OK4KD — 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: Czech Republic Most frequent locator attributed to this token: JO70

Receiver-side FT8 activity involving OK4KD, decoded by SO8OO in southeastern Poland. 59 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 13 UTC dates in the available aggregate history. Observed between 2026-06-15 and 2026-10-18.

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 59 FT8 messages attributed to OK4KD as the transmitting token by decoded message structure across 13 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (63%), followed by 20 m (31%) and 10 m (7%). Most decodes (92%) fell within the six-hour window 16:00-22:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -12 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-12 dB

Estimated median S/N

Bands

40m · 37 20m · 18 10m · 4

First attributed message: 2026-06-15
Last attributed message: 2026-10-18 12:41 UTC

Observed FT8 message patterns

Attributed sample: 59 messages
Active dates: 13 UTC dates
Estimated median S/N: -12 dB
Estimated 10th-90th percentile: -19 to -5 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 18, moderate (-15 to -9 dB) 23, strong (≥ -8 dB) 18.

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 OK4KD in decoded directed-looking exchanges:

F4FLF · France F4HTA · France F6FHZ · France M0BEW · England UX2SB · Ukraine EA5OL · Spain EG2FPA · Spain HB9XBY · Switzerland IU1TLG · Italy JA4FKX · Japan ON1DGN · Belgium OR5T · Belgium

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 OK4KD

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: JO70 · 28 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 487 km (approx.)
Last such locator decoded: 2026-10-18 12:36 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 UTC	Band	OK4KD S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-18 12:41	10m	-19 / -14	F4FLF	-17 / -	2	✓ Closing observed
10-16 17:06	40m	- / -5	ON3CCM	-2 / -	2	✓ Closing fragment
10-16 17:00	40m	-6 / -14	LZ2VQ	-9 / -25	8	Partial capture
10-16 17:00	40m	- / -	PE1NPS	-10 / -	4	Partial capture
10-04 16:48	40m	- / -	DL4DW	+9 / -	6	Partial capture
10-04 16:48	40m	- / -	RN2F	-10 / -	2	Partial capture
09-24 18:58	40m	-9 / -7	F6BHK	-13 / -	2	✓ Closing observed
09-24 18:57	40m	- / -	S51PV	-17 / -	2	Partial capture
09-22 14:28	40m	-10 / -1	HB9ELE	+3 / -5	5	✓ Full exchange observed
09-18 18:38	40m	-6 / -	F5PBG	-3 / -3	3	✓ Closing observed
09-18 18:36	40m	-6 / -3	YO8DHA	+9 / +7	4	Partial capture
09-18 18:35	40m	- / -	SQ9BDB	-4 / -	3	Partial capture
09-15 20:23	40m	- / -	PE1NPS	-12 / -	3	Partial capture
08-30 10:49	20m	- / -5	OR5T	+10 / -	3	✓ Closing fragment
08-27 21:03	20m	- / -	DL1UDO	-5 / -	2	Partial capture
08-16 18:18	20m	-11 / -	F1PPH	-15 / -15	4	Partial capture
08-16 18:17	20m	- / -	PD1ADA	-18 / -	2	Partial capture
08-16 18:14	20m	-18 / -13	JA4FKX	-8 / -12	4	✓ Full exchange observed
08-16 17:53	20m	- / -8	F1ODM	-9 / -	5	Partial capture
08-16 17:51	20m	-9 / -	LX1NO	- / -	3	Partial capture
08-16 17:47	20m	-8 / +8	IU1TLG	-18 / -	3	✓ Closing observed
08-16 17:45	20m	- / -10	ON1DGN	-16 / -	2	✓ Closing fragment
08-16 17:41	10m	- / -2	M0BEW	-12 / -	2	✓ Closing fragment
08-14 20:02	20m	- / 0	EG2FPA	-4 / -	2	✓ Closing fragment
08-14 19:57	20m	- / -10	EA5OL	-8 / -	4	✓ Closing fragment
08-13 18:51	20m	- / -13	HB9XBY	-7 / -	5	✓ Closing fragment
08-13 18:51	20m	- / -	DB1EF	-16 / -	2	Partial capture
08-13 18:51	20m	- / -11	ON1DGN	-18 / -	2	Partial capture
08-12 20:38	10m	- / -19	PA4O	+8 / -	3	Partial capture
08-12 20:36	10m	- / -7	F4HTA	-8 / -	2	✓ Closing fragment
08-12 20:29	20m	- / -	F1PBZ	-6 / -	3	Partial capture
08-12 20:25	20m	-9 / -5	PA7TT	-6 / -	3	✓ Closing observed
08-08 20:12	40m	-15 / -	HG8IT	-15 / -	2	✓ Closing observed
08-08 20:11	40m	-16 / -	PA2KV	- / 0	2	✓ Closing fragment
08-08 20:10	40m	-21 / -	DL7ACA	-18 / -	2	✓ Closing observed
08-08 20:02	20m	- / -	F5RRS	-5 / -	4	Partial capture
08-08 19:56	20m	- / -10	SV2HTW	-10 / -	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

10m

UTC    dB Audio  Message
203645  -7  927  OK4KD F4HTA -07 (x2)
203815  +8  864  OK4KD PA4O -19 (x3)
203915 -20 1241  OK4KD F6FHZ 73
174145 -13 1240  OK4KD M0BEW -02 (x2)
180415 -19 1236  UX2SB OK4KD RR73
180545 -16 1235  F6FHZ OK4KD -07
123645 -16 1243  CQ OK4KD JO70
124130 -17 1243  OK4KD F4FLF R-14
124145 -19 1242  F4FLF OK4KD RR73

40m

UTC    dB Audio  Message
170030  -9 1190  CQ OK4KD JO70                       ? a1
170045 -11 2519  OK4KD PE1NPS JO22
170045 -13 1190  OK4KD LZ2VQ KN23
170045  -6 2340  OK4KD IQ4JO JN63
170115  -9 2519  OK4KD PE1NPS JO22 (x2)
170200  -6 1191  LZ2VQ OK4KD -25
170215 -11 1190  OK4KD LZ2VQ R-14
170230  -7 1190  LZ2VQ OK4KD -25
170245  -8 1190  OK4KD LZ2VQ R-18
170300  -9 1190  PA2IPA OK4KD -18
170315  -6 1190  OK4KD LZ2VQ R-18 (x2)
170630  -3 1203  OK4KD ON3CCM -05 (x2)

20m

UTC    dB Audio  Message
181845 -15 1223  OK4KD F1PPH JN07 (x3)
182100 -11 1223  F1PPH OK4KD -15
182130  -9 1223  CQ OK4KD JO70 (x2)
182445 -12 1375  OK4KD F6EAZ JN27
182445 -13 1437  OK4KD EC3A -06
210300  -5 1473  OK4KD DL1UDO JO31 (x2)
210715  -5 1226  LA1SNA OK4KD -10
210930 -12 1004  OK4KD JA1XGI -10
104900 +10 1101  OK4KD OR5T -05 (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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