19 / +10 3 ✓ Closing observed
07-25 14:04 20m - / -4 CN2DX -10 / - 2 ✓ Closing fragment
07-25 13:58 20m - / 0 F5ADE -13 / - 3 Partial capture
07-25 13:57 20m - / -3 EB3JT -11 / - 6 ✓ Closing fragment
07-24 08:51 40m -12 / - UT4PA -6 / -5 6 ✓ Closing observed
07-23 10:17 20m - / - 9A4ZM -12 / - 2 Partial capture
07-21 20:41 20m - / -10 A61CK -7 / - 3 ✓ Closing fragment
07-21 20:18 40m -10 / - RL2F - / +2 3 ✓ Closing fragment
07-21 20:17 40m -9 / +4 LZ1ZF -10 / - 2 Partial capture
07-21 20:13 40m -8 / - 8S7DL - / +8 3 ✓ Closing fragment
07-18 15:58 20m - / -10 UX7QV -3 / - 2 ✓ Closing fragment
07-12 14:31 20m - / -9 EA3HMM +4 / - 2 ✓ Closing fragment
07-04 18:21 80m -4 / - SN93LOT -4 / - 4 Partial capture
07-04 18:20 80m -2 / -5 HG8LXL +7 / - 5 Partial capture
07-04 18:16 80m 0 / +8 DL5JMN -10 / -12 5 ✓ Full exchange observed
07-04 16:04 40m -12 / -1 DJ3HW -14 / 0 4 ✓ Full exchange observed
07-04 16:01 40m -17 / - IS0AFM - / - 3 Partial capture
07-04 15:38 40m - / -1 OE7CST -6 / - 2 ✓ Closing fragment
06-30 20:11 40m -15 / - SK3WWA - / - 5 Partial capture
06-30 19:39 80m -1 / - TM2WWA - / - 7 Partial capture
06-30 19:37 80m +8 / -1 II6WWA -1 / 0 4 ✓ Full exchange observed
06-30 19:29 40m -6 / - SN0WWA -8 / - 3 Partial capture
06-30 19:27 40m -7 / - II2WWA -18 / -2 4 ✓ Closing observed
06-30 19:24 40m -2 / - OP0WWA - / - 5 Partial capture
06-30 19:23 40m - / - DL9KM -20 / - 3 Partial capture
06-30 19:23 40m - / - F5RRS -16 / - 2 Partial capture
06-30 19:22 40m -7 / - II0WWA -5 / -10 3 ✓ Closing observed
06-30 19:17 40m -15 / - II1WWA - / -9 5 ✓ Closing fragment
06-30 19:14 40m -9 / - II0WWA - / - 3 Partial capture
06-30 17:52 40m -13 / - II8WWA - / -12 2 ✓ Closing fragment
06-30 17:50 40m -13 / - SK3WWA - / - 3 Partial capture
06-30 17:41 40m -10 / - II9WWA - / -10 2 Partial capture
06-30 17:39 40m -5 / - GB2WWA - / - 3 ✓ Closing fragment
06-30 17:35 40m -8 / 0 II5WWA -15 / -3 6 ✓ Full exchange observed
06-30 17:33 40m -16 / - II6WWA - / -14 3 ✓ Closing fragment
06-30 17:17 20m - / -2 GB2WWA +11 / - 2 ✓ Closing fragment
06-30 17:13 20m - / -2 TM2WWA +2 / - 3 ✓ Closing fragment
06-30 17:07 20m - / - 9A4ZM -6 / - 2 Partial capture
06-30 17:01 20m - / 0 II7WWA -16 / - 2 ✓ Closing fragment
06-27 04:35 20m - / +1 YL2KF -24 / - 2 ✓ Closing fragment
06-27 04:33 20m - / -14 CR7BUJ -14 / - 4 ✓ Closing fragment
06-26 05:41 20m -16 / - 9A5E - / -1 2 Partial capture
06-26 05:32 20m -9 / - LA1HW - / -11 2 Partial capture
06-24 07:39 10m - / - F6IQA +2 / - 6 Partial capture

Recent FT8 messages decoded at SO8OO

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

20m 
UTC    dB Audio  Message
135815 -14 1277  SP3MKR F5ADE +00
135815 -11 2345  SP3MKR EB3JT R-03
135845 -15 1277  SP3MKR F5ADE +00
135845 -12 2345  SP3MKR EB3JT R-03
135915 -10 1277  SP3MKR F5ADE +00
135915 -13 2345  SP3MKR EB3JT 73 (x2)
140400  -8 1779  SP3MKR CN2DX -04 (x2)
140915 -19 1903  AP2TN SP3MKR JO82
164445 -14 1038  SP3MKR DF5EI -06
210800 -10  513  SP3MKR EA1IOK 73
211300 -20 1868  SP3MKR EX8ABR RR73
034100 -21 1728  SP3MKR W8JRK -07
174300 -13 1056  SP3MKR A61DD RR73
40m 
UTC    dB Audio  Message
085145 -10 1029  SP3MKR UT4PA KO20
085300 -11  594  PE9JAN SP3MKR 73
085315  -4  595  SP3MKR UT4PA KO20 (x2)
085400 -12  595  UT4PA SP3MKR -05
085445  -7  595  SP3MKR UT4PA 73
171100 -17 1669  DL0SOP SP3MKR R+10
171115 -19 1669  SP3MKR DL0SOP RRR
171130  -8 1669  DL0SOP SP3MKR 73
171200  -9 1333  DL3TA SP3MKR JO82 (x3)
171415 -19 1520  UW5KW SP3MKR JO82
171430  -1 1520  SP3MKR UW5KW -06
171445 -16 1520  UW5KW SP3MKR R+13
80m 
UTC    dB Audio  Message
194215  +2 1942  TM2WWA SP3MKR JO82
181600  +1 1895  DL5JMN SP3MKR JO82
181615  -8 1895  SP3MKR DL5JMN +08
181630  -2 1895  DL5JMN SP3MKR R-12
181645 -13 1895  SP3MKR DL5JMN RR73
181700  +0 1895  DL5JMN SP3MKR 73
182045  +0  846  HG8LXL SP3MKR JO82 (x2)
182145  -8 1443  <SN93LOT> SP3MKR JO82 (x2)
182230  +4  845  SP3MKR HG8LXL -05 (x3)
182345  +1 1443  SN93LOT SP3MKR JO82
182400  -4 1443  SP3MKR SN93LOT +11
10m 
UTC    dB Audio  Message
072730 -21 1366  SP3MKR EA6TU -01
073900  +0 2692  SP3MKR F6IQA JN13 (x6)
135230 -20 1726  SP3MKR DF9MV RR73
105545 -10 2036  SP3MKR F4FSY RR73

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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