OZ4KAJ — reception at SO8OO

Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.

FT8 activity

DXCC entity inferred from callsign: Denmark Most frequent locator attributed to this token: JO56

Receiver-side FT8 activity involving OZ4KAJ, decoded by SO8OO in southeastern Poland. 56 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 6 UTC dates in the available aggregate history. Observed between 2026-06-14 and 2026-10-17.

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 56 FT8 messages attributed to OZ4KAJ as the transmitting token by decoded message structure across 6 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (43%), followed by 80 m (36%) and 20 m (21%). Several six-hour UTC windows tied for the largest share (68%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (64%); the estimated median was -6 dB.

Overview

56
Messages attributed
6
UTC dates decoded
11
Active 15-min windows
-6 dB
Estimated median S/N

Bands

80m · 20 40m · 24 20m · 12
First attributed message: 2026-06-14
Last attributed message: 2026-10-17 17:23 UTC

Observed FT8 message patterns

Attributed sample
56 messages
Active dates
6 UTC dates
Estimated median S/N
-6 dB
Estimated 10th-90th percentile
-18 to +3 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 9, moderate (-15 to -9 dB) 11, strong (≥ -8 dB) 36.

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 OZ4KAJ 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 OZ4KAJ

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
JO56 · 30 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,022 km (approx.)
Last such locator decoded
2026-10-17 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 UTCBandOZ4KAJ S/NCounterpartCounterpart S/NMsgsCapture
10-17 17:23 80m -7 / -7 HA7JDU +12 / - 3 ✓ Closing observed
10-17 17:15 80m -6 / -13 YO4NT +6 / - 3 ✓ Closing observed
10-17 17:13 80m -4 / - UN0GY - / - 2 Partial capture
10-17 17:11 80m - / - HF5A +14 / - 2 Partial capture
10-17 17:09 80m - / -11 OH5KNL +3 / - 4 Partial capture
10-17 17:09 80m - / +6 SP1RKT 0 / - 5 Partial capture
10-17 17:08 80m - / -12 YL3PK -9 / - 2 ✓ Closing fragment
10-17 17:05 80m -11 / - UN7LZ - / - 2 Partial capture
10-17 16:51 40m -20 / +8 DJ0MAB -1 / - 7 ✓ Full exchange observed
10-17 16:46 40m -16 / - BG4UCZ - / -23 4 ✓ Closing fragment
10-08 02:17 80m -6 / - S55X - / - 3 Partial capture
10-08 02:15 80m -4 / - EB3JT - / -9 2 ✓ Closing fragment
10-08 02:14 80m +4 / -2 9A4ZM +19 / +9 5 ✓ Full exchange observed
10-08 02:12 80m +6 / - OH6FSO - / -25 4 ✓ Closing fragment
10-08 02:11 80m -5 / - S55X - / - 3 Partial capture
10-07 12:54 40m - / -16 9A4ZM -4 / - 3 ✓ Closing fragment
10-07 12:54 40m - / -15 R2EA -10 / - 2 Partial capture
10-07 12:52 40m - / -10 YO9PH 0 / - 2 ✓ Closing fragment
09-10 15:49 40m -16 / - BG7BVI - / - 3 Partial capture
09-10 15:48 40m -1 / - 9A4ZM - / -3 2 Partial capture
09-10 15:44 40m -10 / 0 LY2BSW -3 / - 4 ✓ Full exchange observed
09-10 15:42 40m - / -4 PE1NPS -10 / - 2 Partial capture
09-10 15:41 40m -5 / - TK5NJ -14 / -2 3 ✓ Closing observed
09-10 15:40 40m - / -18 UA4FEN -3 / - 2 Partial capture
09-10 15:37 40m - / - US3EW +9 / - 2 Partial capture
09-10 15:36 40m 0 / -9 Z3/DD3ZZ -5 / -13 7 Partial capture
09-05 15:00 80m - / -11 DK7ZT -6 / - 2 ✓ Closing fragment
09-05 14:58 80m - / 0 OZ7KJ/P -8 / - 3 ✓ Closing fragment
08-28 09:07 20m -13 / - KH6DC - / - 3 Partial capture
08-28 08:51 20m - / -12 EB3JT -7 / - 3 ✓ Closing fragment
08-28 08:49 20m -13 / -1 M0PFX -12 / +5 4 ✓ Full exchange observed

Recent FT8 messages decoded at SO8OO

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

80m 
UTC    dB Audio  Message
171000  +2 1556  OZ4KAJ SP1RKT JO84 (x3)
171100 +13 2681  OZ4KAJ HF5A JO92
171130  +6 1828  OZ4KAJ OH5KNL R-11
171130 +14 2681  OZ4KAJ HF5A JO92
171200  -3 1829  OZ4KAJ OH5KNL R-11
171330  -4 2452  UN0GY OZ4KAJ JO56 (x2)
171500  +7 1961  OZ4KAJ YO4NT -13 (x2)
171545  -6 1960  YO4NT OZ4KAJ 73
172300 +11 1178  OZ4KAJ HA7JDU -07 (x2)
172345  -7 1177  HA7JDU OZ4KAJ 73
40m 
UTC    dB Audio  Message
125430  -4 2500  OZ4KAJ 9A4ZM R-16 (x2)
164600 -18 2243  BG4UCZ OZ4KAJ JO56 (x4)
165000 -19 1883  GI0VAB OZ4KAJ JO56
165115  -2 1883  OZ4KAJ DJ0MAB JN49 (x3)
165230 -19 1884  DJ0MAB OZ4KAJ +16
165245  +0 1883  OZ4KAJ DJ0MAB R+08
165300 -20 1884  DJ0MAB OZ4KAJ RR73
165315  -2 1883  OZ4KAJ DJ0MAB 73
165745 -21 1425  GX3FSR OZ4KAJ R-06
20m 
UTC    dB Audio  Message
084730 +10 2571  OZ4KAJ LA5AKA RR73
084915 -13 2571  M0PFX OZ4KAJ +05
085030  -4 1064  OZ4KAJ M0PFX R-01 (x2)
085100  -6 2571  OZ4KAJ EB3JT JN01 (x3)
085230 -19 1063  OZ4KAJ M0PFX R-07
085515 -17 1639  OZ4KAJ JY5IB -16
090245  +0  379  OZ4KAJ TA1MB -15
090715 -14 2920  KH6DC OZ4KAJ JO56 (x3)

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.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

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