OK1MDK — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Czech Republic Most frequent locator attributed to this token: JN79

Receiver-side FT8 activity involving OK1MDK, decoded by SO8OO in southeastern Poland. 275 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 18 UTC dates in the available aggregate history. Observed between 2026-06-06 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 275 FT8 messages attributed to OK1MDK 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 (45%), followed by 20 m (40%) and 80 m (13%). Several six-hour UTC windows tied for the largest share (51%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (70%); the estimated median was -3 dB.

Overview

275
Messages attributed
18
UTC dates decoded
50
Active 15-min windows
-3 dB
Estimated median S/N

Bands

80m · 36 40m · 125 20m · 110 10m · 4
First attributed message: 2026-06-06
Last attributed message: 2026-09-12 11:03 UTC

Observed FT8 message patterns

Attributed sample
275 messages
Active dates
18 UTC dates
Estimated median S/N
-3 dB
Estimated 10th-90th percentile
-16 to +9 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 28, moderate (-15 to -9 dB) 55, strong (≥ -8 dB) 192.

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 OK1MDK 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 OK1MDK

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
JN79 · 162 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
491 km (approx.)
Last such locator decoded
2026-09-12 11:03 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 UTCBandOK1MDK S/NCounterpartCounterpart S/NMsgsCapture
09-12 11:00 40m -4 / - YU4HAK - / -19 4 ✓ Closing fragment
09-12 10:56 40m -6 / -4 HA3TBL -12 / - 6 ✓ Full exchange observed
09-12 10:55 40m -7 / - ON1DGN - / +2 2 ✓ Closing fragment
09-12 10:54 40m -8 / - OE5ABL - / +4 2 ✓ Closing fragment
08-31 10:53 20m +8 / - EB3CGQ - / -6 3 Partial capture
08-31 10:50 20m +5 / - OT8T - / +4 2 ✓ Closing fragment
08-31 10:48 20m +9 / - II7MGBT - / - 3 Partial capture
08-31 10:47 20m +10 / - 5V5BDF/R - / - 2 Partial capture
08-31 10:45 20m +6 / - PB0ACU -1 / +1 3 ✓ Closing observed
08-31 10:43 20m +9 / - DD7XX - / -6 2 ✓ Closing fragment
08-31 10:42 20m 0 / - IU4DTV - / - 2 ✓ Closing fragment
08-31 10:39 20m +2 / - GB2WVR -4 / +4 4 ✓ Closing observed
08-30 10:28 20m - / - DL5HBF -8 / - 2 Partial capture
08-30 10:27 20m - / -11 PD1HPB +5 / - 3 Partial capture
08-30 10:22 20m -6 / -8 PD9FLX +3 / -10 4 ✓ Full exchange observed
08-26 08:34 20m - / -15 II7MGBT +9 / - 4 Partial capture
08-24 11:04 10m - / -3 G4PMZ -16 / - 3 ✓ Closing fragment
08-21 10:33 20m -1 / +5 HB9CNU -4 / - 3 ✓ Closing observed
08-21 10:32 20m - / - DL1YS -10 / - 6 Partial capture
08-21 10:31 20m +2 / - UR5WCS - / -1 3 ✓ Closing fragment
08-19 10:51 20m - / -15 RZ4FWA -16 / - 2 Partial capture
08-06 11:03 10m - / - SM6KKX -24 / - 2 Partial capture
08-06 10:56 10m - / -4 PD2V -12 / - 2 Partial capture
08-05 10:46 20m -18 / - TA1MHS - / -5 5 ✓ Closing fragment
08-04 11:13 20m - / -7 R7OV -20 / - 3 ✓ Closing fragment
07-30 10:47 20m - / -11 RY7G -8 / - 3 ✓ Closing fragment
07-22 08:33 20m +1 / - <...> - / - 3 Partial capture
07-22 08:28 20m -2 / -10 DL1LOL -16 / -9 6 ✓ Full exchange observed
07-17 10:41 20m -20 / - G5MJF - / -7 2 ✓ Closing fragment
07-17 10:38 20m -15 / +2 PE9JAN 0 / - 4 ✓ Closing observed
07-17 10:35 20m - / -7 ON6DSL -18 / - 2 Partial capture
07-16 10:52 20m - / -14 F1PBZ -18 / - 2 ✓ Closing fragment
07-05 02:13 80m +9 / - K2K - / - 2 Partial capture
07-05 02:09 80m - / -21 R4AAR -22 / - 2 Partial capture
07-05 02:08 80m +8 / - HK3X - / - 7 Partial capture
07-05 02:07 80m +15 / - SN0WWA - / - 3 Partial capture
07-05 01:57 80m +13 / - SN4WWA +6 / -16 5 ✓ Full exchange observed
07-05 01:57 80m +20 / - HI8WWA - / - 7 Partial capture
07-05 01:56 80m - / -2 TM2WWA +15 / - 2 Partial capture
07-05 01:54 80m +7 / - SK3WWA +3 / -18 4 ✓ Full exchange observed
06-30 20:00 80m +4 / +1 UA4FKT +9 / -11 7 ✓ Full exchange observed
06-30 19:59 80m +5 / +2 II3WWA +4 / -11 6 ✓ Full exchange observed
06-30 18:59 40m -14 / - II1WWA - / - 4 Partial capture
06-30 18:55 40m -11 / +8 TM2WWA -12 / - 6 ✓ Full exchange observed
06-30 18:52 40m -11 / - II5WWA - / - 5 ✓ Closing fragment
06-30 18:50 40m -12 / - SN4WWA -11 / - 4 ✓ Full exchange observed
06-30 18:49 40m -10 / - II8WWA - / - 2 Partial capture
06-30 18:44 40m -10 / - II3WWA -14 / +7 8 ✓ Full exchange observed
06-30 10:31 20m - / -5 II3WWA -8 / - 2 ✓ Closing fragment
06-30 10:22 20m -8 / +1 II9WWA -22 / - 5 Partial capture

