OZ4MK — FT8 activity observed at SO8OO

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

Receiver-side FT8 activity involving OZ4MK, decoded by SO8OO in southeastern Poland. 424 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 16 UTC dates in the available aggregate history. Observed between 2026-07-19 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 424 FT8 messages attributed to OZ4MK as the transmitting token by decoded message structure across 16 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (76%), followed by 10 m (23%) and 80 m (1%). Most decodes (62%) fell within the six-hour window 04:00-10:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -8 dB.

Overview

424
Messages attributed
16
UTC dates decoded
65
Active 15-min windows
-8 dB
Estimated median S/N

Bands

80m · 4 40m · 322 20m · 2 10m · 96
First attributed message: 2026-07-19
Last attributed message: 2026-09-12 13:33 UTC

Observed FT8 message patterns

Attributed sample
424 messages
Active dates
16 UTC dates
Estimated median S/N
-8 dB
Estimated 10th-90th percentile
-18 to +1 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 70, moderate (-15 to -9 dB) 128, strong (≥ -8 dB) 226.

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 OZ4MK 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 OZ4MK

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 · 249 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
855 km (approx.)
Last such locator decoded
2026-09-12 13:31 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 UTCBandOZ4MK S/NCounterpartCounterpart S/NMsgsCapture
09-13 08:55 40m - / -16 S51TN 0 / - 2 ✓ Closing fragment
09-13 08:51 40m - / -19 F4DIA -16 / - 2 ✓ Closing fragment
09-12 13:34 40m - / -1 HA8LD -2 / - 2 ✓ Closing fragment
09-12 13:32 40m -20 / - LB5WB - / +4 2 ✓ Closing fragment
09-12 13:31 40m -19 / - UB3ADO/P - / +7 2 Partial capture
09-11 09:27 40m -21 / - LB6NK - / 0 4 ✓ Closing fragment
09-11 09:25 40m -21 / -25 SP7ROM -6 / - 4 ✓ Closing observed
09-11 08:41 40m -21 / - E75FM - / - 2 Partial capture
09-11 06:19 40m -20 / - LZ1ON - / - 3 Partial capture
09-11 06:14 40m -17 / - J38DX - / - 3 Partial capture
09-11 06:09 40m -11 / - J38DX - / - 5 Partial capture
09-11 06:02 40m -9 / - EA6AJW - / -10 7 ✓ Closing fragment
09-11 05:22 40m -6 / - M0CKX - / -6 3 ✓ Closing fragment
09-11 05:20 40m -9 / -15 F4BJN -12 / -14 9 ✓ Full exchange observed
09-11 05:17 40m -10 / -14 YL3CU 0 / -6 6 ✓ Full exchange observed
09-07 14:11 40m -23 / -1 OE6GBG +3 / - 3 ✓ Closing observed
09-06 16:43 40m -8 / - UN8DSW - / -15 7 ✓ Closing fragment
09-06 15:56 40m - / - DL0HAM +20 / - 2 Partial capture
09-06 15:55 40m -10 / - LY3VD - / -20 2 ✓ Closing fragment
09-06 15:51 40m -7 / - DG5NAB - / -7 2 Partial capture
09-06 15:44 40m -4 / -5 SP7OK -6 / -1 6 ✓ Full exchange observed
09-04 18:49 40m - / - SV9QWC -8 / - 2 ✓ Closing fragment
09-04 18:47 40m -9 / - RT1I - / +4 3 ✓ Closing fragment
09-04 18:45 40m -2 / - SV9QWC - / - 2 Partial capture
09-04 18:43 40m -9 / - RL2F - / +5 3 ✓ Closing fragment
09-04 18:41 40m -9 / - G4DBW - / -2 3 ✓ Closing fragment
09-04 18:01 40m -2 / - BG2GWN - / - 9 Partial capture
09-04 17:52 40m -11 / - MI5JYK - / -2 3 Partial capture
09-04 17:47 40m +3 / - EU4BE - / +4 3 ✓ Closing fragment
09-04 17:44 40m -10 / - 8S2A - / - 3 Partial capture
09-04 17:40 40m -12 / - BG7BVP - / -1 4 Partial capture
09-04 17:36 40m 0 / - RV9UNK - / - 6 Partial capture
09-04 17:32 40m -6 / - OO0O - / -7 5 Partial capture
09-04 17:28 40m 0 / -12 RA9SJG -3 / - 6 ✓ Closing observed
09-04 17:26 40m -4 / - 4X1UF - / -13 3 ✓ Closing fragment
09-04 17:21 40m - / -6 EA3CK -10 / - 2 ✓ Closing fragment
09-04 17:12 40m -12 / - EA3CK - / - 3 Partial capture
09-04 17:01 40m -13 / - RL1I/P - / - 5 Partial capture
09-04 16:58 40m -5 / 0 OL5GMA 0 / +3 5 ✓ Full exchange observed
09-04 16:55 40m -5 / - RA9CUU - / -8 3 ✓ Closing fragment
09-04 16:49 40m -14 / - BG7BVP - / - 2 Partial capture
09-04 16:46 40m +8 / -15 RN6LBT +2 / -8 5 ✓ Full exchange observed
09-04 16:27 40m -8 / -6 S57NCP -2 / -4 6 ✓ Full exchange observed
09-04 16:24 40m -7 / -16 UT0IN -4 / -3 6 ✓ Full exchange observed
09-04 16:23 40m -9 / - EX7CQ - / - 2 Partial capture
09-04 16:16 40m -6 / - LB9KJ - / -6 3 Partial capture
09-04 16:14 40m 0 / - R8CCI - / +1 3 ✓ Closing fragment
09-04 16:11 40m -7 / -4 RM3TO -4 / +2 6 ✓ Full exchange observed
09-04 16:09 40m -7 / - EX7CQ - / - 3 Partial capture
09-04 05:49 40m -1 / - 3Z100LKK - / - 3 Partial capture

