OK2CRB — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Czech Republic Most frequent locator attributed to this token: JN89

Receiver-side FT8 activity involving OK2CRB, decoded by SO8OO in southeastern Poland. 49 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 7 UTC dates in the available aggregate history. Observed between 2026-07-07 and 2026-08-07.

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 49 FT8 messages attributed to OK2CRB as the transmitting token by decoded message structure across 7 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (47%), followed by 80 m (45%) and 20 m (8%). Several six-hour UTC windows tied for the largest share (67%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -13 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-13 dB

Estimated median S/N

Bands

80m · 22 40m · 23 20m · 4

First attributed message: 2026-07-07
Last attributed message: 2026-08-07 22:17 UTC

Observed FT8 message patterns

Attributed sample: 49 messages
Active dates: 7 UTC dates
Estimated median S/N: -13 dB
Estimated 10th-90th percentile: -18 to -2 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 16, moderate (-15 to -9 dB) 16, strong (≥ -8 dB) 17.

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 OK2CRB in decoded directed-looking exchanges:

F5ADE · France SV2CLJ · Greece 5B4ASY · Cyprus ES2DR · Estonia F4LNM · France PI4DX · Netherlands SV/AA6PP · Greece 4O7CC · Montenegro 9A7BB · Croatia DL1IP · Fed. Rep. of Germany LZ3HG · Bulgaria OK2USB · Czech Republic

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 OK2CRB

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: JN89 · 25 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 348 km (approx.)
Last such locator decoded: 2026-08-07 22:15 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	OK2CRB S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-10 06:02	20m	- / -18	A61QQ	-10 / -	2	Partial capture
08-08 20:47	20m	- / -6	PI4DX	-16 / -	3	✓ Closing fragment
08-07 22:17	40m	-14 / -	OM7AMA	- / -9	2	✓ Closing fragment
08-07 22:15	80m	- / -23	DO2PY	-6 / -	2	Partial capture
08-05 07:41	20m	- / -15	F4LNM	-11 / -	3	✓ Closing fragment
08-05 07:40	20m	- / -	RA6OY	+3 / -	5	Partial capture
07-20 08:02	10m	- / +4	F5ADE	-13 / -	2	✓ Closing fragment
07-18 08:12	10m	- / -	SV2CLJ	-9 / -	2	Partial capture
07-14 06:18	40m	-13 / -	DL6UM	- / -	3	Partial capture
07-14 06:13	40m	-17 / -	DB5HA	- / -13	2	Partial capture
07-14 06:11	40m	- / -	OK3MET	-20 / -	3	Partial capture
07-10 05:34	40m	-17 / -	4O7CC	- / -15	4	✓ Closing fragment
07-09 19:40	40m	-15 / -12	SP3SWJ	-16 / -	3	✓ Closing observed
07-09 19:39	40m	-16 / -	S59A	- / -	2	Partial capture
07-09 19:37	40m	-21 / -10	9A7BB	-14 / -	3	✓ Closing observed
07-09 19:31	80m	-13 / -18	RC6OD	+7 / -5	9	✓ Full exchange observed
07-09 19:03	20m	- / -8	M/TF1OL	-7 / -	2	Partial capture
07-08 16:12	20m	-13 / -	ES2DR	- / -10	3	✓ Closing fragment
07-07 20:01	80m	-4 / -3	9A2AJ	+12 / +2	5	✓ Full exchange observed
07-07 19:59	80m	-4 / -	<...>	- / -5	2	Partial capture
07-07 19:57	40m	- / -4	OK2USB	+2 / -	2	✓ Closing fragment
07-07 19:54	40m	-8 / -	LZ3HG	-18 / -	2	✓ Closing observed
07-07 19:49	40m	-16 / -17	DL1IP	-13 / -	4	✓ Closing observed
07-07 19:36	80m	-4 / -	DO5HOK	- / -	3	Partial capture
07-07 19:32	80m	-11 / -12	DO1GMT	-18 / -	3	✓ Closing observed
07-07 19:31	80m	-12 / -	PE0TS	- / -	2	Partial capture
07-07 19:28	80m	-4 / -	R9SAP	- / -	2	Partial capture
07-07 19:23	80m	-8 / -	S56VOM	-1 / -3	6	✓ Closing observed
07-07 06:21	40m	- / -19	YR50NADIA	-8 / -	4	Partial capture
06-30 05:46	20m	- / -1	SV/AA6PP	-2 / -	3	✓ Closing fragment
06-30 05:31	20m	- / -19	5B4ASY	-6 / -	4	✓ Closing fragment
06-30 05:19	20m	- / -	G3TKT	-8 / -	3	Partial capture
06-28 15:40	20m	- / -	SQ3BYH	-9 / -	7	Partial capture

Recent FT8 messages decoded at SO8OO

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

20m

UTC    dB Audio  Message
074045  +3  323  OK2CRB RA6OY KN88 (x2)
074115  -8 1166  OK2CRB F4LNM JN09
074145  +6  323  OK2CRB RA6OY KN88
074145  -9 1166  OK2CRB F4LNM R-15
074215 -18 2350  OK2CRB UR3VCJ KN68
074215  +0  323  OK2CRB RA6OY KN88
074215 -16 1166  OK2CRB F4LNM 73
074245  +0  323  OK2CRB RA6OY KN88
074245  -2  346  OK2CRB EA3HMM JN00
204700 -16 2255  OK2CRB PI4DX -06 (x3)
060200 -11  558  OK2CRB A61QQ -18 (x2)

40m

UTC    dB Audio  Message
060145 -13 1243  CQ OK2CRB JN89 (x2)
060800 -21 1352  OK2CRB DA1ST JO41
061130 -21 1302  OK2CRB OK3MET JN89 (x3)
061315 -18 1273  DB5HA OK2CRB -13 (x2)
061545 -18 1012  DL6UM OK2CRB -01 (x4)
221530 -12  836  DO2PY OK2CRB JN89
221700 -14  827  OM7AMA OK2CRB R-09 (x2)

80m

UTC    dB Audio  Message
200130 +10 2643  OK2CRB 9A2AJ -03
200145  +4 2644  9A2AJ OK2CRB R+02
200200 +15 2643  OK2CRB 9A2AJ RR73
200215  -8 2644  9A2AJ OK2CRB 73
193130  -8  878  RC6OD OK2CRB JN89 (x2)
193215  +9  878  OK2CRB RC6OD -18
193230 -19  879  RC6OD OK2CRB R-05
193245  +7  878  OK2CRB RC6OD -18
193300 -16  878  RC6OD OK2CRB R-05
193315  +6  878  OK2CRB RC6OD -18
193330  -8  878  RC6OD OK2CRB R-05
193345  +7  878  OK2CRB RC6OD RR73
221545  -8  829  OK2CRB DO2PY -23 (x2)

10m

UTC    dB Audio  Message
081230 -10  737  OK2CRB SV2CLJ KN10 (x3)
080230 -13 1724  OK2CRB F5ADE +04 (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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