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
105715  -3 1695  HA3TBL OK1MDK RR73
105730 -12 1940  OK1MDK HA3TBL 73
105745  -8 1695  CQ OK1MDK JN79 (x6)
110045  +0 1695  YU4HAK OK1MDK -19 (x4)
110245  -2 1695  CQ OK1MDK JN79 (x3)
20m 
UTC    dB Audio  Message
104715  +9 1958  5V5BDF/R OK1MDK JN79 (x2)
104815 +11 2103  II7MGBT OK1MDK JN79 (x3)
104945  -1 1958  CQ OK1MDK JN79
105015  +7 1958  OT8T OK1MDK +04 (x2)
105345  +9 1958  EB3CGQ OK1MDK -06 (x3)
105515  +2 1958  CQ OK1MDK JN79 (x4)
10m 
UTC    dB Audio  Message
104845 -15 1899  OK1MDK II9WWA RRR (x2)
105215  +8 2796  OK1MDK TM2WWA -04 (x2)
105600  -6 1721  OK1MDK II2WWA RR73
103430 -14 2298  OK1MDK YR50NADIA -10
080100 -18 1896  OK1MDK PD1ALW RR73
105445  +4 2484  OK1MDK F1PBZ -08
105615 -10 2486  OK1MDK PD2V JO22 (x2)
110315 -23 1654  OK1MDK SM6KKX JO67 (x2)
110430 -16 1369  OK1MDK G4PMZ IO91 (x3)
80m 
UTC    dB Audio  Message
020215 +17 2700  HI8WWA OK1MDK JN79
020715  +9 1142  SN0WWA OK1MDK JN79 (x3)
020845  +6 1382  HK3X OK1MDK JN79
020900 -22 2008  OK1MDK R4AAR -21
020915  +8 1383  HK3X OK1MDK JN79
020930 -21 2007  OK1MDK R4AAR -21
020945  +4 1383  HK3X OK1MDK JN79 (x5)
021315 +10 1361  K2K OK1MDK JN79 (x2)

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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