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
132900 -14 2540  OZ4MK OH2DJY RR73
132945 -19 1056  LB5WB OZ4MK JO65
133115 -18 1056  UB3ADO/P OZ4MK JO65
133130  -7 2134  OZ4MK HF100PKP -10
133145 -20 1056  UB3ADO/P OZ4MK R+07
133245 -20 1056  LB5WB OZ4MK R+04 (x2)
133445  +1 1671  OZ4MK HA8LD -01 (x2)
085145 -17 1740  OZ4MK F4DIA -19 (x2)
085515  -2  673  OZ4MK S51TN -16 (x2)
085930 +11 2679  OZ4MK RR73; LZ2BC <...> -02
090130  -3  602  OZ4MK HF5A RR73
20m 
UTC    dB Audio  Message
071630  +2 2208  OZ4MK 9A5E RR73
071645 -13 1045  9A5E OZ4MK 73
071700 -10 1045  OZ4MK F5IXN JN23 (x4)
094500 -10 2178  SP5ZTM OZ4MK JO65
10m 
UTC    dB Audio  Message
083345  -6  417  OZ4MK R70OBN RR73
143430 -10  953  OZ4MK Z35U -05
121700 -13 2115  OZ4MK SV1CQN -18 (x3)
172800 -17 1972  OZ4MK YO9PH -06 (x2)
173145  +0  775  OZ4MK Z61DX -09 (x2)
163630 -16 1074  OZ4MK 9K2YM -12 (x2)
152630 -14 2347  OZ4MK LZ1JZ -09 (x2)
160815 -20 1401  OZ4MK Z3123KR -17
093730 -24 1739  OZ4MK CU2AP RR73
80m 
UTC    dB Audio  Message
023800 -18  942  OE8DDX OZ4MK JO65 (x2)
023845 +19  610  OZ4MK OE8DDX -07
023900 -16  942  OE8DDX OZ4MK R+15
023915 +17  610  OZ4MK OE8DDX RR73
023930 -12  942  OE8DDX OZ4MK 73
023945 -10  944  OZ4MK UA4FKT LO23 (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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